如何检测AVPlayerViewController的全屏模式

问题描述

如何检测用户何时按下AVPlayerViewController的展开图标？
我想知道电影播放何时进入全屏模式。

How can I detect when the user press the expand icon of the AVPlayerViewController?I want to know when the movie playing is entering the fullscreen mode.

推荐答案

还可以观察 bounds of playerViewController.contentOverlayView 并将其与 [UIScreen mainScreen] .bounds ，例如：

It is also possible to observe bounds of playerViewController.contentOverlayView and compare that to [UIScreen mainScreen].bounds, e.g.:

self.playerViewController = [AVPlayerViewController new];
// do this after adding player VC as a child VC or in completion block of -presentViewController:animated:completion:
[self.playerViewController.contentOverlayView addObserver:self forKeyPath:@"bounds" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:NULL];

...

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *, id> *)change context:(void *)context {
    if (object == self.playerViewController.contentOverlayView) {
        if ([keyPath isEqualToString:@"bounds"]) {
            CGRect oldBounds = [change[NSKeyValueChangeOldKey] CGRectValue], newBounds = [change[NSKeyValueChangeNewKey] CGRectValue];
            BOOL wasFullscreen = CGRectEqualToRect(oldBounds, [UIScreen mainScreen].bounds), isFullscreen = CGRectEqualToRect(newBounds, [UIScreen mainScreen].bounds);
            if (isFullscreen && !wasFullscreen) {
                if (CGRectEqualToRect(oldBounds, CGRectMake(0, 0, newBounds.size.height, newBounds.size.width))) {
                    NSLog(@"rotated fullscreen");
                }
                else {
                    NSLog(@"entered fullscreen");
                }
            }
            else if (!isFullscreen && wasFullscreen) {
                NSLog(@"exited fullscreen");
            }
        }
    }
}

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