ios - Swift Error: Variable used within its own initial value

Question

When I'm initializing an instance of an entity I'm getting the error Variable used within its own initial value.

Here is the code throwing the error:

class func buildWordDefinition (word:String, language:Language, root:TBXMLElement) -> WordDefinition
    {
        let word = WordDefinition(word: word, language: language)

The error points at the word variable.

Here is the WordDefinition class:

class WordDefinition {
    let word: String
    let language: Language

    init(word: String, language:Language)
    {
        self.word = word
        self.language = language
    }
}

What does this error mean ?

score 78 · Accepted Answer

您正在声明一个名为的常量word，并尝试使用具有相同名称的参数来初始化它。编译器尝试使用刚刚声明的常量来分配它自己的初始值，而不是使用参数。

score 22 · Accepted Answer

如果在展开文本时错过了相同的错误，我也遇到了同样的错误。

通过添加如果解决了上述问题。

score 11 · Accepted Answer

您正在重新定义一个word与函数中的参数同名的常量

class func buildWordDefinition (word:String, language:Language, root:TBXMLElement) -> WordDefinition
{
    // same name as the parameter here
    let word = WordDefinition(word: word, language: language)
}

score 7 · Accepted Answer

您有一个word在范围内调用的函数参数，并且您正在尝试创建一个具有相同名称的常量。将常量命名为word.

ios - Swift Error: Variable used within its own initial value

4 回答 4

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