如何发布和接收 NSNotifications(目标 C) |通知(在 Swift 中)? [英] How to post and receive an NSNotifications (Objective C) | Notifications (in Swift)?

问题描述

是否有一种易于理解的模式如何发送 NSNotification(目标 C)|通知(在 Swift 中)以及如何接收通知?代码片段?文档写了大约 150 页关于该主题的内容.想看一个简单的例子.

Is there an easy-to-grock pattern how to send a NSNotification (Objective C) | Notification (in Swift) and how to receive one? Code snippet? The docs write like 150 pages on the topic. Would like to see a quick example.

推荐答案

发送通知:

[[NSNotificationCenter defaultCenter] postNotificationName:@"MyCacheUpdatedNotification" object:self];

收到:

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

采取行动:

- (void)cacheUpdated:(NSNotification *)notification {
[self load];
}

并处理掉它:

[[NSNotificationCenter defaultCenter] removeObserver:self];

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