url 转码

//URL解码

//-(NSString *)URLDecodedString:(NSString *)str

//{

//    NSString *decodedString=(__bridge_transfer NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(NULL, (__bridge CFStringRef)str, CFSTR(" "), CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));

//    

//    return str;

//}

//-(NSString*)UrlValueEncode:(NSString*)str

//{

//    NSString *result = (__bridge_transfer NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,

//                                                                           (__bridge CFStringRef)str,

//                                                                           NULL,

//                                                                           CFSTR("!*'();:@&=+$,/?%#[]"),

//                                                                           kCFStringEncodingUTF8);

//    return result;

//}

////utf8解码，空格解码

//-(NSString *)decodeFromPercentEscapeString:(NSString *) input

//{

//    NSMutableString *outputStr = [NSMutableString stringWithString:input];

//    [outputStr replaceOccurrencesOfString:@"+"

//                               withString:@" "

//                                  options:NSLiteralSearch

//                                    range:NSMakeRange(0, [outputStr length])];

//    

//    return [outputStr stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

//}

+(NSString*)URLDecodedString:(NSString*)str

{

    NSString *result = [[str stringByReplacingOccurrencesOfString:@"%0D%0A" withString:@""] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    return [result stringByReplacingOccurrencesOfString:@"+" withString:@" "];

}