我开发了一个广播应用程序,它正在运行。
我想放置一个活动指示器视图,以便在您触摸播放时启动活动指示器视图,当音频开始时,活动指示器将停止。
答案 0 :(得分:9)
这会将活动视图添加到视图的中心。在“IBAction”中添加此代码,您可以在其中处理播放按钮。
UIActivityIndicatorView *activityView=[[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
activityView.center=self.view.center;
[activityView startAnimating];
[self.view addSubview:activityView];
[self.view userInteractionEnabled:NO]; //to avoid touch events when activity is on
并停止使用活动指标
[activityView stopAnimating];
[activityView removeFromSuperview];
[self.view userInteractionEnabled:YES];
这是this link about AV Foundation。和this answer - >
使用KVO,可以通知玩家状态的变化:
player = [AVPlayer playerWithURL:fileURL];
[player addObserver:self forKeyPath:@"status" options:0 context:nil];
在 PLAY按钮的事件中添加代码以启动UIActivityIndicator
状态更改时将调用此方法:
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
change:(NSDictionary *)change context:(void *)context {
if (object == player && [keyPath isEqualToString:@"status"]) {
if (player.status == AVPlayerStatusReadyToPlay) {
//DISABLE THE UIACTIVITY INDICATOR HERE
} else if (player.status == AVPlayerStatusFailed) {
// something went wrong. player.error should contain some information
}
}
}