iOS Post上传图片, 文件流的形式

最近看到群里很多小伙伴有问上传图片服务器收不到, 解析不了. 可以说就一个属性 ContentType , 不论你使用第三方的AFN, 还是自己封装NSURLSesstion. 都需要把ContentType 设置和后台的解析方式一样(可能术语不是很标准, 总之就这个意思哈,谅解)

下面贴两段上传图片代码不过可能只是针对我的服务器. 只要和后台同学沟通好就行了

一, 自己封装afn的请求

**********.h

/**
 *  上传图片文件
 *
 *  @param URL        请求地址
 *  @param parameters 请求参数
 *  @param images     图片数组
 *  @param name       文件对应服务器上的字段
 *  @param fileName   文件名
 *  @param mimeType   图片文件的类型,例:png、jpeg(默认类型)....
 *  @param progress   上传进度信息
 *  @param success    请求成功的回调
 *  @param failure    请求失败的回调
 *
 *  @return 返回的对象可取消请求,调用cancle方法
 */
+ (WWURLSessionTask *)uploadWithURL:(NSString *)URL parameters:(NSDictionary *)parameters images:(NSArray<UIImage *> *)images name:(NSString *)name fileName:(NSString *)fileName mimeType:(NSString *)mimeType progress:(HttWWrogress)progress success:(HttpRequestSuccess)success failure:(HttpRequestFailed)failure showHub:(BOOL)showHub;

*********.m

+ (WWURLSessionTask *)uploadWithURL:(NSString *)URL parameters:(NSDictionary *)parameters images:(NSArray<UIImage *> *)images name:(NSString *)name fileName:(NSString *)fileName mimeType:(NSString *)mimeType progress:(HttWWrogress)progress success:(HttpRequestSuccess)success failure:(HttpRequestFailed)failure showHub:(BOOL)showHub
{
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
    NSMutableDictionary *dic = [[NSMutableDictionary alloc]initWithDictionary:parameters];
    AFHTTPSessionManager *manager = [self createAFHTTPSessionManager:showHub];
    return [manager POST:URL parameters:dic constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        
        //压缩-添加-上传图片
        [images enumerateObjectsUsingBlock:^(UIImage * _Nonnull image, NSUInteger idx, BOOL * _Nonnull stop) {
            NSData *imageData = UIImageJPEGRepresentation(image, 0.5);
            [formData appendPartWithFileData:imageData name:name fileName:[NSString stringWithFormat:@"%@%ld.%@",fileName,idx,mimeType?mimeType:@"jpeg"] mimeType:[NSString stringWithFormat:@"image/%@",mimeType?mimeType:@"jpeg"]];
        }];
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        //上传进度
        progress ? progress(uploadProgress) : nil;
        
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
        [SVProgressHUD dismiss];
        success(responseObject);
        WWLog(@"responseObject 上传成功= %@",responseObject);
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
        [SVProgressHUD dismiss];
        failure ? failure(error) : nil;
        WWLog(@"error = %@",error);
    }];
}

二 . AFN 经典图片上传

　　//此body是向后台传的参数, 因为是上传图片, 所以只给个图片名就够了, 这个和后台去问

    NSDictionary * body = @{@"category":@"user",@"file":@"HeadImg"};

    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

    //ContentType设置

    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/html",@"image/jpeg",@"image/png",@"application/octet-stream",@"text/json",nil];

    

    manager.requestSerializer= [AFHTTPRequestSerializer serializer];

    manager.responseSerializer= [AFHTTPResponseSerializer serializer];

    

    [manager POST:url parameters:body constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {

//把image  转为data , POST上传只能传data

        NSData *data = UIImagePNGRepresentation(image);

        //上传的参数(上传图片，以文件流的格式)

        [formData appendPartWithFileData:data

   

                                    name:@"file"

         

                                fileName:@"gauge.png"

         

                                mimeType:@"image/png"];

        

    } progress:^(NSProgress * _Nonnull uploadProgress) {

 

    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

　　//请求成功的block回调

        NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingAllowFragments error:nil];

        NSLog(@"上传成功%@",dic);

             

    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

          NSLog(@"上传失败%@",error);

    }];

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