ios - 使用 Array 而不是 NSArray 时出现错误 "ambiguous reference to member subscript"

Question

当我尝试访问数组类型值然后出现错误时，我在可能包含数组类型值的字典中收到类似“对成员下标的模糊引用”的错误。请检查以下代码。

var occupations = [
"Malcolm": "Captain",
"Kaylee": "Mechanic",
"Layme": ["Engineer", "Docter"] 
] as [String : Any]


occupations["Jayne"] = "Public Relations"
var arrOfLayme = occupations["Layme"] as! Array //getting error here, If I use NSArray instead of array all will work as expacted
print(valueOcc[0])

当我使用 NSArray 类型时，此代码运行良好，如下行所示，我想以纯粹的快速方式进行，不想添加 Objective-c。

var arrOfLayme = occupations["Layme"] as! NSArray

Answer 1

试试这个:

var occupations:[String:Any] = [
    "Malcolm": "Captain",
    "Kaylee": "Mechanic",
    "Layme": ["Engineer", "Docter"]
    ]

occupations["Jayne"] = "Public Relations"


var arrOfLayme = occupations["Layme"] as! [String]
print(arrOfLayme)

//More safe
if let arr = occupations["Layme"] as? [String] {
    print(arr)
}