1
我想将String
转换为Array
,然后通过NSCountedSet
对重复值进行计数。addObjectsFromArray错误:如何将`Array <Character>`转换为`[AnyObject]`?
这些代码得到错误:
let str = "hello"
let ar = Array(str.characters)
let set = NSCountedSet()
set.addObjectsFromArray(ar)
错误:
error: cannot convert value of type 'Array<_Element>' (aka 'Array<Character>') to expected argument type '[AnyObject]'
set.addObjectsFromArray(ar)
我知道原因,所以如何Array<Character>
转换为[AnyObject]
?