iOS NSNotificationCenter Posting a Notification with Data

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let userInfo: [String: AnyObject] = ["someKey": myObject]
NSNotificationCenter.defaultCenter().postNotificationName("TestNotification", object: self, userInfo: userInfo)


NSDictionary *userInfo = [NSDictionary dictionaryWithObject:myObject forKey:@"someKey"];
[[NSNotificationCenter defaultCenter] postNotificationName: @"TestNotification" object:nil userInfo:userInfo];

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