小编Sma*_*kon的帖子

我有一个带AVPlayer的应用程序来播放视频.我希望能够检测到用户何时按下遥控器上的按钮.我尝试实现以下方法,但remoteControlReceivedWithEvent()不响应任何控件事件.

- (void)remoteControlReceivedWithEvent:(UIEvent *)event {
    //if it is a remote control event handle it correctly
    if (event.type == UIEventTypeRemoteControl) {
        if (event.subtype == UIEventSubtypeRemoteControlPlay) {
            NSLog(@"play");
        } else if (event.subtype == UIEventSubtypeRemoteControlPause) {
            NSLog(@"pause");
        } else if (event.subtype == UIEventSubtypeRemoteControlTogglePlayPause) {
            NSLog(@"toggle");
        }
    }
}

- (BOOL)canBecomeFirstResponder {
    return YES;
}

- (void)viewDidAppear:(BOOL)animated {
    // Setup Apple TV control events
    [super viewDidAppear:animated];
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    [self becomeFirstResponder];
}

- (void)viewWillDisappear:(BOOL)animated {
    // Remove Apple TV control events
    [super viewWillDisappear:animated];
    [[UIApplication …

我试图了解一个视图如何响应它的边界被改变.如果我更改视图的边界原点,它会相应地更改帧原点吗？

例如

UIView *greenView = [[UIView alloc] initWithFrame:CGRectMake(150, 150, 150, 200)];
greenView.backgroundColor = [UIColor colorWithRed:0.494 green:0.827
                                             blue:0.129 alpha:1];
[self.view addSubview:greenView];
greenView.bounds = CGRectMake(0, 150, greenView.bounds.size.width, greenView.bounds.size.height);

这不会将框架的原点改为(150,300)吗？运行上面的代码似乎没有改变它的框架.(我知道你不是要用边界改变观点位置,这只是一个假设).