处理URL中的中文等字符，计算含有中英文的字符串的长度

使用ASIHttpRequest进行网络请求的时候，如果包含的参数中含有中文，可调用如下方法对汉字进行处理

- (NSString*)URLEncode:(NSString *)originalString{

    NSArray *escapeChars = [NSArray arrayWithObjects:@";" , @"/" , @"?" , @":" ,

                            @"@" , @"&" , @"=" , @"+" ,    @"$" , @"," ,

                            @"!", @"'", @"(", @")", @"*", nil];

    

    NSArray *replaceChars = [NSArray arrayWithObjects:@"%3B" , @"%2F", @"%3F" , @"%3A" ,

                             @"%40" , @"%26" , @"%3D" , @"%2B" , @"%24" , @"%2C" ,

                             @"%21", @"%27", @"%28", @"%29", @"%2A", nil];

    

    int len = [escapeChars count];

    

    NSMutableString *temp = [[originalString

                              stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]

                             mutableCopy];

    

    int i;

    for (i = 0; i < len; i++) {

        

        [temp replaceOccurrencesOfString:[escapeChars objectAtIndex:i]

                              withString:[replaceChars objectAtIndex:i]

                                 options:NSLiteralSearch

                                   range:NSMakeRange(0, [temp length])];

    }

    

    NSString *outStr = [NSString stringWithString: temp];

    

    return outStr;

}

 

计算含有中英文的字符串的长度（如输入：你好，字符串长度应为4）：

- (int)getToInt:(NSString*)strtemp

{

    NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);

    NSData* da = [strtemp dataUsingEncoding:enc];

    NSLog(@"------%d",[da length]);

    return [da length];

}