iphone - 电影播放完毕后在电影播放器​​中显示控件

Question

我想在电影结束时显示电影播放器​​控件，所以我将观察者添加到 NSNotificationCenter :

- (void)movieFinishedCallback:(NSNotification*)aNotification
{
    // Obtain the reason why the movie playback finished
    NSNumber *finishReason = [[aNotification userInfo] objectForKey:MPMoviePlayerPlaybackDidFinishReasonUserInfoKey];

    if ([finishReason intValue] == 0)
    {
        [self showControls];
    }

   // Handle other reasons 
}


- (void)showControls
{
    for(id views in [[[self.playerVC moviePlayer] view] subviews]){
        for(id subViews in [views subviews]){
            for (id controlView in [subViews subviews]){
                [controlView setAlpha:1.0];
                [controlView setHidden:NO];
            }
        }
    }
}

直到现在一切都运行良好并且出现了控件，但是当我点击屏幕以隐藏它们时，控件消失并很快再次出现(类似于闪光灯)，然后我需要再次点击查看隐藏控件..

有人知道我为什么遇到这个问题吗？或者有另一个想法在视频结束时显示控件？

Answer 1

首先调试并打印MPMoviePlayerView的 subview ，记下 subview ，找到控件 View 的名称。

这是我在我的应用程序中进行的调试。

Printing description of subViews:
<MPVideoContainerView: 0x7f936950f6e0; frame = (0 0; 375 667); autoresize = W+H; layer = <CALayer: 0x7f936950fa30>>
Printing description of controlView:
<MPVideoPlaybackOverlayView: 0x7f9369659a70; frame = (0 0; 375 667); alpha = 0; hidden = YES; autoresize = W+H; tag = 1004; layer = <CALayer: 0x7f93696c4710>>
Printing description of subViews:
<MPVideoContainerView: 0x7f936950f6e0; frame = (0 0; 375 667); autoresize = W+H; layer = <CALayer: 0x7f936950fa30>>
Printing description of views:
<MPSwipableView: 0x7f9369510290; frame = (0 0; 375 667); autoresize = W+H; gestureRecognizers = <NSArray: 0x7f9369510d30>; layer = <CALayer: 0x7f9369510620>>

然后我检查了控件 View 的名称并将其从播放器中删除。将其设置为隐藏。

- (void)hideControls
{
    for(id views in [[player view] subviews]){
        for(id subViews in [views subviews]){
            for (id controlView in [subViews subviews]){
                if ( [controlView isKindOfClass:NSClassFromString(@"MPVideoPlaybackOverlayView")] ) {
                    [controlView setAlpha:0.0];
                    [controlView setHidden:YES];
                }
            }
        }
    }
}