多个对象订阅 NSNotification (Objective-c)
我有一个订阅 MyNSNotification 的 Objective-c 类 MyClass。我的应用程序中有多个 MyClass 实例。因此多个对象会收到通知。 有没有办法“过滤”特定对象的通知？
我想在选择器中进行检查。我只是不确定如何设置它。
I have an Objective-c class MyClass that subscribes to MyNSNotification. There are multiple instances of MyClass in my application. Hence multiple objects receive the notification. Is there a way to "filter" notifications for a particular object?
I imagine doing a check in the selector. I'm just not sure how to set it up.
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使用 userInfo 来发出通知。接收一个检查 userInfo 以确定此通知是否针对此处。有时足以知道谁发送了通知。为此使用对象属性。请参阅类参考 http:// developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSNotification_Class/Reference/Reference.html
Use userInfo for that purpose issuing notification. Recieving one check userInfo to decide if this notification targeted here or not. Sometimes enough to know who sent notification. Use object property for that. Consult class reference http://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSNotification_Class/Reference/Reference.html