停用 UIScrollView 减速

问题描述

有没有办法取消 UIScrollView 的减速?

Is there a way to deactivate the decelerating of a UIScrollView?

我想允许用户滚动画布，但我不希望用户抬起手指后画布继续滚动.

I want to allow the user to scroll the canvas, but I don't want that the canvas continues scrolling after the user lifted the finger.

推荐答案

这可以通过利用 UIScrollView 委托方法 scrollViewWillBeginDecelerating 自动设置内容偏移量来完成当前屏幕位置.

This can be done by utilizing the UIScrollView delegate method scrollViewWillBeginDecelerating to automatically set the content offset to the current screen position.

实施:

1. 如果您还没有这样做，请为您的 UIScrollView 对象分配一个委托.

2. 在您的委托的 .m 实现文件中，添加以下代码行:

1. Assign a delegate to your UIScrollView object if you have not already done so.

2. In your delegate's .m implementation file, add the following lines of code:

-(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{  
    [scrollView setContentOffset:scrollView.contentOffset animated:YES];   
}

瞧！不再自动滚动.

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