AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

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:nil constructingBodyWithBlock:^(id  _Nonnull formData) {

//        NSData *data = UIImagePNGRepresentation(image);

NSData *data = UIImageJPEGRepresentation(image, 0.1f);

//上传的参数(上传图片，以文件流的格式)

//注释：FileData：图片文件

//注释：name：上传参数名  （必须与后台定义上床参数对应）

//注释：fileName：图片名（可随意写）

//注释：mimeType：类型



[formData appendPartWithFileData:data

name:@"headerImg"

fileName:@"headerImg.png"

mimeType:@"image/jpeg"];

} progress:^(NSProgress * _Nonnull uploadProgress) {

//上传进度

NSLog(@"uploadProgress:%@",uploadProgress);

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

//上传成功

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

//上传失败

}];