Iphone 从表中推送不同的视图

我一直在遵循一个教程来实现搜索栏

然而，我似乎无法提出不同的观点。这是我的DidsElectroWatineXpath看起来的样子

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *selectedCountry = nil;

if(searching)
    selectedCountry = [copyListOfItems objectAtIndex:indexPath.row];
else {

    NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
    NSArray *array = [dictionary objectForKey:@"Countries"];
    selectedCountry = [array objectAtIndex:indexPath.row];
}

//Initialize the detail view controller and display it.
if ([[listOfItems  objectAtIndex:indexPath.row] isEqual:@"neon"]){
Neon *abo = [[Neon alloc] initWithNibName:@"Neon" bundle:nil];
//dvController.selectedCountry = selectedCountry;
[self.navigationController pushViewController:abo animated:YES];
[abo release];
}

}

下面是我单击neon时的调试程序消息： 2010-05-09 08:47:27.516 iTeachU[3821:307]*由于未捕获的异常“NSRangeException”而终止应用程序，原因：“*-[NSMutableArray objectAtIndex::]：索引60超出边界[0..0]” ***第一次抛出时调用堆栈： 在抛出“NSException”实例后调用terminate 程序收到信号：“SIGABRT”

如果任何人有一个方法来推动基于单元格文本的看法，它将非常感谢。谢谢

编辑整个.m

- (void)viewDidLoad {
[super viewDidLoad];
listOfItems = [[NSMutableArray alloc] init];

NSArray *ElementsArray = [NSArray arrayWithObjects:@"Actinium",
                          @"Aluminium",
                          @"Americium",
                          @"Antimony",
                          @"Argon",
                          @"Arsenic",
                          @"Astatine",
                          @"Barium",
                          @"Berkelium", 
                          @"Beryllium",
                          @"Bismuth",
                          @"Bohrium",
                          @"Boron",
                          @"Bromine",
                          @"Cadmium",
                          @"Cesium",
                          @"Calcium",
                          @"Californium",
                          @"Carbon",
                          @"Cerium",
                          @"Chlorine",
                          @"Chromium",
                          @"Cobalt",
                          @"Copper",
                          @"Curium",
                          @"Darmstadtium",
                          @"Dubnium",
                          @"Dysprosium",
                          @"Einsteinium", 
                          @"Erbium",
                          @"Europium",
                          @"Fermium",
                          @"Fluorine",
                          @"Francium",
                          @"Gadolinium",
                          @"Gallium",
                          @"Germanium",
                          @"Gold",
                          @"Hafnium",
                          @"Hassium",
                          @"Helium",
                          @"Holmium",
                          @"Hydrogen",
                          @"Indium",
                          @"Iodine",
                          @"Iridium",
                          @"Iron",
                          @"Krypton",
                          @"Lanthanum",
                          @"Lawrencium",
                          @"Lead",
                          @"Lithium",
                          @"Lutetium",
                          @"Magnesium",
                          @"Manganese",
                          @"Meitnerium",
                          @"Mendelevium",
                          @"Mercury",
                          @"Molybdenum",
                          @"Neodymium",
                          @"neon",
                          @"Neptunium",
                          @"Nickel", 
                          @"Niobium",
                          @"Nitrogen",
                          @"Nobelium",
                          @"Osmium",
                          @"Oxygen", 
                          @"Palladium",
                          @"Phosphorus",
                          @"Platinum",
                          @"Plutonium",
                          @"Polonium",
                          @"Potassium ",
                          @"Praseodymium",
                          @"Promethium",
                          @"Protactinium", 
                          @"Radium", 
                          @"Radon",
                          @"Rhenium",
                          @"Rhodium",
                          @"Roentgenium",
                          @"Rubidium", 
                          @"Ruthenium",
                          @"Rutherfordium",
                          @"Samarium", 
                          @"Scandium",
                          @"Seaborgium", 
                          @"Selenium",
                          @"Silicon", 
                          @"Silver",
                          @"Sodium", 
                          @"Strontium",
                          @"Sulfur",
                          @"Tantalum",
                          @"Technetium",
                          @"Tellurium",
                          @"Terbium",
                          @"Thallium",
                          @"Thorium",
                          @"Thulium",
                          @"Tin",
                          @"Titanium",
                          @"Tungsten",
                          @"Ununbium",
                          @"Ununhexium",
                          @"Ununoctium",
                          @"Ununpentium",
                          @"Ununquadium", 
                          @"Ununseptium",
                          @"Ununtrium",
                          @"Uranium",
                          @"Vanadium",
                          @"Xenon", 
                          @"Ytterbium",
                          @"Yttrium",
                          @"Zinc",
                          @"Zirconium", nil];
NSDictionary *ElementsDict = [NSDictionary dictionaryWithObject:ElementsArray     forKey:@"Elements"];


