presentModalViewControllerAnimated 和 dismissModalViewControllerAnimated

转自http://blog.163.com/youthpasses@yeah/blog/static/161849228201251905220964/

presentModalViewControllerAnimated 和 dismissModalViewControllerAnimated  

使用presentModalViewControllerAnimated方法从A->B->C，若想在C中直接返回A，则可这样实现：

C中返回事件：

void back  

{  

      [self dismissModalViewControllerAnimated:NO];//注意一定是NO！！  

      [[NSNotificationCenter  defaultCenter]postNotificationName:@"backback" object:nil];  

}

然后在B中，

1. //在viewdidload中：  
2. [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(back) name:@"backback" object:nil];  
3.   
4. -(void)back  
5. {  
6.      [self dismissModalViewControllerAnimated:YES];  
7. }