我该如何使用UIScrollView？

Question

我该怎么用UIScrollView？请给我一个简单的例子,一个滚动图像？

Answer 1

这将使您了解UIScrollView控件:

学习UIScrollView的基础知识

参考 UIScrollView教程

一些包含基本功能的好样本

• http://halmueller.wordpress.com/2008/10/08/a-very-simple-uiscrollview-demo/
• http://developer.apple.com/iphone/library/samplecode/Scrolling/index.html
• http://www.vimeo.com/1642150
• http://jonathanwatmough.com/2008/12/implementing-tap-to-zoom-in-uiscrollview-on-an-iphone/
• http://cocoawithlove.com/2009/01/multiple-virtual-pages-in-uiscrollview.html

更何况:

• https://stackoverflow.com/search?q=UIScrollView

Answer 2

这就是一个例子。基本上我们创建一个滚动视图，设置其框架，添加内容作为子视图，然后设置内容大小。下面的图片 (iphone.png) 比 iPhone 屏幕大，以便我们可以滚动它。

UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 20, 320, 460)];
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"iphone.png"]];

[scrollView addSubview:imageView];
[imageView release];
scrollView.contentSize = CGSizeMake(imageView.image.size.width, imageView.image.size.height);
[window addSubview:scrollView];
[scrollView release];