Fatal编程技术网
  • iphone/
  • 更换iPhone标签时的EXC_错误访问

更换iPhone标签时的EXC_错误访问

iphone objective-c cocoa-touch memory-management

更换iPhone标签时的EXC_错误访问,iphone,objective-c,cocoa-touch,memory-management,Iphone,Objective C,Cocoa Touch,Memory Management,返回时出现问题，在两个选项卡之间的第四个选项卡显示EXC_BAD_访问错误。两种视图都可以查看。假设我有两个视图A和B。如果我转到B，我可以看到没有任何问题的视图，然后转到A，这很好。但是，当返回到B时，会发生错误。我相信这是内存泄漏，但找不到它 A-控制器 @implementation FriendsViewController @synthesize tableViewIB; @synthesize userArray; @synthesize xmlData; @synthesize n

返回时出现问题，在两个选项卡之间的第四个选项卡显示EXC_BAD_访问错误。两种视图都可以查看。假设我有两个视图A和B。如果我转到B，我可以看到没有任何问题的视图，然后转到A，这很好。但是，当返回到B时，会发生错误。我相信这是内存泄漏，但找不到它

A-控制器

@implementation FriendsViewController
@synthesize tableViewIB;
@synthesize userArray;
@synthesize xmlData;
@synthesize navigationController;
@synthesize localUser;
@synthesize interestingTags;

-(void)startParsingOnlineUsers;
{
    NSXMLParser *idParser = [[NSXMLParser alloc] initWithData:xmlData];
    idParser.delegate = self;
    [idParser parse];
    [idParser release];
}

-(void)parserDidStartDocument:(NSXMLParser *)parser
{
    currentElementName = nil;
    currentText = nil;
}

-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    if([elementName isEqualToString:@"friend"])
    {
        [currentUserDict release];
        currentUserDict = [[NSMutableDictionary alloc] initWithCapacity:[interestingTags count]];
    }
    else if([interestingTags containsObject:elementName])
    {
        currentElementName = elementName;
        currentText = [[NSMutableString alloc] init];
    }
}

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    [currentText appendString:string];
}

-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if([elementName isEqualToString:currentElementName])
    {
        [currentUserDict setValue: currentText forKey: currentElementName];
    }
    else if([elementName isEqualToString:@"friend"])
    {
        [self.userArray addObject:currentUserDict];

    }

    NSLog(@"ending");
    [currentText release];
    currentText = nil;
}

-(void)parserDidEndDocument:(NSXMLParser *)parser
{
    [tableViewIB reloadData];
}



//**********************TABLE CODE***************************************

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.userArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *Cell = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Cell];

    if(cell ==nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:Cell] autorelease];
    }

    NSUInteger row = [indexPath row];
    NSDictionary *rowData = [self.userArray objectAtIndex:row];
    NSMutableString *textName = [[NSString alloc] initWithFormat:@"User: %@", [rowData objectForKey:@"username"]];
    NSMutableString *gender = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"gender"]];
    cell.textLabel.text = textName;
    cell.detailTextLabel.text = gender;

    return cell;

}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    NSUInteger row = [indexPath row];
    NSDictionary *rowData = [self.userArray objectAtIndex:row];
    NSMutableString *textNumber = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"number"]];

    NSString *phoneNumber = textNumber;                                       
    NSString *phoneNumberScheme = [NSString stringWithFormat:@"http://%@", phoneNumber];
    //NSlog(phoneNumberScheme);                    
    phoneNumberScheme = [phoneNumberScheme stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:phoneNumberScheme]];

    [tableView deselectRowAtIndexPath:indexPath animated:YES];

}

-(void)viewWillAppear:(BOOL)animated
{
    self.userArray = [[NSMutableArray alloc] init];
    interestingTags = [[NSSet alloc] initWithObjects: INTERESTING_TAG_NAMES];

    [self.userArray removeAllObjects];

    NSMutableData *data = [NSMutableData data]; 

    NSString *filePath = [self dataFilePath];

    if([[NSFileManager defaultManager] fileExistsAtPath:filePath])
    {
        NSString *string = [[NSString alloc] initWithContentsOfFile:filePath];
        self.localUser = string;
        [string release];
    }

