Question

我希望能够使用MPMoviePlayerController的标准控件使我的自定义控件显示和消失。什么是最好的方法？

谢谢，

罗布

Answer 1

我相信我找到了解决方案。如果其他人需要这个功能，这就是我如何使用它：

我使用我找到的代码here在MPMoviePlayer视图数组中查找MPInlineVideoOverlay子视图。然后我按如下方式对其进行了修改：


- (void)observeValueForKeyPath:(NSString *)keyPath 
                          ofObject:(id)object 
                            change:(NSDictionary *)change 
                           context:(void *)context {

    float newValue = 0;
    if([change objectForKey:NSKeyValueChangeNewKey] != [NSNull null]) 
    {
        newValue = [[change objectForKey:NSKeyValueChangeNewKey] floatValue];
    }
    NSLog(@"player controls are visible: %@", newValue ? @"YES" : @"NO");
    self.controlsView.alpha = newValue;
}

-(void)recursiveViewTraversal:(UIView*)view counter:(int)counter {
    NSLog(@"Depth %d - %@", counter, view); //For debug
    if([view isKindOfClass:NSClassFromString(@"MPInlineVideoOverlay")]) {
        //Add any additional controls you want to have fade with the standard controls here
        mainControlsView = view;
    } else {
        for(UIView *child in [view subviews]) {
            [self recursiveViewTraversal:child counter:counter+1];
        }
    }
}

-(void)setupAdditionalControls {
    //Call after you have initialized your MPMoviePlayerController (probably viewDidLoad)
    mainControlsView = nil;
    [self recursiveViewTraversal:moviePlayer.view counter:0];

    //check to see if we found it, if we didn't we need to do it again in 0.1 seconds
    if(mainControlsView) {
        [mainControlsView addObserver:self forKeyPath:@"alpha"      options:NSKeyValueObservingOptionNew context:NULL];
    } else {
        [self performSelector:@selector(setupAdditionalControls) withObject:nil afterDelay:0.1];
    }
}`

其中mainControlsView是MPMoviePlayer的标准Apple控件，self.controlsView是我的自定义控件的视图。 I Key Value观察标准控件视图上的alpha属性，并在我发生更改时将其更改为匹配。

罗布

如何将KVO添加到MPMoviePlayerController，以便我可以检测控件何时可见

1 个答案: