ios 以编程方式向视图添加活动指示器
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Adding an Activity Indicator Programmatically to a View
提问by Slinky
Possible Duplicate:
Show activity indicator during application launch
可能的重复：
在应用程序启动期间显示活动指示器
All,
全部，
Inside my app delegate, I created an animated splash view that uses my Default.png. That all works OK but I cannot figure out how get my ActivityIndicator to display on top of the splash view. It's there just hidden by the splash view. Here is what I have and thanks:
在我的应用程序委托中，我创建了一个使用我的 Default.png 的动画初始视图。一切正常，但我不知道如何让我的 ActivityIndicator 显示在初始视图之上。它只是隐藏在飞溅视图中。这是我所拥有的，谢谢：
- (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;
}
回答by Maor Zohar
For all those who needed this, and i know there were many...
(Made on Xcode version 4.2.1)
对于所有需要这个的人，我知道有很多......
（在 Xcode 4.2.1 版上制作）
So...
所以...
In the AppDelegate.h add this:
在 AppDelegate.h 中添加：
@property (nonatomic, strong) UIImageView *splashView;
In the AppDelegate.m add this:
在 AppDelegate.m 中添加：
On the top of the page of cours @synthesize splashView;
And then:
在 cours @synthesize splashView 的页面顶部；
进而：
- (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];
}
The [UIView setAnimationDelay:2.5]is responsible for how long the splashView will be in front by the delay time you choose.
在[UIView的setAnimationDelay：2.5]负责splashView有多长在前面由您选择的延迟时间。
You can change the position of the indicator by changing the nubmers of x/y in:
activityIndicator.center = CGPointMake(160, 360);
您可以通过更改 x/y 中的数字来更改指标的位置：
activityIndicator.center = CGPointMake(160, 360);
At last, under the methode:
最后，在方法下：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
Just add this:
只需添加这个：
[self performSelector:@selector(splashFade) withObject:nil];
And there you go :)
Hope it helped.
你去:)
希望它有所帮助。
Have a nice programming....
有一个很好的编程....
回答by NeverBe
Seems you hiding (alpha -> 0.0) your splashView in 0.5sec. What you should see in this case?
似乎您在 0.5 秒内隐藏了（alpha -> 0.0）您的 splashView。在这种情况下你应该看到什么？
回答by jonkroll
Have you tried:
你有没有尝试过：
[splashView bringSubviewToFront:activityIndicator];
