Cocoa 自定义通知示例 [英] Cocoa Custom Notification Example

问题描述

谁能给我看一个 Cocoa Obj-C 对象的例子，它带有自定义通知，如何触发、订阅和处理它?<​​/p>

Can someone please show me an example of a Cocoa Obj-C object, with a custom notification, how to fire it, subscribe to it, and handle it?

推荐答案

@implementation MyObject

// Posts a MyNotification message whenever called
- (void)notify {
  [[NSNotificationCenter defaultCenter] postNotificationName:@"MyNotification" object:self];
}

// Prints a message whenever a MyNotification is received
- (void)handleNotification:(NSNotification*)note {
  NSLog(@"Got notified: %@", note);
}

@end

// somewhere else
MyObject *object = [[MyObject alloc] init];
// receive MyNotification events from any object
[[NSNotificationCenter defaultCenter] addObserver:object selector:@selector(handleNotification:) name:@"MyNotification" object:nil];
// create a notification
[object notify];

有关更多信息，请参阅 NSNotificationCenter.

For more information, see the documentation for NSNotificationCenter.

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