是否可以在Swift中使用字典初始化结构？

Question

Swift-3

 struct Book {
        var title: String
        var description: String
        var price: Float
    }

我有Book结构，我想从字典

初始化

var book: Book? = ["Title": "Harry Poter", "Description": "Fantasy Novel", "Price": 190]

可以在Swift中做到吗？

Answer 1

尝试为您的结构制作合适的init（），如马丁所说，并根据您的要求使用它：

struct Book {
    var title: String
    var description: String
    var price: Int
}

extension Book {
    init(book : Dictionary<String,Any>){
        title = book["Title"] as? String ?? ""
        description = book["Description"] as? String ?? ""
        price = book["Price"] as? Int ?? 0
    }
}

let dict = ["Title": "Harry Poter", "Description": "Fantasy Novel", "Price": 190] as [String : Any]
var book: Book? = Book(book: dict)
print(book!)