使用NSNotificationCenter向另一个类发出通知

问题描述

所以我的目标是使用NSNotificationCenter向另一个类传递通知，我还想将带有通知的object传递给另一个class，我应该怎么做?

So my goal is to deliver a notification to another class with using NSNotificationCenter, I also want to pass object with the notification to the other class, how should I do this?

推荐答案

您必须先注册一个通知名称

You must first register a notification name

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(startLocating:) name:@"ForceUpdateLocation" object:nil]; // don't forget the ":"

然后发布带有参数字典的通知

And then post a notification with a dictionary of parameters

[[NSNotificationCenter defaultCenter] postNotificationName:@"ForceUpdateLocation" object:self userInfo:[NSDictionary dictionaryWithObject:@"1,2,3,4,5" forKey:@"categories_ids"]];

方法将是

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

    NSDictionary *dict = [notification userInfo];
}

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