如何在UIScrollView中进行没有垂直分页的水平分页

Question

我现在正在制作数字漫画.我的应用程序在没有缩放时有水平分页.但是在缩放时,图片的高度超过了屏幕高度.所以应用程序有垂直分页.

但我不需要垂直分页.我想在zooiming期间进行水平分页而不进行垂直分页.

请教我.

Answer 1

这很简单.正如你的朋友建议的那样,你至少需要两个UIScrollView.您将需要一个UIScrollView用于水平(即分页),您将需要一个UIScrollView针对每个页面.关键点是(让我们命名scrollHorizontal和scrollVertical):

• scrollHorizontal.frame.height必须相等scrollHorizontal.contentSize.height(否则,你将最终得到垂直分页)
• scrollVertical:首先,每个页面都有一个.框架宽度contentSize.width应与页面宽度(在您的scrollHorizontal)中匹配并有意义.你当然应该有框架高度不超过scrollHorizontal.contentSize.height.

示例代码:

UIScrollView scrollHorizontal = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];

scrollHorizontal.pagingEnabled = YES;
scrollHorizontal.directionalLockEnabled = YES; // not needed but helpful

// Now let's create each page

UIScrollView *scrollPage1 = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];

[scrollPage1 addSubview:theContentViewForPage1];

scrollPage1.contentSize = CGSizeMake(self.view.bounds.size.width, theContentViewForPage1.bounds.size.height);

// Add page to scrollHorizontal

[scrollHorizontal addSubview:scrollPage1];
[scrollPage1 release];

//...add more pages (REMEMBER to set the scroll view's frame.origin.x accordingly for each additional page)

// Set the scrollHoriztonal content size
scrollView.contentSize = CGSizeMake(self.view.bounds.size.width*NUMBER_OF_PAGES, self.view.bounds.size.height);

// Now add the scrollview to self.view; or even self.view = scrollHorizontal, etc.