振动检测

震动检测主要分为下面4个步骤，依次实现即可// step1 @interface UIWindow (MotionRecognizing)@end@interface UIResponder (MotionRecognizers)/** Registers the receiver for future motion events. The `action` message will be sent to the receiver when a motion event occurs and is not intercepted in the responder chain. The `action` selector must take exactly one parameter of type NSNotification. You must not add a motion recognizer more than once. */- (void) addMotionRecognizerWithAction:(SEL)action;/** You must call this before deallocating the receiver. */- (void) removeMotionRecognizer;@end

@implementation UIWindow (MotionRecognizing)- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent*)event{if (event.type == UIEventTypeMotion && event.subtype == UIEventSubtypeMotionShake)    {[[NSNotificationCenter defaultCenter] postNotificationName:@"CPDeviceShaken" object:self];    }}@end@implementation UIResponder (MotionRecognizers)- (void) addMotionRecognizerWithAction:(SEL)action{[[NSNotificationCenter defaultCenter] addObserver:self selector:action name:@"CPDeviceShaken" object:nil];}- (void) removeMotionRecognizer{[[NSNotificationCenter defaultCenter] removeObserver:self name:@"CPDeviceShaken" object:nil];}@end

// step2: - (void) viewWillAppear:(BOOL)animated {[super viewWillAppear:animated];// Step 2 - Register for motion event:[self addMotionRecognizerWithAction:@selector(motionWasRecognized:)];}

// step3:- (void) viewDidDisappear:(BOOL)animated {// Step 3 - Unregister:[self removeMotionRecognizer];[super viewDidDisappear:animated];}

// step4- (void) motionWasRecognized:(NSNotification*)notif {      // 震动后，在这里实现结果}

另外有实现屏幕震动的代码：

stackoverflow shake visual screen use coreanimation