上传图片-AFN

- (void)httpRequestUploadMeHeadImageWithFile:(UIImage *)file UUID:(NSString *)UUID error:(void (^)(NSError *))err{
    NSString *url = [NSString stringWithFormat:@"%@图片上传地址"];
    NSDictionary *parametes;
    if ( UUID.length) {//图片参数，登录后的UUID,根据你参数添加所需要的参数
        parametes = @{@"UUID":UUID};
    }else{
        return ;
    }
    if (!file) {
        return;
    }
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];  //请求图片,请求网页时需要加入这句,因为AFN默认的请求的是json
//    application/json
      [manager.requestSerializer setValue:/**@"multipart/form-data"*/@"application/json" forHTTPHeaderField:@"Content-Type"]; //请求头
    [manager POST:url parameters:parametes constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {

        NSData *data = UIImagePNGRepresentation(file); //下面的方式也可以
        //                NSData *data = UIImageJPEGRepresentation(pic, 1.0);
        
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        // 设置时间格式
        formatter.dateFormat = @"yyyyMMddHHmmss";
        NSString *str = [formatter stringFromDate:[NSDate date]];
        NSString *fileName = [NSString stringWithFormat:@"%@.png", str];
        // 特别注意，这里的图片的名字不要写错，必须是你接口的图片的参数名字如我这里是file
        [formData appendPartWithFileData:data name:@"file" fileName:fileName mimeType:@"image/png"];
    } progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        NSLog(@"responseObject===>%@",responseObject);
        if (err) {
            err(nil);
        }
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"task------>%@error------> %@",task,error);
        if (err) {
            err(error);
        }
    }];
}