iOS开发之运动事件和远程控制

                NSLog(@"End seek forward...");
                break;
            case UIEventSubtypeRemoteControlBeginSeekingBackward:
                NSLog(@"Begin seek backward...");
                break;
            case UIEventSubtypeRemoteControlEndSeekingBackward:
                NSLog(@"End seek backward...");
                break;
            default:
                break;
        }
        [self changeUIState];
    }
}
#pragma mark 界面布局
- (void)initLayout{
    //专辑封面
    UIImage *image = [UIImage imageNamed:@"wxl.jpg"];
    CGRect *frame = [UIScreen mainScreen].applicationFrame;
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:frame];
    imageView.image = image;
    imageView.contentMode = UIViewContentModeScaleAspectFill;
    [self.view addSubview:imageView];
    //播放控制面板
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 480, 320, 88)];
    view.backgroundColor = [UIColor lightGrayColor];
    view.alpha = 0.9;
    [self.view addSubview:view];
    //添加播放按钮
    _playButton = [UIButton buttonWithType:UIButtonTypeCustom];
    _playButton.bounds = CGRectMake(0, 0, 50, 50);
    CGFloat playBtnX = view.frame.size.width/2;
    CGFloat playBtnY = view.frame.size.height/2;
    _playButton.center = CGPointMake(playBtnX, playBtnY);
    [self changeUIState];
    [_playButton addTarget:self 
                    action:@selector(btnClick:) 
          forControlEvents:UIControlEventTouchUpInside];
    [view addSubview:_playButton];