scrollViewDidScroll 从未调用过 [英] scrollViewDidScroll never called

问题描述

我在视图中有一个滚动视图.我想使用函数 scrollViewDidScroll 来检查和更新箭头(左右).

I have a Scrollview within View. I want to use the function scrollViewDidScroll to check and update the arrows (left right).

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {

    NSLog(@"Did scroll");
    [self updateButtons];
}

当我向左或向右滚动时，似乎不会调用 scrollViewDidScroll.我搜索了所有内容，但没有找到解决方案.

It seems scrollViewDidScroll won't be called when I scroll left or right. I searched everything but didn't found a solution.

希望有人有解决方案.

推荐答案

典型的错误是没有简单地设置视图的委托".你可能忘记的是

The typical error is that "one does not simply set the delegate of a view". What you have probably forgotten is

theScrollView.delegate = self;

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