NSURLSession， form-data 上传

    NSString *urlString = @"";
    NSURL *url = [NSURL URLWithString:urlString];
    NSData *imageData = [NSData dataWithContentsOfURL:url];
    
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://api.yundama.com/api.php?method=upload"]
                                                           cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                       timeoutInterval:10.0];
    NSArray *parameters = @[];
    NSString *boundary = @"----WebKitFormBoundary7MA4YWxkTrZu0gW";

    NSError *error;
    NSMutableString *body = [NSMutableString string];
    for (NSDictionary *param in parameters) {
        [body appendFormat:@"--%@\r\n", boundary];
        if (param[@"fileName"]) {
            NSDateFormatter *formatter=[[NSDateFormatter alloc]init];
            formatter.dateFormat=@"yyyyMMddHHmmss";
            NSString *str=[formatter stringFromDate:[NSDate date]];
            NSString *fileName=[NSString stringWithFormat:@"%@.gif",str];

            NSLog(@"file name : %@",fileName);
            [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"; filename=\"%@\"\r\n", param[@"name"], fileName];
            [body appendFormat:@"Content-Type: %@\r\n\r\n", param[@"contentType"]];
            if (error) {
                NSLog(@"%@", error);
            }
        } else {
            [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"\r\n\r\n", param[@"name"]];
            [body appendFormat:@"%@\n", param[@"value"]];
        }
    }
    NSString *end = [NSString stringWithFormat:@"\r\n--%@--\r\n",boundary];
    NSMutableData *requestData = [NSMutableData data];
    [requestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];
    [requestData appendData:imageData];
    [requestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];
    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:requestData];
    //设置HTTPHeader中Content-Type的值
    NSString *content=[[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",boundary];
    //设置HTTPHeader
    [request setValue:content forHTTPHeaderField:@"Content-Type"];
    //设置Content-Length
    [request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[requestData length]] forHTTPHeaderField:@"Content-Length"];

    [[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if (error) {
            NSLog(@"error : %@",error);
            [self postYunDaMaFail];
        } else {
            NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
            } else {
                //post打码失败结果
            }
        }
    }] resume];

//此处image是在项目中自取的image,读者注意自己拿到图片的方式,测试的话可以在项目中加入一张11.png的图片
    UIImage *image = [UIImage imageNamed:@"11.png"];
    //此处是对图片进行压缩,压缩的 比例是公司自己对于上传图片的标准要求
    NSData *imageData = UIImageJPEGRepresentation(image, 0.000001);
    
    //此处url为读者公司自己的服务器url
    NSString *url = @"------------------";
    
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]
                                                           cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                                                       timeoutInterval:30];
    request.HTTPMethod = @"POST";
    //分界线的标识符
    NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x";
    
    //分界线 --AaB03x
    NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];
    //结束符 AaB03x--
    NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];
    
    /*
     上传格图片格式：
     --AaB03x
     Content-Disposition: form-data; name="file"; filename="currentImage.png"
     Content-Type: image/png
     */
    //http body的字符串
    NSMutableString *body=[[NSMutableString alloc]init];
    //    //添加分界线，换行
    //    [body appendFormat:@"%@\r\n",MPboundary];
    //添加分界线，换行
    [body appendFormat:@"%@\r\n",MPboundary];
    //声明file字段，文件名为currentImage.png
    NSDateFormatter *formatter=[[NSDateFormatter alloc]init];
    formatter.dateFormat=@"yyyyMMddHHmmss";
    NSString *str=[formatter stringFromDate:[NSDate date]];
    NSString *fileName=[NSString stringWithFormat:@"%@.jpg",str];
    [body appendFormat:@"%@", [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@\"\r\n",fileName]];
    //声明上传文件的格式
    [body appendFormat:@"Content-Type: image/jpg\r\n\r\n"];
    
    NSLog(@"网络请求body:%@",body);
    //声明结束符：--AaB03x--
    NSString *end=[[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary];
    //声明myRequestData，用来放入http body
    NSMutableData *myRequestData=[NSMutableData data];
    //将body字符串转化为UTF8格式的二进制
    [myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];
    //将image的data加入
    [myRequestData appendData:imageData];
    //加入结束符--AaB03x--
    [myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];
    
    //设置HTTPHeader中Content-Type的值
    NSString *content=[[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY];
    //设置HTTPHeader
    [request setValue:content forHTTPHeaderField:@"Content-Type"];
    //设置Content-Length
    [request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[myRequestData length]] forHTTPHeaderField:@"Content-Length"];
    //设置http body
    [request setHTTPBody:myRequestData];
    
    
    //        NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration];
    NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfig delegate:self delegateQueue:nil];
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        //网络请求失败
        if (error != nil) {
            return;
        }
        //成功进行解析
        NSMutableDictionary * dic = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
        NSLog(@"%@--%@",dic, response);
    }];
    
    [task resume];

base64 上传

NSURL *damaURL = [NSURL URLWithString:[NSString stringWithFormat:@""]];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:damaURL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30];
    request.HTTPMethod = @"POST";
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
   // [request setValue:@"Bearer 9b1d173066bf4d32b9e1d0259d2fc26c" forHTTPHeaderField:@"Authorization"];
    NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:@""]];
    NSString *base64Image = [data base64EncodedStringWithOptions:0];
    NSDictionary *json = @{@"img_data":base64Image};
    request.HTTPBody = [NSJSONSerialization dataWithJSONObject:json options:NSJSONWritingPrettyPrinted error:nil];
// NSString *parms = [NSString stringWithFormat:@"img_data=%@", base64Image];
// request.HTTPBody = [parms dataUsingEncoding:NSUTF8StringEncoding];


    [[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if (error) {
            NSLog(@"MFLog: post image error - %@",error);
        } else {
            NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
        }
    }] resume];