iOS：如何检测摇动？

iOS : How to detect Shake motion?

提问by Samblg

I added the following code to my appDelegate.m

我将以下代码添加到我的 appDelegate.m

- (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:@"shake" object:self];
    }
}

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

- (void)shakeSuccess
{
    // do something...
}

and then I added :

然后我补充说：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    // INIT THE BACKGROUND PATH STRING

    [self refreshFields];
    [self.window addSubview:navController.view];
    [self.window makeKeyAndVisible];
    ***[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(shakeSuccess) name:@"shake" object:nil];***

    return YES;
}

When I start my app on my iPhone, the method named "shakeSuccess" doesn't called. What should I do to implement this function in my app? any idea?

当我在 iPhone 上启动我的应用程序时，没有调用名为“shakeSuccess”的方法。我应该怎么做才能在我的应用程序中实现这个功能？任何的想法？

回答by Christian Schnorr

This might help you...
https://stackoverflow.com/a/2405692/796103

这可能会帮助你...
https://stackoverflow.com/a/2405692/796103

He says that you should set the UIApplication's applicationSupportsShakeToEditto YES. and override 3 methods in your VC:

他说你应该把UIApplication's设置applicationSupportsShakeToEdit为 YES。并覆盖 VC 中的 3 个方法：

-(BOOL)canBecomeFirstResponder {
    return YES;
}

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

- (void)viewWillDisappear:(BOOL)animated {
    [self resignFirstResponder];
    [super viewWillDisappear:animated];
}

The rest of your code is fine. (the -motionEnded:withEvent:)

你的其余代码很好。( -motionEnded:withEvent:)

回答by Thomas Stone

You could do something like this...

你可以做这样的事情......

Firstly...

首先...

Set the applicationSupportsShakeToEdit property in the App's Delegate:

在应用程序的委托中设置 applicationSupportsShakeToEdit 属性：

- (void)applicationDidFinishLaunching:(UIApplication *)application {

    application.applicationSupportsShakeToEdit = YES;

    [window addSubview:viewController.view];
    [window makeKeyAndVisible];
}

Secondly...

其次...

Add/Override canBecomeFirstResponder, viewDidAppear: and viewWillDisappear: methods in your View Controller:

在您的视图控制器中添加/覆盖 canBecomeFirstResponder、viewDidAppear: 和 viewWillDisappear: 方法：

-(BOOL)canBecomeFirstResponder {
    return YES;
}

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

- (void)viewWillDisappear:(BOOL)animated {
    [self resignFirstResponder];
    [super viewWillDisappear:animated];
 }

Thirdly...

第三...

Add the motionEnded method to your View Controller:

将 motionEnded 方法添加到您的视图控制器：

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
   if (motion == UIEventSubtypeMotionShake)
   {
    // your code
   }
 }

That should work if the first answer did not and this is only quickly typed not tested:)

如果第一个答案没有，那应该可以工作，这只是快速输入未测试:)

回答by Cherpak Evgeny

If you want to be able to detect the shake motion across the app, the best way is to override the class of your application with a custom class.

如果您希望能够检测整个应用程序的抖动运动，最好的方法是使用自定义类覆盖应用程序的类。

And then implement this in your custom application class

然后在您的自定义应用程序类中实现它

@implementation PSApplication

- (void)sendEvent:(UIEvent *)event
{
    if ( event.type == UIEventTypeMotion && event.subtype == UIEventSubtypeMotionShake ) {
        [[NSNotificationCenter defaultCenter] postNotificationName:@"shakeNotification" object:nil];
    }

    [super sendEvent:event];
}

@end

回答by Harit K

I extended UIApplication class and added class reference to main: MyApplication.h

我扩展了 UIApplication 类并添加了对 main: MyApplication.h 的类引用

@interface MyApplication : UIApplication

@end

MyApplication.m

我的应用程序.m

@implementation MyApplication

- (void) sendEvent:(UIEvent *)event
{
    if( event && (event.subtype==UIEventSubtypeMotionShake))
    {
        AppDelegate *objAppDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;

        [objAppDelegate doWhatEver];
        [super sendEvent:event];
    }
    else
    {
        [super sendEvent:event];
    }
}

@end

And the last step in main.m

以及 main.m 中的最后一步

int main(int argc, char *argv[])
{
return UIApplicationMain(argc, argv, NSStringFromClass([MyApplication class]), NSStringFromClass([AppDelegate class]));
}

This works in all cases.

这适用于所有情况。