Ios 以编程方式将活动指示器添加到视图

可能重复：

全部,

在我的AppDelegate中，我创建了一个使用我的Default.png的动画启动视图。一切正常，但我不知道如何让我的ActivityIndicator显示在启动视图的顶部。它就在那里，就在飞溅的景色下。这是我所拥有的，谢谢你：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
 //... data access stuff here ...

 self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];

// ... more setup stuff here ...



/****************************************************************************
 *
 *
 * Splash Screen for iPhone
 *
 ****************************************************************************/
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {


    splashView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0, 320, 480)];
    splashView.image = [UIImage imageNamed:@"Default.png"];
    [self.window addSubview:splashView];
    [self.window bringSubviewToFront:splashView];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    [UIView setAnimationTransition:UIViewAnimationTransitionNone forView:self.window cache:YES];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(startupAnimationDone:finished:context:)];
    splashView.alpha = 0.0;
    splashView.frame = CGRectMake(-60, -60, 440, 600);
    [UIView commitAnimations];


    //Create and add the Activity Indicator to splashView
    UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    activityIndicator.alpha = 1.0;
    activityIndicator.center = CGPointMake(160, 240);
    activityIndicator.hidesWhenStopped = NO;
    [splashView addSubview:activityIndicator];
    [activityIndicator startAnimating];



}


  return YES;
}

看起来你在0.5秒内隐藏了（alpha->0.0）你的splashView。在这种情况下，您应该看到什么？

您是否尝试过：

[splashView bringSubviewToFront:activityIndicator];

---

对于所有需要这个的人，我知道有很多…
（在Xcode版本4.2.1上制作）

所以

在AppDelegate.h中添加以下内容：

@property (nonatomic, strong) UIImageView *splashView;

在AppDelegate.m中添加以下内容：

@property (nonatomic, strong) UIImageView *splashView;

在cours@View页面顶部
然后：

- (void) splashFade
{
    splashView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0, 320, 480)];
    splashView.image = [UIImage imageNamed:@"Default.png"];
    [_window addSubview:splashView];
    [_window bringSubviewToFront:splashView];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:2.0];
    [UIView setAnimationDelay:2.5];
    [UIView setAnimationTransition:UIViewAnimationTransitionNone forView:_window cache:YES];
    [UIView setAnimationDelegate:self]; 
    [UIView setAnimationDidStopSelector:@selector(startupAnimationDone:finished:context:)];
    splashView.alpha = 0.0;
    [UIView commitAnimations];

    //Create and add the Activity Indicator to splashView
    UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
    activityIndicator.alpha = 1.0;
    activityIndicator.center = CGPointMake(160, 360);
    activityIndicator.hidesWhenStopped = NO;
    [splashView addSubview:activityIndicator];
    [activityIndicator startAnimating];
}

- (void)startupAnimationDone:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
    [splashView removeFromSuperview];
}

[UIView setAnimationDelay:2.5]由您选择的延迟时间决定splashView在前面的时间长度

您可以通过在以下位置更改x/y的数值来更改指示器的位置：
activityIndicator.center=CGPointMake（160360）

最后，在该方法下：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

只需添加以下内容：

[self performSelector:@selector(splashFade) withObject:nil];

接下来就是：）
希望有帮助

---

有一个很好的编程…

是的。得到同样的结果。问题可能是splashView是UIImageView。我听说有时候将子视图放在UIImageViews的顶部是不起作用的，这给了我从splashView到主视图的一个很好的过渡。当我注释它时，我仍然得到相同的结果-ActivityIndicator隐藏在splashViewHi后面（void）startupAnimationDone:（NSString*）animationID finished:（NSNumber*）finished context:（void*）contexthidesWhenStopped=否对我来说是关键，否则它将被隐藏