arrays - 上下文类型 'Emoji' 不能与数组文字一起使用

Question

我正在尝试完成 App Development with Swift 一书中的练习(第 4 章 Tabel View)。

练习告诉我将 [Emoji] 类型的属性“emojis”添加到 viewControllerClass。代码如下:

 var emojis: [Emoji] = [
        [Emoji(symbol: "😀", name: "Grinning Face", description: "A typical smiley face.", usage: "happiness"),
         ]
    ]

但是这行代码抛出错误:

Contextual type "Emoji" cannot be used with array literal.

Answer 1

试试这个，

var emojis: [Emoji] = [Emoji(symbol: "😀", name: "Grinning Face", description: "A typical smiley face.", usage: "happiness")]

您正在创建数组数组。但是你是把 var 声明为 Emoji 类型的数组。