ios - append 功能无法快速工作

Question

我正在尝试编写一个函数来将内容 append 到值数组然后将它们打印出来，但是当我在调用我的函数后将其打印出来时它返回 __lldb_expr_444.taste？!这是我的代码:

  // Playground - noun: a place where people can play

import UIKit

struct taste {
var TheName = "blankName"

var TheDesc = "blankDesc"
}




var data = [taste]()


func addFruit(name:String,desc:String) {
data.append(taste(TheName: name as String, TheDesc: desc as String))


}

addFruit("cherry", "sweet")

println(data)

我做错了什么？

Answer 1

您需要采用 Printable 协议(protocol)并实现返回文本结构表示的描述计算变量。

struct taste: Printable {

  var TheName = "blankName"
  var TheDesc = "blankDesc"

  var description: String {
    return "TheName: \(TheName); TheDesc: \(TheDesc)"
  }
}