    NSString *localString = [[NSString alloc] initWithFormat:@"userid=%@", self.localUser]; //build URL String

    [data appendData:[localString dataUsingEncoding:NSUTF8StringEncoding]]; //build URL String

    NSURL *url = [NSURL URLWithString:@"http://www.url.com/friends.php"];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; //request with the chosen url

    [request setHTTPMethod:@"POST"]; //http method
    [request setHTTPBody:data]; //set data of request to built URL String

    NSURLResponse *response;
    NSError *err;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err]; //start the request and store data in responseData
    NSLog(@"responseData: %@", responseData);

    xmlData = responseData; //store responseData in global variable

    [self startParsingOnlineUsers];

    [tableViewIB reloadData];
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)dealloc
{
    [self.navigationController release];
    [self.tableViewIB release];
    [self.userArray release];
    [self.xmlData release];
    [self.localUser release]; 
    [self.interestingTags release];
    [super dealloc];
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    self.title = @"Friends";
    navigationController.navigationBar.tintColor = [[UIColor alloc] initWithRed:154.0 / 255 green:188.0 / 255 blue:52.0 / 255 alpha:1.0];

    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

- (void)viewDidUnload
{
    self.userArray = nil;
    self.xmlData = nil;
    self.localUser = nil;
    self.navigationController = nil;
    self.tableViewIB = nil;
    self.interestingTags = nil;
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

-(NSString *)dataFilePath
{
    NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [path objectAtIndex:0];
    return [documentsDirectory stringByAppendingPathComponent:kFilename];
}

@end

@implementation FriendRequestsViewController
@synthesize navigationController;
@synthesize tableViewIB;
@synthesize userArray;
@synthesize xmlData;
@synthesize remoteUser;
@synthesize localUser;


-(void)removeArrayObjects
{
    [self.userArray removeAllObjects];
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.userArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *Cell = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Cell];

    if(cell ==nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:Cell] autorelease];
    }

    NSUInteger row = [indexPath row];
    NSDictionary *rowData = [self.userArray objectAtIndex:row];
    NSMutableString *textName = [[NSString alloc] initWithFormat:@"User: %@", [rowData objectForKey:@"username"]];
    NSMutableString *gender = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"gender"]];
    cell.textLabel.text = textName;
    cell.detailTextLabel.text = gender;

    return cell;

}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    NSUInteger row = [indexPath row];
    NSDictionary *rowData = [self.userArray objectAtIndex:row];

    NSMutableString *remoteUserId = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"id"]]; //get the user ID of friend request

    self.remoteUser = remoteUserId;

    NSMutableString *messageText = [[NSString alloc] initWithFormat:@"Do You Want To Accept %@'s Friend Request", [rowData objectForKey:@"username"]];

    UIActionSheet *reportUser = [[UIActionSheet alloc] initWithTitle:messageText delegate:self cancelButtonTitle:@"No" destructiveButtonTitle:@"Yes" otherButtonTitles:nil];

    [reportUser showInView:self.parentViewController.tabBarController.view];
    [reportUser release];


    /*NSMutableString *textNumber = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"number"]];
     NSString *phoneNumber = textNumber;                                       
     NSString *phoneNumberScheme = [NSString stringWithFormat:@"http://%@", phoneNumber];
     //NSlog(phoneNumberScheme);                    
     phoneNumberScheme = [phoneNumberScheme stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

     [[UIApplication sharedApplication] openURL:[NSURL URLWithString:phoneNumberScheme]];*/

    [tableView deselectRowAtIndexPath:indexPath animated:YES];

}

-(void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    if(buttonIndex != [actionSheet cancelButtonIndex])
    {
        NSLog(@"Accept Friend Request");
        [self performSelectorInBackground:@selector(AcceptFriendRequest) withObject:nil];
    }

}

-(void)AcceptFriendRequest
{

}

-(void)viewWillAppear:(BOOL)animated
{   
    self.userArray = [[NSMutableArray alloc] init];
    interestingTags = [[NSSet alloc] initWithObjects: INTERESTING_TAG_NAMES];

