如何以编程方式滚动 UIScrollView？

发布于 2024-11-02 06:36:25 字数 499 浏览 0 评论 0原文

我有一个 UIScrollView，可以通过滑动来显示新视图。我有一个按钮，我想以编程方式滚动视图。因此，如果我单击它一次，它将滚动到下一个视图。我怎样才能实现这个？

这是滚动视图代码

- (void)scrollViewDidEndDecelerating:(UIScrollView *)aScrollView
{
    NSUInteger offset = aScrollView.contentOffset.x;
    NSUInteger width = aScrollView.contentSize.width;
    int anIndex = (offset == 0) ? 0 : (int)(width/(width - offset));
    selectedDeal = [deals objectAtIndex:(anIndex > [deals count]- 1 ? [deals count]- 1 : anIndex)];
}

原文

I have a UIScrollView that I can swipe through to display new views. I have a button that I want to programmatically scroll through the views. So if I click it once, it will scroll to the next view. How can I implement this?

Here is the scrollview code

- (void)scrollViewDidEndDecelerating:(UIScrollView *)aScrollView
{
    NSUInteger offset = aScrollView.contentOffset.x;
    NSUInteger width = aScrollView.contentSize.width;
    int anIndex = (offset == 0) ? 0 : (int)(width/(width - offset));
    selectedDeal = [deals objectAtIndex:(anIndex > [deals count]- 1 ? [deals count]- 1 : anIndex)];
}

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慢慢从新开始 2024-11-09 06:36:25

[myScrollView scrollRectToVisible:myView.frame animated:TRUE];

这将滚动，以便 myView 变得可见，假设 myView 已添加到滚动视图并且它尚未可见。您需要跟踪当前可见视图，并且在按钮处理程序中，您需要将下一个视图的框架作为参数传递给上述方法。

[myScrollView scrollRectToVisible:myView.frame animated:TRUE];

This will scroll so that myView becomes visible, assuming myView is added to the scroll view and it is not already visible. You need to keep track of current visible view and in the button handler you need to pass next view's frame as parameter to the above method.

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月下凄凉 2024-11-09 06:36:25

[myScrollView setContentOffset:CGPointMake(self.view.frame.size.width, 0)animated:YES];

[myScrollView scrollRectToVisible:self.view.frame animated:YES];

[myScrollView setContentOffset:CGPointMake(self.view.frame.size.width, 0)animated:YES];

[myScrollView scrollRectToVisible:self.view.frame animated:YES];

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