ios 判断左右摆动方法与摇一摇

最新推荐文章于 2016-09-29 15:13:05 发布

原创最新推荐文章于 2016-09-29 15:13:05 发布 · 3.5k 阅读

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本文介绍如何在iOS应用中实现摇晃设备触发编辑功能。通过设置applicationSupportsShakeToEdit属性，并在ViewController中重写特定方法，如canBecomeFirstResponder、viewDidAppear:和viewWillDisappear:等，来响应摇晃事件。同时提供了motionEnded:和motionBegan:方法的具体实现。

首先在App's Delegate中设定applicationSupportsShakeToEdit属性：

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

        application.applicationSupportsShakeToEdit = YES;

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

然后在你的View控制器中添加/重载canBecomeFirstResponder, viewDidAppear:以及viewWillDisappear:

-(BOOL)canBecomeFirstResponder {
    return YES;
}

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

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

最后在你的view控制器中添加motionEnded：

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
    if (motion == UIEventSubtypeMotionShake)
    {
        // your code
        NSLog(@"end animations");
    }
}

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

    if (motion == UIEventSubtypeMotionShake)
    {
        // your code
        NSLog(@"begin animations");
    }
}

最后，经过我的测试这个方法不是很好，个人还是觉得用重力感应好一点，比较精准。但是在不用的应用场景也是可以的。