    [xmlData release];
    xmlData = [[NSMutableData alloc] init]; //alloc the holder for xml, may be large so we use nsmutabledata type

    NSMutableData *data = [NSMutableData data]; 

    NSString *filePath = [self dataFilePath];

    if([[NSFileManager defaultManager] fileExistsAtPath:filePath])
    {
        NSString *string = [[NSString alloc] initWithContentsOfFile:filePath];
        self.localUser = string;
        [string release];
    }

    NSString *useridString = [[NSString alloc] initWithFormat:@"userid=%@", self.localUser]; //build URL String

    [data appendData:[useridString dataUsingEncoding:NSUTF8StringEncoding]]; //build URL String

    NSURL *url = [NSURL URLWithString:@"http://www.url.com/friendrequests.php"];//url string to download

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; //request with the chosen url

    [request setHTTPMethod:@"POST"]; //http method
    [request setHTTPBody:data]; //set data of request to built URL String

    NSURLResponse *response;
    NSError *err;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err]; //start the request and store data in responseData
    NSLog(@"responseData: %@", responseData);

    xmlData = responseData; //store responseData in global variable

    [self startParsingFriendRequests];





    [super viewWillAppear:animated];
}

//***********************START PARSING***********************************

-(void)startParsingFriendRequests
{
    [self.userArray removeAllObjects];
    //NSLog(@"parsing init");
    NSXMLParser *onlineUserParser = [[NSXMLParser alloc] initWithData:xmlData]; //uses the NSMutableData data type to parse
    onlineUserParser.delegate = self; //set the delegate to this viewControlelr
    [onlineUserParser parse];
    [onlineUserParser release];
}

//called when the document is parsed
-(void)parserDidStartDocument:(NSXMLParser *)parser
{
    //NSLog(@"parsing started");
    currentElementName = nil;
    currentText = nil;
}

//this is called for each xml element
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict
{
    //NSLog(@"started element");
    if ([elementName isEqualToString:@"friend"]) //if elementName == status then start of new tweet so make new dictionary
    {
        [currentUserDict release];
        currentUserDict = [[NSMutableDictionary alloc] initWithCapacity:[interestingTags count]]; //make dictionary with two sections
    }
    else if([interestingTags containsObject:elementName]) //if current element is one stored in interesting tag, hold onto the elementName and make a new string to hold its value
    {
        currentElementName = elementName; //hold onto current element name
        currentText = [[NSMutableString alloc] init];
    }

}

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    //NSLog(@"appending");
    [currentText appendString:string];
}

//after each element it goes back to the parent after calling this method
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if([elementName isEqualToString:currentElementName])
    {
        [currentUserDict setValue: currentText forKey: currentElementName];
    }
    else if([elementName isEqualToString:@"friend"])
    {
        [self.userArray addObject:currentUserDict];

        //eventually placed in table just testing for now

    }

    [currentText release];
    currentText = nil;
}

-(void)parserDidEndDocument:(NSXMLParser *)parser
{
    [tableViewIB reloadData];
    //NSLog(@"DONE PARSING DOCUMENT");

}


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)dealloc
{
    [userArray release];
    [xmlData release];
    [remoteUser release];
    [localUser release];
    [navigationController release];
    [tableViewIB release];
    [super dealloc];
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    self.title = @"Friend Requests";
    navigationController.navigationBar.tintColor = [[UIColor alloc] initWithRed:154.0 / 255 green:188.0 / 255 blue:52.0 / 255 alpha:1.0];
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

- (void)viewDidUnload
{
    self.userArray = nil;
    self.xmlData = nil;
    self.remoteUser = nil;
    self.localUser = nil;
    self.navigationController = nil;
    self.tableViewIB = nil;

    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

-(NSString *)dataFilePath
{
    NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [path objectAtIndex:0];
    return [documentsDirectory stringByAppendingPathComponent:kFilename];
}
B控制器

@implementation FriendsViewController
@synthesize tableViewIB;
@synthesize userArray;
@synthesize xmlData;
@synthesize navigationController;
@synthesize localUser;
@synthesize interestingTags;

