MotionEnded 未被调用（无视图控制器）

发布于 2024-09-15 12:25:16 字数 648 浏览 3 评论 0原文

我想我已经做了所有应该检测到的震动，但是 motionEnded:withEvent: 从未被调用。（一个问题是我没有 UIViewController - 我的应用程序基于“OpenGL ES App”模板。）

我添加了 application.applicationSupportsShakeToEdit = YES; 到我的 application:didFinishLaunchingWithOptions:，以及

- (BOOL)canBecomeFirstResponder { return YES; }

EAGLView.m（确实被调用），以及 [self comeFirstResponder]; 到 initWithCoder: （并且也尝试过其他各种地方）。

但调试器从未命中

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event

我是否错过了某些步骤？我必须有一个控制器吗？

（我在 iPad 模拟器中使用 iOS 3.2。）

原文

I think I've done all I should to detect a shake, but motionEnded:withEvent: never gets called. (One wrinkle is that I don't have a UIViewController - my app is based on the "OpenGL ES App" template.)

I've added application.applicationSupportsShakeToEdit = YES; to my application:didFinishLaunchingWithOptions:, and

- (BOOL)canBecomeFirstResponder { return YES; }

to EAGLView.m (which does get called), and [self becomeFirstResponder]; to initWithCoder: (and have tried various other places too).

But the debugger never hits

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event

Am I missing some step? Do I have to have a controller?

(I'm using iOS 3.2 in the iPad simulator.)

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帅哥哥的热头脑 2024-09-22 12:25:16

您必须将其添加到您的控制器中：

-(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    [self becomeFirstResponder];
}

-(BOOL)becomeFirstResponder
{
    return YES;
}

You must add this to your controller:

-(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    [self becomeFirstResponder];
}

-(BOOL)becomeFirstResponder
{
    return YES;
}

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离鸿 2024-09-22 12:25:16

UIResponder 链处理摇动通知的方式令人讨厌。似乎 UIWindow 总是收到通知，然后子响应者可能会或可能不会取决于链中它们上面的内容。我创建了一个 UIWindow 子类，并将其定义为我的窗口类，如下所示：

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event 
{
    if (event.type == UIEventSubtypeMotionShake) 
        [[NSNotificationCenter defaultCenter] postNotificationName:@"UIEventSubtypeMotionShakeEnded" object:nil];
}

然后，对于任何需要摇动通知的视图，我只需让它们将自己添加为 UIEventSubtypeMotionShakeEnded 的观察者事件，他们每次都得到它。

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

The way the UIResponder chain works with the shake notification is obnoxious. Seems that UIWindow always gets the notification, and then sub-responders may or may not depending on whats above them in the chain. I created a UIWindow subclass, and defined it as my window class with the following:

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event 
{
    if (event.type == UIEventSubtypeMotionShake) 
        [[NSNotificationCenter defaultCenter] postNotificationName:@"UIEventSubtypeMotionShakeEnded" object:nil];
}

Then, for any views that wanted the shake notifications, I simply had them add themselves as an observer to the UIEventSubtypeMotionShakeEnded event, and they got it every time.

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

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