需要AVPlayerView退出esc按钮按下的全屏

Question

我刚认识斯威夫特，而可可，来自JavaFX的背景。我在Xcode 6.1中构建了我的第一个Mac应用程序，它使用了一个AVPlayerView。我已经将AVPlayerView配置为提供了一个全屏按钮。当播放视频时，按下全屏图标会使播放器转到全屏。我正在寻找一种方法，使转义按钮使AVPlayerView返回到非全屏。

到目前为止，这是我的代码：

//subclassed AVPlayerView in an attempt to capture keystrokes
class VideoPlayerView: AVPlayerView, NSWindowDelegate {

    var lastPlayValue = true   //used in toggling play on space
    var ifs = false;           //variable holding "is full screen"

    //overrode this to get keystrokes
    override var acceptsFirstResponder: Bool {
        return true
    }

    //thought this would be called when full screen is entered  
    //but it isn't
    func windowDidEnterFullScreen(notification: NSNotification) {
        ifs = true
        println("Entered full screen")
        //attempting to grab keyevents while in full screen
        becomeFirstResponder()
    }

    //thought this would be called when full screen has exited
    //but it isn't
    func windowDidExitFullScreen(notification: NSNotification) {
        ifs = false;
        //attempting to grab key events after full screen exited
        becomeFirstResponder()
        println("Exited Fullscreen")

    }


    //grabs key events.  Works when not in full screen mode
    override func keyUp(theEvent: NSEvent) {

       //handle events here.

    } 
}

我的问题是: 1)当视频进入全屏时，VideoPlayerView似乎失去了焦点。2)我无法检测到视频已转到全屏( windowDidEnter方法不触发)，3)我无法检测视频是否已离开全屏( windowDidExit方法没有启动)

另外，当我学习可可和Swift的时候，请告诉我这种方法是否正确。

如有任何帮助或指示，我们将不胜感激。

谢谢

新信息：--我已经注册了所有要进入全屏的视图的通知，但从未收到过。在仔细检查AVPlayerView的“全屏”之后，它似乎模仿了全屏的特性，而不是真正的“全屏”。

Answer 1

所做的工作是不允许AVPlayerView上的全屏按钮，并通过我创建的按钮手动控制全屏功能。

Answer 2

我也曾在AVPlayerView上经历过这个问题。如果像这样启用全屏按钮：

self.playerView.showsFullScreenToggleButton = YES;

我点击全屏按钮视频进入全屏，然而，应用程序不接受任何关键输入，你不能激活任务Montrol，LaunchPad等。这是一个非常糟糕的用户体验，我相信如果你向Mac提交这样的应用程序，它将被拒绝。同时，我也试图让我的AVPlayerView成为第一个响应者，但没有效果。

解决方案

因此，我研究了QuickTime播放器在全屏播放视频方面的工作原理。我注意到它在播放器控件上没有一个全屏按钮。它处理全屏的方式是，当用户点击窗口的全屏控件时，它会调整窗口的大小，如果我是正确的，AVPlayerView或苹果正在使用的任何东西。要实现类似的内容，请执行以下操作：

//The window that contains your AVPlayerView set the delegate
 [self.window setDelegate:self];


//So you can respond to these notifications

- (void)windowDidEnterFullScreen:(NSNotification *)notification{
        // wait a bit
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

                if (self.playerView.isReadyForDisplay == YES) {

        //Make sure the playerView is ready for display

        //Set the playerView to the screen's current frame (Very Important!)
         [self.playerView setFrame:[[NSScreen mainScreen] frame]];

        //Do other UI related things here e.g hide elements e.t.c

        }

        });
        }

- (void)windowWillExitFullScreen:(NSNotification *)notification{
//Do other UI related things here e.g show elements e.t.c

}

//If you have a ToolBar in your application do this:

- (NSApplicationPresentationOptions)window:(NSWindow *)window willUseFullScreenPresentationOptions:(NSApplicationPresentationOptions)proposedOptions
{
    return (NSApplicationPresentationFullScreen |
            NSApplicationPresentationHideDock |
            NSApplicationPresentationAutoHideMenuBar |
            NSApplicationPresentationAutoHideToolbar);
}

// To determine if the window is in fullscreen e.g. if the application opened/restored in a fullscreen state the windowDidEnterFullScreen will not be called. So you need to do this:

- (BOOL) isFullScreenMode {
    NSApplicationPresentationOptions opts = [[NSApplication sharedApplication ] presentationOptions];
    if ( opts & NSApplicationPresentationFullScreen) {
        return YES;
    }
    return NO;
}

结论

我希望这能回答你的问题。另外，我认为这是苹果的一个bug，所以我将在明天提交一份bug报告。