swift - 如果字典类型是 [String : Any], 我能得到特定值的值吗？

Question

let josmith = [["Name": "Joe Smith"], ["Height": 42], ["SE": "YES"], ["Guardian Name(s)": "Jim and Jan Smith"]]

如何获取 Int 值 42？

Answer 1

您已经创建了一个字典数组，例如 [[String:Any]]。你说你想要一本字典，[String:Any]，所以改为像这样构造它(请注意，不需要将元素放在新行上，它只是有助于提高可读性):

let josmith = ["Name": "Joe Smith",
               "Height": 42, 
               "SE": "YES", 
               "Guardian Name(s)": "Jim and Jan Smith"]

然后像这样访问它:

if let fortyTwo = josmith["Height"] as? Int {
   // fortyTwo == 42
} else {
   // josmith did not contain "Height" or it wasn't an Int
}