关闭模式视图控制器 [英] Dismissing Modal View Controllers

问题描述

这是我的流程：

$ b $

  A呈现B，呈现C 
  

当B呈现C时，我想要B被驳回，所以我唯一的视图控制器是A和C.我不知道在哪里调用：

  [self dismissModalViewControllerAnimated：NO]; 
  

。

我创建了一个委托模式，在B之后出现C，A会关闭B，但没有什么被解雇。

如果B是C的委托，那么C会自动关闭。

解决方案

我想你可以使用NSNotificationCenter。
你可以在B调用一个NSNotificationCenter，调用一个方法来关闭自己，然后通过C发送通知，调用B的NSNotificationCenter。

 <$> 
 
 
 
 c $ c> [[NSNotificationCenter defaultCenter] addObserver：self selector：@selector（dismissFunction :) name：@DismissFunctionobject：nil]; 
  

，方法如下：

   - （void）dismissFunction：（NSNotification *）notification 
 {
 [self.navigationController dismissModalViewControllerAnimated：YES]; 
} 
  

在C中添加：

$ b b

  [[NSNotificationCenter defaultCenter] postNotificationName：@DismissFunctionobject：nil]; 
  

View Controller A presents View Controller B modally, which has a button to present View Controller C modally.

Here is my flow:

A presents B which presents C

When B presents C, I want B to be dismissed, so my only view controllers are A and C. I am not sure where to call:

[self dismissModalViewControllerAnimated:NO];

in order to dismiss B.

I created a delegation pattern, where right after B presents C, A will dismiss B however nothing gets dismissed.

If B is C's delegate then C dismisses itself.

解决方案

I think you can use NSNotificationCenter. You can make a NSNotificationCenter at B that calling a method to dismiss itself, then make a post Notification from C to call the NSNotificationCenter at B.

I'm not sure of it, but it may works.

In B add:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(dismissFunction:) name:@"DismissFunction" object:nil];

and the method like this:

- (void)dismissFunction:(NSNotification*)notification
{
      [self.navigationController dismissModalViewControllerAnimated:YES];
}

And in C add:

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

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