在Objective-C中替换字符串中的多个字符？ [英] Replace multiple characters in a string in Objective-C?

问题描述

在PHP中，我可以这样做：

In PHP I can do this:

$new = str_replace(array('/', ':', '.'), '', $new);

...替换所有字符实例/ :.使用空白字符串（删除它们）

...to replace all instances of the characters / : . with a blank string (to remove them)

我可以在Objective-C中轻松完成吗？或者我必须自己动手？

Can I do this easily in Objective-C? Or do I have to roll my own?

目前我正在多次调用 stringByReplacingOccurrencesOfString ：

strNew = [strNew stringByReplacingOccurrencesOfString:@"/" withString:@""];
strNew = [strNew stringByReplacingOccurrencesOfString:@":" withString:@""];
strNew = [strNew stringByReplacingOccurrencesOfString:@"." withString:@""];

谢谢，

亚光

Thanks,
matt

推荐答案

执行此操作的效率稍低：

A somewhat inefficient way of doing this:

NSString *s = @"foo/bar:baz.foo";
NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"/:."];
s = [[s componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @""];
NSLog(@"%@", s); // => foobarbazfoo

查看 NSScanner 和 - [NSString rangeOfCharacterFromSet：...] 如果你想更有效地做这件事。

Look at NSScanner and -[NSString rangeOfCharacterFromSet: ...] if you want to do this a bit more efficiently.

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