如何使用 NSNotification [英] How to use NSNotification

问题描述

在我的应用程序中有两个 viewController，分别是 FirstViewController 和 DetailViewController.当点击表格单元格时，它会导航到 DetailViewController.在 DetailViewController 中，我想编辑并重新加载 FirstViewController 的表格视图

In my application there is two viewControllers as FirstViewController and DetailViewController. When tap on a table cell, it navigate to DetailViewController. In DetailViewController, I want to edit and reload the FirstViewController's table view

如何使用 NSNotification 解决这个问题?

How can I use NSNotification for this problem?

这是我要实现的方法 NSNotification 东西

Here's the method I want to implement NSNotification stuff

-(IBAction) save{
strSelectedText=theTextField.text;

[NSNotificationCenter defaultCenter];
NSNotification* notification = [NSNotification notificationWithName:@"MyNotification" object:self];
[[NSNotificationCenter defaultCenter] postNotification:notification];  

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



[self.navigationController popViewControllerAnimated:YES];
}

推荐答案

-(void)viewDidLoad {

[NSNotificationCenter defaultCenter];
NSNotification* notification = [NSNotification notificationWithName:@"MyNotification" object:self];
[[NSNotificationCenter defaultCenter] postNotification:notification];  

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

}


-(IBAction) save{

[[NSNotificationCenter defaultCenter] postNotificationName:MyNotification object:sender];

//this will go to where you implement your selector objFirstViewController.

}

-(void)objFirstViewController:(NSNotification *)notification {

}

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