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  • Motion——shake攻略

    1、子类化窗口

    如果响应链中没有motionEnded:withEvent:消息的接收者,那么该消息就会被发送给应用程序的window对象。所以需要在window对象上拦截motionEnded:withEvent:,并实现自己的通知模式。

    #import <UIKit/UIKit.h>
    
    @interface MainWindow : UIWindow
    
    @end
    #import "MainWindow.h"
    
    @implementation MainWindow
    
    - (id)initWithFrame:(CGRect)frame
    {
        self = [super initWithFrame:frame];
        if (self) {
            // Initialization code
        }
        return self;
    }
    
    - (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
    {
        if (event.type == UIEventTypeMotion && event.subtype == UIEventSubtypeMotionShake)
        {
            [[NSNotificationCenter defaultCenter] postNotificationName:@"NOTIFICATION_SHAKE" object:self];
        }
    }
    #import "AppDelegate.h"
    #import "MainWindow.h"
    #import "ViewController.h"
    
    @implementation AppDelegate
    
    @synthesize window = _window;
    @synthesize viewController = _viewController;
    
    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
    {
        self.window = [[MainWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
        // Override point for customization after application launch.
        self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
        self.window.rootViewController = self.viewController;
        [self.window makeKeyAndVisible];
        return YES;
    }

    2、实现摇晃通知

    - (void) viewWillAppear: (BOOL)animated
    {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(shakeDetected:) name:@"NOTIFICATION_SHAKE" object:nil];
        [super viewWillAppear:animated];
    }
    
    - (void) viewWillDisappear: (BOOL)animated
    {
        [[NSNotificationCenter defaultCenter] removeObserver:self];
        [super viewWillDisappear:animated];
    }
    
    -(void)shakeDetected:(NSNotification *)paramNotification
    {
        NSLog(@"Shaken not stirred!");
    }
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  • 原文地址:https://www.cnblogs.com/fengmin/p/5505644.html
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