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Iphone 如何在UITableView上添加UIActivityIndicator_Iphone_Objective C_Ios - Fatal编程技术网

Iphone 如何在UITableView上添加UIActivityIndicator

Iphone 如何在UITableView上添加UIActivityIndicator,iphone,objective-c,ios,Iphone,Objective C,Ios,我想尝试UIActivityIndicator和UITableView当iphone上第一次加载表时,活动必须开始闪烁,当iphone上的表完全加载时,当我单击“加载更多单元格”时,我还想在加载更多行时显示活动闪烁。请告诉我如何做到这一点如果您自己完成此代码,请提前感谢 #import "RootViewController.h" #import "Tweet.h" @implementation RootViewController @synthesize customImage,pag

我想尝试
UIActivityIndicator
UITableView
当iphone上第一次加载表时,活动必须开始闪烁,当iphone上的表完全加载时,当我单击“加载更多单元格”时,我还想在加载更多行时显示活动闪烁。请告诉我如何做到这一点如果您自己完成此代码,请提前感谢

#import "RootViewController.h"
#import "Tweet.h"


@implementation RootViewController

@synthesize customImage,pagecontrol,cell;//indexPath;

#pragma mark -
#pragma mark View lifecycle


- (void)viewDidLoad 
{
    pageSize = 2;

       // totalpages =(NSInteger) (xmlParser.tweets)/5 ;
    xmlParser = [[XMLParser alloc] loadXMLByURL:@"http://api.twitter.com/1/statuses/user_timeline/KentFranks.xml"];


    [super viewDidLoad];

    self.title = @"Tweets";

}





#pragma mark -
#pragma mark Table view data source


- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 
{
    return 1;
}



- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{
    if([xmlParser.tweets count]>pageSize)
    {
        return pageSize+1;
    }
    return  xmlParser.tweets.count;
    }



- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{

    static NSString *CellIdentifier = @"Cell";

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

    }


    //UIImage    *twitterLogo = [[UIImage imageNamed:@"twitter-logo.png"]autorelease];

    NSString *imagepath = [[NSBundle mainBundle] pathForResource:@"twitter-logo" ofType:@"png"];

    UIImage *image =[[ UIImage alloc] initWithContentsOfFile:imagepath];
    cell.imageView.image = image;



    cell.detailTextLabel.text= @"Add Subtitle here";

    Tweet *currentTweet = [[xmlParser tweets] objectAtIndex:indexPath.row];
    if(indexPath.row<pageSize)

    {
        cell.textLabel.text = currentTweet.content;
    }

    else
    {


cell.textLabel.text = @"Load more ";
}


        NSLog(@"cell: %@",cell);
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    return cell;


}

-(IBAction)loadmorebutton:(id)sender;
{

    NSIndexPath *currentPath = [self.tableView indexPathForSelectedRow];
    NSIndexPath *nextPath = [NSIndexPath indexPathForRow:currentPath.row+1 inSection:currentPath.section];
    [self.tableView selectRowAtIndexPath:nextPath animated:YES scrollPosition:UITableViewScrollPositionMiddle];
}


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


    if (indexPath.row==pageSize) 
    {
        pageSize=pageSize+2;
        [tableView reloadData];

    }

}

/*
 -(IBAction)pagecontrol:(UIPageControl *)pageControl
 {
    [self.tableView reloadData];
}
 -(IBAction)Pageindexchanges:(id)sender
{
    NSLog(@"clicked page index: %i ",pagecontrol.currentPage);

}
*/
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 55;
}

#pragma mark -
#pragma mark Table view delegate

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

}
*/

#pragma mark -
#pragma mark Memory management

- (void)didReceiveMemoryWarning 
{

    [super didReceiveMemoryWarning];

}

- (void)viewDidUnload 
{

}


- (void)dealloc 
{
    [xmlParser release];
    [super dealloc];
}


@end
#导入“RootViewController.h”
#导入“Tweet.h”
@RootViewController的实现
@合成自定义图像、页面控件、单元格//索引;
#布拉格标记-
#pragma标记视图生命周期
-(无效)viewDidLoad
{
页面大小=2;
//totalpages=(NSInteger)(xmlParser.tweets)/5;
xmlParser=[[xmlParser alloc]loadXMLByURL:@”http://api.twitter.com/1/statuses/user_timeline/KentFranks.xml"];
[超级视图下载];
self.title=@“Tweets”;
}
#布拉格标记-
#pragma标记表视图数据源
-(NSInteger)表格视图中的节数:(UITableView*)表格视图
{
返回1;
}
-(NSInteger)表视图:(UITableView*)表视图行数节:(NSInteger)节
{
if([xmlParser.tweets count]>pageSize)
{
返回页面大小+1;
}
返回xmlParser.tweets.count;
}
-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
静态NSString*CellIdentifier=@“Cell”;
cell=[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
如果(单元格==nil){
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle重用标识符:CellIdentifier]自动释放];
}
//UIImage*twitterLogo=[[UIImage ImageName:@“twitter logo.png”]自动删除];
NSString*imagepath=[[NSBundle mainBundle]pathForResource:@“twitter logo”类型:@“png”];
UIImage*image=[[UIImage alloc]initWithContentsOfFile:imagepath];
cell.imageView.image=图像;
cell.detailTextLabel.text=@“在此处添加字幕”;
Tweet*currentTweet=[[xmlParser tweets]objectAtIndex:indexath.row];

如果(indexPath.row尝试此代码,可能会对您有所帮助

将微调器直接添加到单元格视图中感觉有点粗糙,因此我使用1x1透明png作为图像视图,并将其大小调整为我的微调器大小:

UITableViewCell *cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"NoReuse"] autorelease];
cell.textLabel.text = @"Loading...";

UIActivityIndicatorView *spinner = [[[UIActivityIndicatorView alloc] 
     initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray] autorelease];

// Spacer is a 1x1 transparent png
UIImage *spacer = [UIImage imageNamed:@"spacer"];

UIGraphicsBeginImageContext(spinner.frame.size);

[spacer drawInRect:CGRectMake(0,0,spinner.frame.size.width,spinner.frame.size.height)];
UIImage* resizedSpacer = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();
cell.imageView.image = resizedSpacer;
[cell.imageView addSubview:spinner];
[spinner startAnimating];

return cell;
这将生成一个如下所示的单元格:

这可能会对您有所帮助

第二个选择是


我有问题,我只想在我单击的单元格上显示活动指示器,它必须停止在我已单击的单元格上设置动画。但在您的代码中,它仍在我单击的每个单元格上设置动画。请解决此问题。在未选中时,您可以通过单击任何索引来停止动画。行单元格选举