AFN上传图片

   AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
//    [manager.requestSerializer setValue:@"multipart/form-data" forHTTPHeaderField:@"Content-Type"];
    
    NSString *urlString = UpLoadUrl;
    NSData *imageData = UIImageJPEGRepresentation(image, 0.7);
    
    //post请求
    [manager POST:urlString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        formatter.dateFormat   = @"YYYY-MM-dd-hh:mm:ss:SSS";
        NSString *str = [formatter stringFromDate:[NSDate date]];
        NSString *fileName = [NSString stringWithFormat:@"%@.png", str];
        /*
         此方法参数
         1. 要上传的[二进制数据]
         2. 我这里的imgFile是对应后台给你url里面的图片参数，别瞎带。
         3. 要保存在服务器上的[文件名]
         4. 上传文件的[mimeType]
         */
        [formData appendPartWithFileData:imageData name:@"mfile" fileName:fileName mimeType:@"image/jpeg"];
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        float progress =  1.0 * uploadProgress.completedUnitCount/uploadProgress.totalUnitCount;
//        NSLog(@"上传图片进度%f",progress);
        
        //找到message大数组中对应数据以更改，加入上传进度
        NSString *who;
        int which = 0;
        NSString *file1 = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject stringByAppendingPathComponent:@"message.count"];
        if (![[NSFileManager defaultManager] fileExistsAtPath:file1]) {
        }else{
            
            NSMutableDictionary *countDic = [[NSMutableDictionary alloc]initWithContentsOfFile:file1];
//            NSLog(@"%@",countDic);
            NSString* time = [NSString stringWithFormat:@"%ld",timeStamp];
            NSMutableDictionary *valueDic = [countDic objectForKey: time];
            who = [valueDic objectForKey:@"to"];
            which = [[valueDic objectForKey:@"count"] intValue];
            NSData *userData = [[NSUserDefaults standardUserDefaults] objectForKey:K_USER_USERMESSAGE];
            MxmUserMessage *mxmUserModel = [NSKeyedUnarchiver unarchiveObjectWithData:userData];
            NSString *my = mxmUserModel.userName;
            
            NSString *file = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject stringByAppendingPathComponent:@"message.data"];
            if (![[NSFileManager defaultManager] fileExistsAtPath:file]) {
            }else{
                NSMutableDictionary *aDic = [[NSMutableDictionary alloc]initWithContentsOfFile:file];
                NSMutableArray *dataArr = [aDic objectForKey:my];
                
                for (int i = 0; i<dataArr.count; i++) {
                    NSMutableArray *smallArr = [dataArr objectAtIndex:i];
                    //下面三句只是为了拿到samllArr中每个字的key(每个字典的key都是相同的)
                    NSMutableDictionary *msgDic = [smallArr objectAtIndex:0];
                    NSArray *keyArr = msgDic.allKeys;
                    NSString *key = keyArr[0];
                    
                    if ([key isEqualToString:who]) {
                        
                        NSMutableDictionary *msgDic1 = [smallArr objectAtIndex:which -1];
                        NSMutableDictionary *keyDic = [msgDic1 objectForKey:key];
                        
                        [keyDic setObject:@"1" forKey:@"isSender"];
                        [keyDic setObject:[NSString  stringWithFormat:@"%f",progress] forKey:@"uploadProgress"];
                        [msgDic1 setObject:keyDic forKey:key];
                        [smallArr replaceObjectAtIndex:which -1 withObject:msgDic1];
                        [dataArr replaceObjectAtIndex:i withObject:smallArr];
                        [aDic setObject:dataArr forKey:my];
                        [aDic writeToFile:file atomically:YES];
//                        NSLog(@"加入了上传进度-- 第%d句,时间是%@",which,time);
                        dispatch_async(dispatch_get_main_queue(), ^{
                            
                            [[NSNotificationCenter defaultCenter]postNotificationName:@"loadDataSource" object:nil];
                        });
                    }
                }
            }
        }
        
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        NSString *errmsg = [responseObject objectForKey:@"errmsg"];
        NSString *mediaID = [responseObject objectForKey:@"mediaid"];
        
        if (mediaID && [errmsg isEqualToString:@"ok"]) {
            NSLog(@"上传成功");
        }
        NSString* urlStr= [NSString stringWithFormat:@"%@/%@",DownLoadUrl,mediaID];
        NSLog(@"发送的%@===%@",urlStr,path);
        if (your.length <36) {
            [vc sendMessageWithContent:urlStr localUrl:path type:type realTime:timeStamp];
        }else{
            JFGroupChatController *groupVC = [[JFGroupChatController alloc]init];
            [groupVC sendMessageWithContent:urlStr localUrl:path type:type realTime:timeStamp];
        }
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"请求失败：%@",error);
    }];