ios8 - 如何检测AVPlayerViewController的全屏模式

Question

如何检测用户何时按下AVPlayerViewController的展开图标？
我想知道正在播放的电影何时进入全屏模式。

Answer 1

还可以观察bounds的playerViewController.contentOverlayView并将其与[UIScreen mainScreen].bounds进行比较，例如:

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");
            }
        }
    }
}