iPhone UIScrollview 页面

发布于 2024-10-27 23:57:19 字数 238 浏览 1 评论 0原文

我有一个水平滚动视图：

[journal setPagingEnabled:YES];

我一直在使用自定义方法在触摸按钮时向右滚动

[journal setContentOffset:CGPointMake(320,0) animated:YES];

是否存在用于处理页面的现有方法以及如何找到它？

谢谢，路

原文

I have a horizontal scrollview with :

[journal setPagingEnabled:YES];

I've been using a custom method to scroll to the right on the touch of a button

[journal setContentOffset:CGPointMake(320,0) animated:YES];

Is there an already existing method for working with pages and how do I find it?

Thanks,
Rd

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棒棒糖 2024-11-03 23:57:19

如果您正在寻找类似 [myScrollViewscrollToPage:3] 的内容，那么不，没有内置方法。如果您确实想要明确的东西，那么自己推出也很容易。假设一个水平分页的 UIScrollView：

- (void)scrollUIScrollView:(UIScrollView*)scrollView toPage:(NSInteger)page {

    CGFloat pageWidth = scrollView.frame.size.width;
    CGFloat pageHeight = scrollView.frame.size.height;
    CGRect scrollTarget = CGRectMake(page * pageWidth, 0, pageWidth, pageHeight);
    [scrollView scrollRectToVisible:scrollTarget animated:YES];
}

好吧，方法名称很糟糕，但这就是基本思想。我可能更适合 UIScrollView 上的类别。

If you're looking for something like [myScrollView scrollToPage:3], then no, there is no built in method. It's also pretty easy to roll your own if you really want something explicit. Assuming a horizontally paged UIScrollView:

- (void)scrollUIScrollView:(UIScrollView*)scrollView toPage:(NSInteger)page {

    CGFloat pageWidth = scrollView.frame.size.width;
    CGFloat pageHeight = scrollView.frame.size.height;
    CGRect scrollTarget = CGRectMake(page * pageWidth, 0, pageWidth, pageHeight);
    [scrollView scrollRectToVisible:scrollTarget animated:YES];
}

Okay, the method name is terrible, but that's the basic idea. I may be nicer in a Category on UIScrollView.

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