NSString剥离常规\转义字符如何? [英] NSString strip regular \ escape characters how?

问题描述

我需要一段有效的代码来去除转义字符.这是常规的转义字符，而不是HTML的转义字符.

I need an efficient piece of code that strips escape characters. This is regular escapes not HTML escape characters.

示例:"\"，"\\\\"，"\"，"\\"

Example: "\"", "\\\\", "\", "\\"

我想要一种通用算法来剥离任何类型的转义序列.

I want a general algorithm to strip any kind of escape sequences.

可以使用诸如正则表达式之类的任何实用程序.

Could use any utility like regular expression.

  (NSString*) unescape:(NSString*) string {

      ....
  }

这是我写的答案:

-(NSString*) unescape:(NSString*) string
{

    for(int i = 0; i < string.length; i++) {
        char a = [string characterAtIndex:i];
        if([string characterAtIndex:i] == '\\' ) {
            string = [string stringByReplacingCharactersInRange:NSMakeRange(i,1) withString:@""];
        }

    }
    return string;
}

推荐答案

尝试使用以下代码进行HTML转义

Try to use below code for HTML escape

(NSString*) unescape:(NSString*) string 
{
    return [string stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
}

常规转义

(NSString*) unescape:(NSString*) string 
{    
    return [string stringByReplacingOccurrencesOfString:@"\\\"" withString:@"\""];
}

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