摇动检测iPhone 3.0不工作 [英] Shake Detection iPhone 3.0 not working

问题描述

我有一个ViewController，可以触发一个动作的按钮。我想用一个摇动事件替换按钮，所以我已经google了它，并创建了一个从UIView

继承的ShakeDetector类，我的实现如下： / p>

  @implementation ShakeDetector 
 
  - （void）motionBegan：（UIEventSubtype）motion withEvent：（UIEvent *）事件
 {
} 
 
  - （void）motionEnded：（UIEventSubtype）motion withEvent：（UIEvent *）event 
 {
 if（motion == UIEventSubtypeMotionShake）
 {
 //用户正在摇动设备。发布名为摇的通知。 
 // [[NSNotificationCenter defaultCenter] postNotificationName：@spinobject：self]; 
 NSLog（@sss）; 
} 
} 
 
  - （void）motionCancelled：（UIEventSubtype）motion withEvent：（UIEvent *）event 
 {
} 
 
 @end 
  

但是我无法使其工作...任何帮助？ p>

谢谢

解决方案

Put：

   - （BOOL）canBecomeFirstResponder 
 {
 return YES; 
} 
  

和您的观点：

$ b $ （$）$ {code> - （void）viewDidAppear：（BOOL）动画{
[super viewDidAppear：animated];
[self becomeFirstResponder];
}
- （void）viewDidDisappear：（BOOL）animated {
[self resignFirstResponder];
[super viewDidDisappear：animated];
}

您还可以将其写入viewWillAppear和viewWillDisappear

I have a ViewController that works perfectly with a button that trigger an action. I would like to replace the button with a shake event so I've googled it around and created a ShakeDetector class that ineherits from UIView

and my implementation is as follow:

@implementation ShakeDetector

    - (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event
    {
    }

    - (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
    {
        if (motion == UIEventSubtypeMotionShake )
        {
            // User was shaking the device. Post a notification named "shake".
            //[[NSNotificationCenter defaultCenter] postNotificationName:@"spin" object:self];
            NSLog(@"sss");
        }
    }

    - (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event
    {   
    }

@end

But I can't make it work... any help?

Thanks

解决方案

Put :

    -(BOOL)canBecomeFirstResponder
{
    return YES;
}

and for your view :

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

You can also write it in viewWillAppear and viewWillDisappear

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