观察通知

Created: November-22, 2018

迅速

func testNotification(notification: NSNotification) {
    let userInfo = notification.userInfo
    let myObject: MyObject = userInfo["someKey"]
}

Objective-C

- (void)testNotification:(NSNotification *)notification {
    NSDictionary *userInfo = notification.userInfo;
    MyObject *myObject = [userInfo objectForKey:@"someKey"];
}