去除服务器返回字符串里转义字符的方法

NSMutableString *str = [NSMutableString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];

    [str deleteCharactersInRange:NSMakeRange(0, 1)];

    [str deleteCharactersInRange:NSMakeRange(str.length-1, 1)];

    NSString *character = nil;

    for (int i = 0; i<str.length; i++) {

        character = [str substringWithRange:NSMakeRange(i, 1)];

        if ([character isEqualToString:@"\\"]) {

            [str deleteCharactersInRange:NSMakeRange(i, 1)];

            i--;

        }

    }