[listOfItems addObject:ElementsDict];

//Initialize the copy array.
copyListOfItems = [[NSMutableArray alloc] init];

//Set the title
self.navigationItem.title = @"Elements";

//Add the search bar
self.tableView.tableHeaderView = searchBar;
searchBar.autocorrectionType = UITextAutocorrectionTypeNo;

searching = NO;
letUserSelectRow = YES;
}

-(IBAction) back:(id)sender{
[self.navigationController popViewControllerAnimated:NO];   
}
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}



#pragma mark -
#pragma mark Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

if (searching)
    return 1;
else
    return [listOfItems count];
}



- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

if (searching)
    return [copyListOfItems count];
else {

    //Number of rows it should expect should be based on the section
    NSDictionary *dictionary = [listOfItems objectAtIndex:section];
    NSArray *array = [dictionary objectForKey:@"Elements"];
    return [array count];
}
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {

if(searching)
    return @"Search Results";

if(section == 0)
    return @"Elements";
}

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}

// Configure the cell...

if(searching) 
    cell.text = [copyListOfItems objectAtIndex:indexPath.row];
else {

    //First get the dictionary object
    NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
    NSArray *array = [dictionary objectForKey:@"Elements"];
    NSString *cellValue = [array objectAtIndex:indexPath.row];
    cell.text = cellValue;
}

return cell;
}

- (NSIndexPath *)tableView :(UITableView *)theTableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {

if(letUserSelectRow)
    return indexPath;
else
    return nil;
}


- (void) searchBarTextDidBeginEditing:(UISearchBar *)theSearchBar {

//This method is called again when the user clicks back from teh detail view.
//So the overlay is displayed on the results, which is something we do not want to happen.
if(searching)
    return;

//Add the overlay view.
if(ovController == nil)
    ovController = [[OverlayViewController alloc] initWithNibName:@"OverlayView" bundle:[NSBundle mainBundle]];

CGFloat yaxis = self.navigationController.navigationBar.frame.size.height;
CGFloat width = self.view.frame.size.width;
CGFloat height = self.view.frame.size.height;

//Parameters x = origion on x-axis, y = origon on y-axis.
CGRect frame = CGRectMake(0, yaxis, width, height);
ovController.view.frame = frame;    
ovController.view.backgroundColor = [UIColor grayColor];
ovController.view.alpha = 0.5;

ovController.rvController = self;

[self.tableView insertSubview:ovController.view aboveSubview:self.parentViewController.view];

searching = YES;
letUserSelectRow = NO;
self.tableView.scrollEnabled = NO;

//Add the done button.
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] 
                                           initWithBarButtonSystemItem:UIBarButtonSystemItemDone 
                                           target:self action:@selector(doneSearching_Clicked:)] autorelease];
}

- (void)searchBar:(UISearchBar *)theSearchBar textDidChange:(NSString *)searchText {

//Remove all objects first.
[copyListOfItems removeAllObjects];

if([searchText length] > 0) {

    [ovController.view removeFromSuperview];
    searching = YES;
    letUserSelectRow = YES;
    self.tableView.scrollEnabled = YES;
    [self searchTableView];
}
else {

    [self.tableView insertSubview:ovController.view aboveSubview:self.parentViewController.view];

    searching = NO;
    letUserSelectRow = NO;
    self.tableView.scrollEnabled = NO;
}

[self.tableView reloadData];
}

- (void) searchBarSearchButtonClicked:(UISearchBar *)theSearchBar {

[self searchTableView];
}

- (void) searchTableView {

NSString *searchText = searchBar.text;
NSMutableArray *searchArray = [[NSMutableArray alloc] init];

for (NSDictionary *dictionary in listOfItems)
{
    NSArray *array = [dictionary objectForKey:@"Elements"];
    [searchArray addObjectsFromArray:array];
}

for (NSString *sTemp in searchArray)
{
    NSRange titleResultsRange = [sTemp rangeOfString:searchText options:NSCaseInsensitiveSearch];

    if (titleResultsRange.length > 0)
        [copyListOfItems addObject:sTemp];
}

[searchArray release];
searchArray = nil;
}

- (void) doneSearching_Clicked:(id)sender {

searchBar.text = @"";
[searchBar resignFirstResponder];

letUserSelectRow = YES;
searching = NO;
self.navigationItem.rightBarButtonItem = nil;
self.tableView.scrollEnabled = YES;

[ovController.view removeFromSuperview];
[ovController release];
ovController = nil;

