谁能帮我解决这个问题，我尝试了各种版本，但总是遇到错误或警告。下面的代码和输出来自SwiftPlayground。varfoundationDict=NSMutableDictionary()foundationDict.setObject("Bilbo",forKey:"FirstName")foundationDict.setObject("Baggins",forKey:"LastName")varswiftDict=foundationDictas!Dictionaryfor(key,value)inswiftDict{print("KEY:\(key)VALUE:|\(val