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  • IOS--常用控件--UIScrollView

    scrollView每次停止时执行的代理方法:

    一、手动导致scrollView的滑动时:

    1.手滑一下scrollView,然后松开,scrollView自己慢慢停止,执行的方法:

    -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

    {  

      //OK,真正停止了,do something

    }

    2.手一直在scrollView上按着,受控制着scrollView最后停止,执行的方法:

    - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate

    {

        if(!decelerate)

        {   //OK,真正停止了,do something}

    }

    二、通过setContentOffset导致scrollView滑动:

    停止时会执行的方法:(前提是"(void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated"触发时,animated为YES.为no时,其实也没必要用代理方法了,直接set后就能处理)

    -(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView

    {}

    综上可得,想要在每次scrollView滑动结束后执行某方法,

    1.如果myScrollView.pagingEnabled=YES,  用

    -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

    {

      //do something

    }

    2.如果.pagingEnabled=NO,则需要用两个

    - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate

    {

        if(!decelerate)

        {   //OK,真正停止了,do something}

    }

    -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

    {  

      //OK,真正停止了,do something

    }

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  • 原文地址:https://www.cnblogs.com/howdoudo/p/3995348.html
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