从字符串后删除字符和一切 [英] Remove Characters and Everything After from String

问题描述

我知道替换字符串的字符串，但是只有我知道确切地知道我想要删除。

I am aware of replacing Strings of a String, but that only works if I know exactly what I want to remove.

如果我有一个字符串，如下所示：

If I have a String like the following:

hi-there-this-is-a-test& feature = hi-there

"hi-there-this-is-a-test&feature=hi-there"

如何删除& feature及其后的所有内容？

How do I remove '&feature' and everything that comes after that?

任何帮助将非常感谢。提前感谢！

Any help would be greatly appreciated. Thanks in advance!

编辑：如果绝对需要使用REGEX，有人可以告诉我如何使用它吗？我知道这是10.7起，但我很好。更好的是String修剪或使用NSScanner的示例？

If absolutely necessary to use REGEX, could someone show me how to use it? I am aware it is 10.7 onwards but I'm fine with that. Even better, an example of String trimming or using the NSScanner?

再次感谢大家。

解决方案贴在下面是正确的，但导致了我的崩溃。这是我解决的问题：

The solution posted below is the correct one, but resulted in a crash for me. This is how I solved the problem:

NSString *newString = [[oldString componentsSeparatedByString: @"&feature="] objectAtIndex:0];

推荐答案

p>

It can be done without REGEX like this:

NSString *string = @"hi-there-this-is-a-test&feature=hi-there";
    NSRange range = [string rangeOfString:@"&feature"];
    NSString *shortString = [string substringToIndex:range.location];

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