无法逐个显示UIImage

Question

从今天早上开始我就有点困了。。。我正试图加载一个又一个图像，但是。。。它不起作用。。。我甚至没有显示我的第一张照片。。。

这是我的代码：

- (void) checkResources
{
    NSString *bundleRoot = [[NSBundle mainBundle] bundlePath];
    NSFileManager *manager = [NSFileManager defaultManager];
    NSDirectoryEnumerator *direnum = [manager enumeratorAtPath:bundleRoot];

    NSString *cuttedName;
    NSString *cuttedName1;

  for (NSString *path in direnum)
    {
        if ([[path pathExtension] isEqualToString:@"mp4"])
        {
            cuttedName1 = [path stringByReplacingOccurrencesOfString:@"ressources/" withString:@""];
            cuttedName = [cuttedName1 stringByReplacingOccurrencesOfString:@".mp4" withString:@""];
            if ([cuttedName isEqualToString:[NSString stringWithFormat:@"%d", num]]) 
            {
                NSString *media = [NSString stringWithFormat:@"%@/%@", bundleRoot, path];
                [self startSlideShow:media];
            }
        }
        else if ([[path pathExtension] isEqualToString:@"mov"])
        {
            cuttedName1 = [path stringByReplacingOccurrencesOfString:@"ressources/" withString:@""];
            cuttedName = [cuttedName1 stringByReplacingOccurrencesOfString:@".mov" withString:@""];
            if ([cuttedName isEqualToString:[NSString stringWithFormat:@"%d", num]]) 
            {
                NSString *media = [NSString stringWithFormat:@"%@/%@", bundleRoot, path];
                [self startSlideShow:media];
            }
        }
        else  if ([[path pathExtension] isEqualToString:@"png"])
        {
            cuttedName1 = [path stringByReplacingOccurrencesOfString:@"ressources/" withString:@""];
            cuttedName = [cuttedName1 stringByReplacingOccurrencesOfString:@".png" withString:@""];
            if ([cuttedName isEqualToString:[NSString stringWithFormat:@"%d", num]]) 
            {
                NSString *media = [NSString stringWithFormat:@"%@/%@", bundleRoot, path];
                num++;
            [self startImage:media];
            }
        }
    }
}
- (void) startImage:(NSString *)nameFile
{
    CGRect myImageRect = CGRectMake(0, 0, 200, 500);
    UIImageView *imageView;
    imageView = [[UIImageView alloc] initWithFrame:myImageRect];
    [imageView setImage:[UIImage imageNamed:@"0.png"]];
    NSLog(@"IAMGE %@", imageView.image);
    [self.view addSubview:imageView];
    [self performSelector:@selector(checkResources) withObject:nil afterDelay:10]; // this will give time for UI to update itself.. 
    [imageView release];
    }
- (void) startSlideShow:(NSString *)nameFile
{    
    NSURL *url = [NSURL fileURLWithPath:nameFile];//[[NSBundle mainBundle] pathForResource:@"2" ofType:@"mov"]];


    MPMoviePlayerController *moviePlayer = 
    [[MPMoviePlayerController alloc] initWithContentURL:url];
   // NSLog(@" URL : %@", url);
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlayBackDidFinish:)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:moviePlayer];
    moviePlayer.view.frame = CGRectMake(0, 0, 500, 600);
    moviePlayer.controlStyle = MPMovieControlStyleDefault;
    moviePlayer.shouldAutoplay = YES;
    [self.view addSubview:moviePlayer.view];
    [moviePlayer setFullscreen:YES animated:YES];
   }

-(void)moviePlayBackDidFinish: (NSNotification*)notification
{ 
    MPMoviePlayerController *moviePlayer = [notification object];
    [[NSNotificationCenter defaultCenter] removeObserver:self      
                                                    name:MPMoviePlayerPlaybackDidFinishNotification
                                                  object:moviePlayer];
    if ([moviePlayer respondsToSelector:@selector(setFullscreen:animated:)])
    {
       // [moviePlayer.view removeFromSuperview];
    }

    //[[moviePlayer release] addAnimation:animation forKey:kCATransition];

    num++;
    [self checkResources];
}

不要介意我的代码的目标：）我只想显示uiimage，然后在显示第一个图像后调用checkResources方法时，我将发送给startImage另一个图像。

Answer 1

代码中可能存在的两个主要问题。。没有其他问题了。

1） 由于连续的addSubview方法，您的UI不会更新。。

2） 您的UIImage为null。。

检查1）

更改

[self checkResources];

至

[self performselector:@selector(checkResources) withObject:nil afterDelay:3] // this will give time for UI to update itself.. 

对以上代码使用"自动完成"。。。可能是拼写错误。。

检查2）

简称NSlog imageview.image。。这将判断图像视图图像是否为空。。

Answer 2

如果这是你的真实代码，那么你就有一个无限循环。一个方法调用另一个。。否则：问题出在哪里？