-(void)startParsingOnlineUsers;
{
    NSXMLParser *idParser = [[NSXMLParser alloc] initWithData:xmlData];
    idParser.delegate = self;
    [idParser parse];
    [idParser release];
}

-(void)parserDidStartDocument:(NSXMLParser *)parser
{
    currentElementName = nil;
    currentText = nil;
}

-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    if([elementName isEqualToString:@"friend"])
    {
        [currentUserDict release];
        currentUserDict = [[NSMutableDictionary alloc] initWithCapacity:[interestingTags count]];
    }
    else if([interestingTags containsObject:elementName])
    {
        currentElementName = elementName;
        currentText = [[NSMutableString alloc] init];
    }
}

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    [currentText appendString:string];
}

-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if([elementName isEqualToString:currentElementName])
    {
        [currentUserDict setValue: currentText forKey: currentElementName];
    }
    else if([elementName isEqualToString:@"friend"])
    {
        [self.userArray addObject:currentUserDict];

    }

    NSLog(@"ending");
    [currentText release];
    currentText = nil;
}

-(void)parserDidEndDocument:(NSXMLParser *)parser
{
    [tableViewIB reloadData];
}



//**********************TABLE CODE***************************************

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.userArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *Cell = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Cell];

    if(cell ==nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:Cell] autorelease];
    }

    NSUInteger row = [indexPath row];
    NSDictionary *rowData = [self.userArray objectAtIndex:row];
    NSMutableString *textName = [[NSString alloc] initWithFormat:@"User: %@", [rowData objectForKey:@"username"]];
    NSMutableString *gender = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"gender"]];
    cell.textLabel.text = textName;
    cell.detailTextLabel.text = gender;

    return cell;

}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    NSUInteger row = [indexPath row];
    NSDictionary *rowData = [self.userArray objectAtIndex:row];
    NSMutableString *textNumber = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"number"]];

    NSString *phoneNumber = textNumber;                                       
    NSString *phoneNumberScheme = [NSString stringWithFormat:@"http://%@", phoneNumber];
    //NSlog(phoneNumberScheme);                    
    phoneNumberScheme = [phoneNumberScheme stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:phoneNumberScheme]];

    [tableView deselectRowAtIndexPath:indexPath animated:YES];

}

-(void)viewWillAppear:(BOOL)animated
{
    self.userArray = [[NSMutableArray alloc] init];
    interestingTags = [[NSSet alloc] initWithObjects: INTERESTING_TAG_NAMES];

    [self.userArray removeAllObjects];

    NSMutableData *data = [NSMutableData data]; 

    NSString *filePath = [self dataFilePath];

    if([[NSFileManager defaultManager] fileExistsAtPath:filePath])
    {
        NSString *string = [[NSString alloc] initWithContentsOfFile:filePath];
        self.localUser = string;
        [string release];
    }

    NSString *localString = [[NSString alloc] initWithFormat:@"userid=%@", self.localUser]; //build URL String

    [data appendData:[localString dataUsingEncoding:NSUTF8StringEncoding]]; //build URL String

    NSURL *url = [NSURL URLWithString:@"http://www.url.com/friends.php"];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; //request with the chosen url

    [request setHTTPMethod:@"POST"]; //http method
    [request setHTTPBody:data]; //set data of request to built URL String

    NSURLResponse *response;
    NSError *err;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err]; //start the request and store data in responseData
    NSLog(@"responseData: %@", responseData);

    xmlData = responseData; //store responseData in global variable

    [self startParsingOnlineUsers];

    [tableViewIB reloadData];
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)dealloc
{
    [self.navigationController release];
    [self.tableViewIB release];
    [self.userArray release];
    [self.xmlData release];
    [self.localUser release]; 
    [self.interestingTags release];
    [super dealloc];
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    self.title = @"Friends";
    navigationController.navigationBar.tintColor = [[UIColor alloc] initWithRed:154.0 / 255 green:188.0 / 255 blue:52.0 / 255 alpha:1.0];

    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

- (void)viewDidUnload
{
    self.userArray = nil;
    self.xmlData = nil;
    self.localUser = nil;
    self.navigationController = nil;
    self.tableViewIB = nil;
    self.interestingTags = nil;
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

