xcode 如何使 NSString 中的所有字符小写？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/7296267/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to make all characters lowercase in NSString?
提问by Will Coughlin
How would I go about making all characters in an NSString lowercase?
我将如何让 NSString 中的所有字符都小写？
回答by Abizern
NSStringhas a cunningly named lowercaseStringmethod.
NSString有一个巧妙命名的lowercaseString方法。
NSString *noCaps = [yourString lowercaseString];
Edited to add
编辑添加
If you are asking how to change the actualstring to be lowercase - you can't. NSStrings are immutable. They can't be changed after they have been created. If you want to change the string in place you should use an NSMutableString like so:
如果您询问如何将实际字符串更改为小写 - 您不能。NSStrings 是不可变的。它们在创建后无法更改。如果你想改变字符串，你应该像这样使用 NSMutableString ：
[aMutableString setString:[aMutableString lowercaseString]];
