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Merge pull request #239 from TheLittleBoy/patch-3

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代码编写错误修正
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ChildhoodAndy
2014-07-06 14:25:58 +08:00
parent 2037c4947f 32974ed3a3
commit 147a520665
1 changed files with 1 additions and 1 deletions
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source/chapter2/14_Initialization.md
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@ -158,7 +158,7 @@ class SurveyQuestion {
let cheeseQuestion = SurveyQuestion(text: "Do you like cheese?") let cheeseQuestion = SurveyQuestion(text: "Do you like cheese?")
cheeseQuestion.ask() cheeseQuestion.ask()
// 输出 "Do you like cheese?" // 输出 "Do you like cheese?"
cheeseQuestion.response = "Yes, I do like cheese. cheeseQuestion.response = "Yes, I do like cheese."
``` ```
调查问题在问题提出之后，我们才能得到回答。所以我们将属性回答`response`声明为`String?`类型，或者说是可选字符串类型`optional String`。当`SurveyQuestion`实例化时，它将自动赋值为空`nil`，表明暂时还不存在此字符串。 调查问题在问题提出之后，我们才能得到回答。所以我们将属性回答`response`声明为`String?`类型，或者说是可选字符串类型`optional String`。当`SurveyQuestion`实例化时，它将自动赋值为空`nil`，表明暂时还不存在此字符串。