iphone – UISwipeGestureRecognizer手势起点

发布时间：2020-12-14 18:07:58 所属栏目：百科来源：网络整理

导读：是否可以从UISwipeGestureRecognizer获取手势起点.喜欢它的可能性 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch * touch = [touches anyObject]; gestureStartPoint = [touch locationInView:self];} 解决方法根据 UISwipe

是否可以从UISwipeGestureRecognizer获取手势起点.喜欢它的可能性

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    UITouch * touch = [touches anyObject];
    gestureStartPoint = [touch locationInView:self];
}

解决方法

根据 UISwipeGestureRecognizer documentation你可以：

You may determine the location where a swipe began by calling the UIGestureRecognizer methods locationInView: and locationOfTouch:inView:. The former method gives you the centroid if more than one touch was involved in the gesture; the latter gives the location of a particular touch.

PS：你真的应该先看看文档,答案是在UISwipeGestureRecognizer的类引用中,应该不难找到.作为开发人员的一部分是能够查找的东西,Apple有优秀的文档,使用它！

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