ios - NSMutableURLRequest用空格替换“+”

我正在向服务器NSMutableURLRequest发送请求，如下所示，该问题之一是电话号码并带有“+”号，该问题已消除。

// Create the request.
    NSMutableURLRequest *theRequest=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:myURL ]
                                                            cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                        timeoutInterval:30.0];
    /**
     add post
     ****/
    [theRequest  setHTTPMethod:@"POST"];

    NSString *encodedfullNumberFinal= [ fullNumberFinal stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    NSString *append2URL=[NSString stringWithFormat:@"deviceType=%d&token=%@&mobileNumber=%@&code=%@",
                          1, token,

                          encodedfullNumberFinal
                          ,myBid
                          ];



    [theRequest setHTTPBody:[append2URL

                             dataUsingEncoding:NSUTF8StringEncoding /*NSUnicodeStringEncoding*/]];


    // create the connection with the request
    // and start loading the data
    NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    if (theConnection) {
        // Create the NSMutableData to hold the received data.
        // receivedData is an instance variable declared elsewhere.
        receivedData = /*[*/[NSMutableData data] /* retain]*/;
    } else {
        // Inform the user that the connection failed.

    }

注意，表单服务器端我正在使用Tomcat和Java。
任何建议如何保留带有“+”号的参数？

最佳答案

问题在于标准stringByAddingPercentEscapesUsingEncoding对加号不起作用。不过，Core Foundation的CFURLCreateStringByAddingPercentEscapes可为您提供更多控制权。我使用的NSString类别提供了CFURLCreateStringByAddingPercentEscapes的简单接口:

@implementation NSString (UrlEncode)

+ (NSString *)stringByAddingPercentEscapesFor:(NSString *)string
                legalURLCharactersToBeEscaped:(NSString *)legalURLCharactersToBeEscaped
                                usingEncoding:(NSStringEncoding)encoding
{
    return CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
                                                                     (CFStringRef)string,
                                                                     NULL,
                                                                     (CFStringRef)legalURLCharactersToBeEscaped,
                                                                     CFStringConvertNSStringEncodingToEncoding(encoding)
                                                                     ));
}

- (NSString *)stringByAddingPercentEscapesFor:(NSString *)legalURLCharactersToBeEscaped
                                usingEncoding:(NSStringEncoding)encoding
{
    return [NSString stringByAddingPercentEscapesFor:self
                       legalURLCharactersToBeEscaped:legalURLCharactersToBeEscaped
                                       usingEncoding:encoding];
}

- (NSString *)stringByAddingPercentEscapesForURLParameterUsingEncoding:(NSStringEncoding)encoding
{
    return [NSString stringByAddingPercentEscapesFor:self
                       legalURLCharactersToBeEscaped:@":/?@!$&'()*+,;="
                                       usingEncoding:encoding];
}

@end

然后，我可以使用stringByAddingPercentEscapesForURLParameterUsingEncoding而不是stringByAddingPercentEscapesUsingEncoding，并且加号也将被转义。