From d1309d55224d70ce661f839cb72c3dd16b1d6b1f Mon Sep 17 00:00:00 2001 From: Xwoder Date: Wed, 12 Aug 2015 00:19:08 +0800 Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=E5=9F=BA=E7=A1=80=E9=83=A8?= =?UTF-8?q?=E5=88=86=E4=BB=A3=E7=A0=81?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- source/chapter2/01_The_Basics.md | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/source/chapter2/01_The_Basics.md b/source/chapter2/01_The_Basics.md index 5b458c8b..8d5a2ee7 100755 --- a/source/chapter2/01_The_Basics.md +++ b/source/chapter2/01_The_Basics.md @@ -631,12 +631,12 @@ if let constantName = someOptional { 你可以像上面这样使用可选绑定来重写`possibleNumber`这个例子： ```swift -if let actualNumber = possibleNumber.toInt() { - print("\(possibleNumber) has an integer value of \(actualNumber)") -} else { - print("\(possibleNumber) could not be converted to an integer") -} -// 输出 "123 has an integer value of 123" +if let actualNumber = Int(possibleNumber) { + print("\'\(possibleNumber)\' has an integer value of \(actualNumber)") +} else { + print("\'\(possibleNumber)\' could not be converted to an integer") +} +// 输出 "'123' has an integer value of 123" ``` 这段代码可以被理解为：