-(NSString *)dataFilePath
{
    NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [path objectAtIndex:0];
    return [documentsDirectory stringByAppendingPathComponent:kFilename];
}

@end

@implementation FriendRequestsViewController
@synthesize navigationController;
@synthesize tableViewIB;
@synthesize userArray;
@synthesize xmlData;
@synthesize remoteUser;
@synthesize localUser;


-(void)removeArrayObjects
{
    [self.userArray removeAllObjects];
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.userArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *Cell = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Cell];

    if(cell ==nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:Cell] autorelease];
    }

    NSUInteger row = [indexPath row];
    NSDictionary *rowData = [self.userArray objectAtIndex:row];
    NSMutableString *textName = [[NSString alloc] initWithFormat:@"User: %@", [rowData objectForKey:@"username"]];
    NSMutableString *gender = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"gender"]];
    cell.textLabel.text = textName;
    cell.detailTextLabel.text = gender;

    return cell;

}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    NSUInteger row = [indexPath row];
    NSDictionary *rowData = [self.userArray objectAtIndex:row];

    NSMutableString *remoteUserId = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"id"]]; //get the user ID of friend request

    self.remoteUser = remoteUserId;

    NSMutableString *messageText = [[NSString alloc] initWithFormat:@"Do You Want To Accept %@'s Friend Request", [rowData objectForKey:@"username"]];

    UIActionSheet *reportUser = [[UIActionSheet alloc] initWithTitle:messageText delegate:self cancelButtonTitle:@"No" destructiveButtonTitle:@"Yes" otherButtonTitles:nil];

    [reportUser showInView:self.parentViewController.tabBarController.view];
    [reportUser release];


    /*NSMutableString *textNumber = [[NSString alloc] initWithFormat:@"%@", [rowData objectForKey:@"number"]];
     NSString *phoneNumber = textNumber;                                       
     NSString *phoneNumberScheme = [NSString stringWithFormat:@"http://%@", phoneNumber];
     //NSlog(phoneNumberScheme);                    
     phoneNumberScheme = [phoneNumberScheme stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

     [[UIApplication sharedApplication] openURL:[NSURL URLWithString:phoneNumberScheme]];*/

    [tableView deselectRowAtIndexPath:indexPath animated:YES];

}

-(void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    if(buttonIndex != [actionSheet cancelButtonIndex])
    {
        NSLog(@"Accept Friend Request");
        [self performSelectorInBackground:@selector(AcceptFriendRequest) withObject:nil];
    }

}

-(void)AcceptFriendRequest
{

}

-(void)viewWillAppear:(BOOL)animated
{   
    self.userArray = [[NSMutableArray alloc] init];
    interestingTags = [[NSSet alloc] initWithObjects: INTERESTING_TAG_NAMES];

    [xmlData release];
    xmlData = [[NSMutableData alloc] init]; //alloc the holder for xml, may be large so we use nsmutabledata type

    NSMutableData *data = [NSMutableData data]; 

    NSString *filePath = [self dataFilePath];

    if([[NSFileManager defaultManager] fileExistsAtPath:filePath])
    {
        NSString *string = [[NSString alloc] initWithContentsOfFile:filePath];
        self.localUser = string;
        [string release];
    }

    NSString *useridString = [[NSString alloc] initWithFormat:@"userid=%@", self.localUser]; //build URL String

    [data appendData:[useridString dataUsingEncoding:NSUTF8StringEncoding]]; //build URL String

    NSURL *url = [NSURL URLWithString:@"http://www.url.com/friendrequests.php"];//url string to download

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; //request with the chosen url

    [request setHTTPMethod:@"POST"]; //http method
    [request setHTTPBody:data]; //set data of request to built URL String

    NSURLResponse *response;
    NSError *err;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err]; //start the request and store data in responseData
    NSLog(@"responseData: %@", responseData);

    xmlData = responseData; //store responseData in global variable

    [self startParsingFriendRequests];