[self.tableView reloadData];
}

//替代以支持编辑表格视图。 -（void）tableView:（UITableView*）tableView提交的编辑样式：（UITableViewCellEditingStyle）行的编辑样式索引路径：（NSIndexPath*）索引路径{

if (editingStyle == UITableViewCellEditingStyleDelete) {
    // Delete the row from the data source
    [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES];
}   
else if (editingStyle == UITableViewCellEditingStyleInsert) {
    // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}   

} */

---

由于不太了解您的代码，我无法告诉您确切的问题，但是：

在顶部，您可以根据

搜索

的值来区分两个不同的数组。稍后，您将只使用当

搜索

为false时使用的数组，该数组具有相同的索引，它似乎是

NSDictionary

s的数组，而不是

NSString

s的数组。您似乎第一次使用

indexPath.section

访问它，第二次使用

indexPath.row

访问它

我特别要说的是这一行：

if ([[listOfItems  objectAtIndex:indexPath.row] isEqual:@"neon"]){

基于前面的代码，即此行：

NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];

---

我猜

listOfItems

包含的项目数等于表视图中的节数，而不是单击的节中的行数，我还猜返回值永远不会等于

@“neon”

因为它是一个

NSDictionary

根据您得到的异常，您正在调用

objectAtIndex:

，值为60，并且

NSMutableArray

中没有任何内容（范围0..0）。在使用推送代码之前，需要先解决此问题

当异常发生时，您应该能够从调试器中的调用堆栈中判断正在访问哪个数组，或者您可以在执行objectAtIndex:之前添加NSLog以查看您有什么。例如，您有：

if ([[listOfItems  objectAtIndex:indexPath.row] isEqual:@"neon"]){

如果在上面一行之前添加下一行，您将能够看到您试图访问的索引（indexath.row）以及ListoItems中实际有多少索引：

NSLog(@"listOfItems has %d, accessing %d", [listOfItems count], indexPath.row);

---

任何想知道的人都可以使用此代码解决。 -（void）tableView:（UITableView*）tableView未选择RowatineXpath:（NSIndexPath*）indexPath{ NSString*selectedCountry=nil

if(searching)
    selectedCountry = [copyListOfItems objectAtIndex:indexPath.row];
else {

    NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
    NSArray *array = [dictionary objectForKey:@"Elements"];
    selectedCountry = [array objectAtIndex:indexPath.row];
}

//Initialize the detail view controller and display it.
NSLog(@"listOfItems has %d, accessing %d", [listOfItems count], indexPath.row);
NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:@"Elements"];
NSString *cellValue = [array objectAtIndex:indexPath.row];

if ([cellValue isEqual:@"neon"]){
    NSLog(@"Neon");
    Neon *abo = [[Neon alloc] initWithNibName:@"Neon" bundle:nil];
    [self.navigationController pushViewController:abo animated:YES];
    NSLog(@"Neon Worked");
    [abo release];
}

---

}

我添加了课程的其余部分作为编辑。我还是看不到要推的视图。通过提供的代码，您可以看到任何可以获得新视图的内容吗？如果唯一条目使用键“Elements”，您希望这个“Countries”数组来自哪里？它已更改为Elements。选择或推送过程中未发生任何更改。感谢您的回复。我点击了第三项，得到了：2010-05-09 19:43:49.392 iTeachU[4674:307]listOfItems有1个，访问3有没有办法告诉我使用第3行或类似的方式推送视图？你问错了问题。您应该问，为什么列表项中只有一项？如果这些答案中的任何一个解决了你的问题，或者有助于引导你朝正确的方向前进，那么最好选择一个，或者如果它们有帮助的话，就投上一票。问题的解决是因为它推动了这一观点。但是，搜索栏使用视图的副本。我可以让copyListItems和listItems只推送一个视图。选择“其他”将强制应用程序崩溃。我仍然需要一种方法来推送所有视图。通过声明一个字符串并设置isEqual，包括搜索在内的所有视图都可以使用。您的nslog代码有帮助。我将把它标记为答案，因为它引导我走上正确的道路。谢谢你的帮助。

if(searching)
    selectedCountry = [copyListOfItems objectAtIndex:indexPath.row];
else {

    NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
    NSArray *array = [dictionary objectForKey:@"Elements"];
    selectedCountry = [array objectAtIndex:indexPath.row];
}

//Initialize the detail view controller and display it.
NSLog(@"listOfItems has %d, accessing %d", [listOfItems count], indexPath.row);
NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:@"Elements"];
NSString *cellValue = [array objectAtIndex:indexPath.row];

if ([cellValue isEqual:@"neon"]){
    NSLog(@"Neon");
    Neon *abo = [[Neon alloc] initWithNibName:@"Neon" bundle:nil];
    [self.navigationController pushViewController:abo animated:YES];
    NSLog(@"Neon Worked");
    [abo release];
}