文件的名字，多张的时候，不同，

  NSData *logoImageData = [logoDataArr objectAtIndex:0];

        [formData appendPartWithFileData:logoImageData name:@"pic03"fileName:@"d.jpg"mimeType:@""];

        

        NSData *imageData = [imageDataArr objectAtIndex:0];

        [formData appendPartWithFileData:imageData name:@"pic"fileName:@"a.jpg"mimeType:@""];

        NSData *imageData1 = [imageDataArr objectAtIndex:1];

        [formData appendPartWithFileData:imageData1 name:@"pic01"fileName:@"b.jpg"mimeType:@""];

        NSData *imageData2 = [imageDataArr objectAtIndex:2];

        [formData appendPartWithFileData:imageData2 name:@"pic02"fileName:@"c.jpg"mimeType:@""];