调用CLLocation中的额外参数'userinfo'

Question

以下代码给我一个Extra argument 'userinfo' in call错误。我已经看过了建议，由@27620493和27875005

class SOViewController : UIViewController { 

var currentLocation : CLLocation! 

func setCurrentLocation(currentLocation: CLLocation) { 

    if (self.currentLocation == currentLocation) { 
     return 
    } 
    self.currentLocation = currentLocation 

    dispatch_async(dispatch_get_main_queue(), NSNotificationCenter.defaultCenter().postNotificationName(aName: SOCurrentLocationDidChangeNotification, object: nil, userInfo: ["kSOLocationKey" : currentLocation])) 


} 

我不知道为什么我收到此错误考虑currentLocation是可选的。

Answer 1

那些修改代码：

dispatch_async(dispatch_get_main_queue(), {() -> Void in 
    NSNotificationCenter.defaultCenter().postNotificationName(SOCurrentLocationDidChangeNotification, object: nil, userInfo: ["kSOLocationKey" : currentLocation]) 
})