    [super viewWillAppear:animated];
}

//***********************START PARSING***********************************

-(void)startParsingFriendRequests
{
    [self.userArray removeAllObjects];
    //NSLog(@"parsing init");
    NSXMLParser *onlineUserParser = [[NSXMLParser alloc] initWithData:xmlData]; //uses the NSMutableData data type to parse
    onlineUserParser.delegate = self; //set the delegate to this viewControlelr
    [onlineUserParser parse];
    [onlineUserParser release];
}

//called when the document is parsed
-(void)parserDidStartDocument:(NSXMLParser *)parser
{
    //NSLog(@"parsing started");
    currentElementName = nil;
    currentText = nil;
}

//this is called for each xml element
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict
{
    //NSLog(@"started element");
    if ([elementName isEqualToString:@"friend"]) //if elementName == status then start of new tweet so make new dictionary
    {
        [currentUserDict release];
        currentUserDict = [[NSMutableDictionary alloc] initWithCapacity:[interestingTags count]]; //make dictionary with two sections
    }
    else if([interestingTags containsObject:elementName]) //if current element is one stored in interesting tag, hold onto the elementName and make a new string to hold its value
    {
        currentElementName = elementName; //hold onto current element name
        currentText = [[NSMutableString alloc] init];
    }

}

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    //NSLog(@"appending");
    [currentText appendString:string];
}

//after each element it goes back to the parent after calling this method
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if([elementName isEqualToString:currentElementName])
    {
        [currentUserDict setValue: currentText forKey: currentElementName];
    }
    else if([elementName isEqualToString:@"friend"])
    {
        [self.userArray addObject:currentUserDict];

        //eventually placed in table just testing for now

    }

    [currentText release];
    currentText = nil;
}

-(void)parserDidEndDocument:(NSXMLParser *)parser
{
    [tableViewIB reloadData];
    //NSLog(@"DONE PARSING DOCUMENT");

}


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)dealloc
{
    [userArray release];
    [xmlData release];
    [remoteUser release];
    [localUser release];
    [navigationController release];
    [tableViewIB release];
    [super dealloc];
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    self.title = @"Friend Requests";
    navigationController.navigationBar.tintColor = [[UIColor alloc] initWithRed:154.0 / 255 green:188.0 / 255 blue:52.0 / 255 alpha:1.0];
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

- (void)viewDidUnload
{
    self.userArray = nil;
    self.xmlData = nil;
    self.remoteUser = nil;
    self.localUser = nil;
    self.navigationController = nil;
    self.tableViewIB = nil;

