Downcast from'[NSObject:AnyObject]?'to'Dictionary<NSObject,AnyObject>'only unwraps

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Downcast from'[NSObject:AnyObject]?'to'Dictionary<NSObject,AnyObject>'only unwraps

错误代码:

var info:Dictionary<String,Int>! = notification.userInfo as! Dictionary

正确代码:

2

var info:Dictionary<String,Int>! = notification.userInfo as! AnyObject as! Dictionary



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