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，

//在viewdidload中：
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(back) name:@"backback" object:nil];

-(void)back
{
[self dismissModalViewControllerAnimated:YES];
}