上下文类型'表情符号'不能与数组文字一起使用

Question

我正在尝试按照 App Development with Swift （第4章表格视图）中的练习进行练习。

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

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

但是这行代码会引发错误：

  

上下文类型“表情符号”不能与数组文字一起使用。

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。但是你将var声明为表情符号类型的数组。

Answer 2

这更清楚地显示了解决方案：

var emojis: [Emoji] = [Emoji(symbol: "", 
                             name: "Grinning Face", 
                             description: "A typical smiley face.",
                             usage: "happiness"), 
                       Emoji(symbol: "", 
                            name: "Confused Face", 
                            description: "A confused, puzzled face.", 
                            usage: "unsure what to think; displeasure")]