Cannot find an initializer for type '[(String)]' that accepts an argument list of type '(LazyForward

Swift编译错误: Cannot find an initializer for type ‘[(String)]‘ that accepts an argument list of type ‘(LazyForwardCollection<MapCollectionView<Dictionary<Int,
String>, Int>>)‘

错误代码:

var dict = [1:
"m", 2:
"i", 3: "i",4:
"s"]

let dictKeysArray = [String](dict.keys)

根据字典字面量推断,该字典的类型是<Int: String>.即key为Int类型.错误的原因就是你用Int类型的初始化了key,现在又用String类型的取.所以会报该编译错误.

正确写法:

let dictKeysArray = dict.keys

或者将String改成Int.

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Cannot find an initializer for type '[(String)]' that accepts an argument list of type '(LazyForward