iphone - 完成后从 viewDidLoad 中移除动画

Question

我有一个动画(图像数组)，我将其放入 viewDidLoad 中，因为我希望它在开始后立即播放。在 viewDidLoad 中的动画之后，我还在 UIWebView 中显示了一个我想保留的 webview。动画播放(出于某种原因不是我创建的 UIImage )但完成后我无法摆脱它。我试过放入一个计时器并从 super View 中删除动画，但它没有删除它，而是退出了应用程序并返回到主页。

-(void)viewDidLoad
{
    UIImage *first = [UIImage imageNamed:@"panda1.png"];
    animation = [[UIImageView alloc] initWithImage:first];
    animation.animationImages = [NSArray arrayWithObjects: first,
                                     [UIImage imageNamed:@"panda2.png"], 
                                     [UIImage imageNamed:@"panda3.png"], nil];

    animation.animationRepeatCount = 4;
    animation.animationDuration = 2;
    [animation startAnimating];

    [self.view addSubview:animation];

    //set timer to remove animation from view
    NSTimer *timer;
    timer =  [NSTimer scheduledTimerWithTimeInterval: 3
                          target: self
                        selector: @selector(removeAnimation:)
                        userInfo: nil
                         repeats: NO];

  //for loading the image at start up
  NSString *urlAddress = @"http://projects.seng.uvic.ca/most_recent.php";
  NSURL *url = [NSURL URLWithString:urlAddress];
  NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];

  //load the request in the UIWebView
  [webView loadRequest:requestObj];

//removes the animation from subview
- (void) method: (NSTimer*) theTimer
{
   [animation release];
   [animation removeFromSuperview];
}

Answer 1

看起来您选择的选择器 (removeAnimation:) 和您显示的方法 (method:) 的名称不同。

一个更简单的方法是做这样的事情:

-(void)viewDidLoad
{
    UIImage *first = [UIImage imageNamed:@"panda1.png"];
    animation = [[UIImageView alloc] initWithImage:first];
    animation.animationImages = [NSArray arrayWithObjects: first,
                                     [UIImage imageNamed:@"panda2.png"], 
                                     [UIImage imageNamed:@"panda3.png"], nil];

    animation.animationRepeatCount = 4;
    animation.animationDuration = 2;
    [animation startAnimating];

    [self.view addSubview:animation];
    [self performSelector:@selector(removeAnimation) withObject:nil afterDelay:8.0];


    //for loading the image at start up
    NSString *urlAddress = @"http://projects.seng.uvic.ca/most_recent.php";
    NSURL *url = [NSURL URLWithString:urlAddress];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];

    //load the request in the UIWebView
    [webView loadRequest:requestObj];
}

- (void)removeAnimation
{
    [animation removeFromSuperview];
    [animation release];
}

大家好，我是 Pandas 。