    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

-(NSString *)dataFilePath
{
    NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [path objectAtIndex:0];
    return [documentsDirectory stringByAppendingPathComponent:kFilename];
}
2011-08-26 13:07:12.972 FaceConnect[2375:207]*终止应用程序到期 未捕获异常“NSInvalidArgumentException”，原因： '-[NSConcertedData CountByEnumerating with state:objects:count:]： 已将无法识别的选择器发送到实例0x6001710' *第一次抛出时调用堆栈：（0 CoreFoundation
0x00dd55a9例外预处理+185 1 libobjc.A.dylib
0x00f29313 objc_异常_抛出+44 2 CoreFoundation
0x00dd70bb-[NSObject（NSObject）不识别选择器：][187 3
CoreFoundation 0x00d46966 uu转发+966 4芯基础0x00d46522 _CF\u转发\u准备\u 0+50 5 UIKit
0x000613fb-[UIView（层次结构） _makeSubtreePerformSelector:withObject:withObject:copySublayers:]+ 174 6 UIKit 0x0005848a -[ui视图（内部）\u添加子视图：定位：相对位置：:+3707
UIKit 0x00056aa3-[UIView（层次结构） addSubview:+57 8 UIKit 0x000b5a24 -[UITransitionView转换：fromView:toView:+563 9 UIKit
0x000b4dcd-[UITransitionView转换：toView:+129 10 UIKit
0x000ea0a7-[UITABBARC控制器 转换从ViewController:到ViewController:转换：应设置选定项：] +459 11 UIKit 0x000e8aaa -[UITabBarController从ViewController:到ViewController:的转换]+ 64 12 UIKit 0x000ea8a2 -[UITabBarController\u SETSELECTED VIEW CONTROLLER:+263 13 UIKit
0x000ea711-[UITabBarController\u tabBarItemClicked:+352 14 UIKit 0x000274fd-[UIApplication sendAction:to:from:forEvent:+119 15 UIKit 0x00229ce6-[UITabBar _sendAction:withEvent:+422 16 UIKit
0x000274fd-[UIApplication sendAction:to:from:forEvent:+119 17 UIKit 0x000b7799-[UIControl 发送操作：发送到：forEvent:+67 18 UIKit
0x000b9c2b-[UIControl（内部）\发送操作预防：带事件：]+ 527 19 UIKit 0x000b7750-[UIControl 发送控制事件的操作：+49 20 UIKit
0x000274fd-[UIApplication sendAction:to:from:forEvent:+119 21 UIKit 0x000b7799-[UIControl 发送操作：发送到：forEvent:+67 22 UIKit
0x000b9c2b-[UIControl（内部）\发送操作预防：带事件：]+ 527 23 UIKit 0x000b87d8-[UIControl touchesEnded:withEvent:+458 24 UIKit
0x0004bded-[UIWindow\u sendTouchesForEvent:+567 25 UIKit
0x0002cc37-[UIApplication sendEvent:+447 26 UIKit
0x00031f2e\u UIApplicationHandleEvent+7576 27图形服务
0x0100e992 PurpleEventCallback+1550 28芯基础
0x00db6944CFRUNLOOP\u正在调用\u OUT\u到\u SOURCE1\u PERFORM\u函数 +52 29芯基础0x00d16cf7 __CFRunLoopDoSource1+21530核心基金会
0x00d13f83\uuu CFRunLoopRun+979 31 CoreFoundation
0x00d13840 CFRunLoopRunSpecific+208 32 CoreFoundation
0x00d13761 cfrunloop运行模式+97 33图形服务
0x0100d1c4 GSEventRunModal+21734图形服务
0x0100d289 GSEventRun+115 35 UIKit
0x00035c93 UIApplicationMain+1160 36 FaceConnect
0x00002509主+121 37面连接
0x00002485 start+53）在抛出的实例后调用终止 “NSException”当前语言：自动；当前目标-c（gdb）

我认为您释放了一些无法释放的对象。
第二种观点

- (void)dealloc
{
    [super dealloc];
}
然后检查。

在您的-（void）视图中将出现：（BOOL）动画调用中，您正在调用同步URL请求，这通常是一种不好的做法，因为ViewWillDisplay是UI管理系统的一部分。同步请求是一个阻塞调用，将“冻结”UI，可能导致延迟

我在调试日志中没有看到EXC_BAD_访问，但这通常与对象释放后被访问有关

另一个需要关注的领域是您的NSXMLParser，看起来您过早地发布了它。在这种情况下，解析器正在运行，然后被释放，因此不能保证委托可能存在

-(void)startParsingOnlineUsers;
{
    NSXMLParser *idParser = [[NSXMLParser alloc] initWithData:xmlData];
    idParser.delegate = self;
    [idParser parse];
    [idParser release];
}
如果您查看NSXML解析器的类定义，它会说委托没有被保留

// delegate management. The delegate is not retained.
- (id <NSXMLParserDelegate>)delegate;

//委托管理。委托不被保留。
-（id）代表；
希望这有帮助

我现在不在Mac电脑上，所以我无法验证我的假设/想法

我认为这与以下几行有关

xmlData = responseData; //store responseData in global variable
在这里，您将xmlData指向responseData，而不是将对象内容复制到xmlData中

如果responseData自动删除，xmlData将指向不存在的内容。因此，下一次视图出现时，以下行将导致崩溃

[xmlData release];
如果我的假设是正确的，您应该使用以下代码

xmlData = [responseData mutableCopy]; //store responseData in global variable
现在出现了SIGABRT，一个错误日志更新了我的问题。我看过你的代码，但我没有通过枚举找到方法countByEnumeratingWithState:objects:count:在你的项目中找到这个方法。这是一个问题。我的代码中不存在该方法。我这辈子从没见过。你在代码中的任何地方都释放了一些对象。请找到并评论该代码。同意该非保留建议。有几次也有同样的问题