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iOS里实现multipart/form-data格式上传文件
iOS里实现multipart/form-data格式上传文件

项目中设置

    NSString *kHttpRequestHeadContentTypeValueMultipart = @"multipart/form-data; boundary= fgejigjiejigest";
    NSString *kHttpRequestHeadContentTypeKey = @"Content-Type";
    NSString *kHttpRequestHeadBoundaryValue = @"fgejigjiejigest";
    NSString *kHttpRequestContentDisposition = @"Content-Disposition: form-data";

    NSString *urlString = @"Your Address";
    NSURL *url = [NSURL URLWithString:urlString];
    
    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration];

    NSMutableURLRequest *mutableRequest = [NSMutableURLRequest requestWithURL:url];
    mutableRequest.HTTPMethod = @"POST";
    [mutableRequest addValue:kHttpRequestHeadContentTypeValueMultipart forHTTPHeaderField:kHttpRequestHeadContentTypeKey];

    NSString *body = [NSString stringWithFormat:@"--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"Identification", @"Identification对应的字段值"];
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"appuserIdStr",@"appuserIdStr对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"arrivalTime",@"arrivalTime对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"billCommodityStr",@"billCommodityStr对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"billTime",@"billTime对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"day",@"day对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"freight",@"freight对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"isStages",@"isStages对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"billByStagesStr",@"billByStagesStr对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"logisticsNum",@"logisticsNum对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"mobilePhone",@"mobilePhone对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"remarks",@"remarks对应的字段值"]];
    
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"\r\n\r\n%@", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"state",@"state对应的字段值"]];
    //这里是要上传图片了，注意上传图片你的格式
    body = [body stringByAppendingString:[NSString stringWithFormat:@"\r\n--%@\r\n%@; name=\"%@\"; filename=\"%@\" Content-Type=image/jpeg\r\n\r\n", kHttpRequestHeadBoundaryValue, kHttpRequestContentDisposition, @"files", @"WechatIMG1557.jpeg"]];

    NSMutableData *data = [NSMutableData data];
    [data appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];
    NSString *imagePath = [[NSBundle mainBundle]pathForResource:@"WechatIMG1557.jpeg" ofType:nil];
    NSData *imageData = [[NSData alloc]initWithContentsOfFile:imagePath];
    [data appendData:imageData];
    [data appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", kHttpRequestHeadBoundaryValue] dataUsingEncoding:NSUTF8StringEncoding]];
    mutableRequest.HTTPBody = data;
    [mutableRequest setValue:[NSString stringWithFormat:@"%lu", (unsigned long)data.length] forHTTPHeaderField:@"Content-Length"];
    NSURLSessionUploadTask *task = [session uploadTaskWithRequest:mutableRequest fromData:nil completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if (!error) {
            NSError *errorError;
            id dataObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&errorError];
          
            if ([dataObject isKindOfClass:[NSDictionary class]]) {
                NSDictionary *dict = (NSDictionary *)dataObject;
                NSInteger code = [[dict valueForKey:@"code"] integerValue];
                NSDictionary *resultDict = [dict valueForKey:@"result"];
                
                if (code == 200 && resultDict.count) {
                    [SVProgressHUD showSuccessWithStatus:@"成功"];
                    NSLog(@"%@",dataObject);
                    //进入相应的界面处理中
                    dispatch_async(dispatch_get_main_queue(), ^{
                        //回调或者说是通知主线程刷新
                    });
                    
                }else{
                    [SVProgressHUD showErrorWithStatus:@"失败"];
                }
            }else{
                [SVProgressHUD showSuccessWithStatus:@"失败"];
            }
        }else{
            NSLog(@"%@",error);
            [SVProgressHUD showErrorWithStatus:@"由于网络原因发送失败,请调整网络后重试"];
        }
        //NSLog(@"%@",response);
    }];
    [task resume];

注意：
①还有一个是上传文件的格式，上面只弄了一个上传图片的
②上面是很傻瓜的办法，但是也可以总结一下使用For循环来添加body

以上！！！

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