iphone - 不会触发任何与方向相关的通知。为什么？

Question

我希望在设备方向发生变化时收到通知。我已经设置了一个应该接收通知的测试方法。我正在尝试几个不同的观察者来实现这一目标，但他们都不起作用。为什么 testMethod 没有被解雇？

- (void)viewDidLoad
{
    [super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    // register for orientation change notification

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(testMethod)     name:@"UIDeviceOrientationDidChangeNotification" object:nil];

    [[NSNotificationCenter defaultCenter] addObserver: self
                                         selector: @selector(testMethod)
                                             name: UIApplicationWillChangeStatusBarOrientationNotification
                                           object: nil];
    [[NSNotificationCenter defaultCenter] addObserver: self
                                         selector: @selector(testMethod)
                                             name: UIApplicationDidChangeStatusBarOrientationNotification
                                           object: nil];
}

- (void)testMethod
{
    NSLog(@"phone was rotated");
}

Answer 1

我不小心打开了手机上的旋转锁。始终在多部手机上进行测试!