Question

我想将图像发送到运行.Net的Web服务器，而不是Restful。

我已经尝试了很多东西来将图像转换为字符串然后发送它。
就像使用initWithData：encoding：并尝试通过此问题中给出的方法将图像数据转换为base64encodedstring < / p>

iPhone to MS SQL Image Data Type Conversion Question

但没有运气。

然后我想在facebook api上查看在Facebook墙上上传图片。
使用本教程，图片可以上传到Facebook

http://www.raywenderlich.com/1626/how-to-post-to-a-users-wall-upload-photos-and-add-a-like-button-from-your-iphone-app

但问题是，它使用asihttprequest在Facebook墙上发送数据，我无法看到请求中的原始数据将上传图像。任何人都可以帮助我。

Answer 1

我在我的最后尝试过。首先我转换为base64encoding，如下所示：

NSString *str64;

        if(Image){
            NSData *imageData = UIImageJPEGRepresentation(Image,0.75);
            str64 = [imageData base64Encoding];
        }

然后我添加到字典中，然后将该字典添加到数组中，以便我可以将其作为请求主体中的JSON字符串传递。

NSMutableArray * ParaArray = [[NSMutableArray alloc] init];

    NSDictionary *ParaDictionary=[NSDictionary dictionaryWithObjectsAndKeys:
                                  [NSString stringWithFormat:@"%@",Userid], @"userid",
                                  [NSString stringWithFormat:@"%@",[Imagename URLEncodedString]], @"imagename",
                                  [NSString stringWithFormat:@"%@",DateNTime], @"datetime", 
                                  [NSString stringWithFormat:@"%@",ImageLocation], @"imagelocation",
                                  str64,@"image",
                                  nil]; // set the parameter


    [ParaArray addObject:ParaDictionary];

使用ASIFormDataRequest后，我使用此代码段将图像发送到服务器：

ASIFormDataRequest *request = [[ASIFormDataRequest alloc] initWithURL:[NSURL URLWithString:urlString]];

    [request setPostValue:[ParaArray JSONRepresentation]  forKey:@"bulk_data"];

    //[ParaDictionary release];
    [ParaArray release];

    [request setTimeOutSeconds:20];


    [request startSynchronous];

它对我来说很好。我希望它对你也有帮助。

数据以字符串的形式传递，我们可以通过复制粘贴它们直接使用base64Encoding方法。虽然你可能知道他们仍然在这里：

- (NSString *) base64Encoding {
return [self base64EncodingWithLineLength:0];
}

- (NSString *) base64EncodingWithLineLength:(NSUInteger) lineLength {
const unsigned char *bytes = [self bytes];
NSMutableString *result = [NSMutableString stringWithCapacity:[self length]];
unsigned long ixtext = 0;
unsigned long lentext = [self length];
long ctremaining = 0;
unsigned char inbuf[3], outbuf[4];
unsigned short i = 0;
unsigned short charsonline = 0, ctcopy = 0;
unsigned long ix = 0;

while( YES ) {
    ctremaining = lentext - ixtext;
    if( ctremaining <= 0 ) break;

    for( i = 0; i < 3; i++ ) {
        ix = ixtext + i;
        if( ix < lentext ) inbuf[i] = bytes[ix];
        else inbuf [i] = 0;
    }

    outbuf [0] = (inbuf [0] & 0xFC) >> 2;
    outbuf [1] = ((inbuf [0] & 0x03) << 4) | ((inbuf [1] & 0xF0) >> 4);
    outbuf [2] = ((inbuf [1] & 0x0F) << 2) | ((inbuf [2] & 0xC0) >> 6);
    outbuf [3] = inbuf [2] & 0x3F;
    ctcopy = 4;

    switch( ctremaining ) {
        case 1:
            ctcopy = 2;
            break;
        case 2:
            ctcopy = 3;
            break;
    }

    for( i = 0; i < ctcopy; i++ )
        [result appendFormat:@"%c", encodingTable[outbuf[i]]];

    for( i = ctcopy; i < 4; i++ )
        [result appendString:@"="];

    ixtext += 3;
    charsonline += 4;

    if( lineLength > 0 ) {
        if( charsonline >= lineLength ) {
            charsonline = 0;
            [result appendString:@"\n"];
        }
    }
}

return [NSString stringWithString:result];
}

如何打印ASIHTTPRequest的原始数据

1 个答案: