ios ViewController 页面跳转

从一个Controller跳转到另一个Controller时，一般有以下2种：
1、利用UINavigationController，调用pushViewController，进行跳转；这种采用压栈和出栈的方式，进行Controller的管理。调用popViewControllerAnimated方法可以返回。

PickImageViewController *ickImageViewController = [[PickImageViewController alloc] init];
[self.navigationController pushViewController: ickImageViewController animated:true];
[ickImageViewController release];

2、利用UIViewController自身的presentModalViewController，进行跳转；调用dismissModalViewControllerAnimated方法可以返回。
PickImageViewController *ickImageViewController = [[PickImageViewController alloc] init];
[self presentModalViewController:ickImageViewController animated:YES];
//返回
[self dismissModalViewControllerAnimated:YES];

from：http://longquan.iteye.com/blog/1666292