iOS 表单格式请求 formdata

-(void)updateImageHeadWithUserID:(NSString *)userID imageUrl:(UIImage *)imageUrl complete:(void (^)(id))completeBlock{

NSString *url = [NSString stringWithFormat:@"%@%@v1/system/updateImageHead",AFURL,userGateway];

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

NSMutableDictionary *body = [[NSMutableDictionary alloc]init];
body[@"userId"] = userID;

[self POST:url parameters:body constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
   
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    formatter.dateFormat            = @"yyyyMMddHHmmss";
    NSString *str                   = [formatter stringFromDate:[NSDate date]];
    NSString *fileName              = [NSString stringWithFormat:@"%@.png", str];
    
    NSData *data = [self zipNSDataWithImage:imageUrl];
    
    [formData appendPartWithFileData:data name:@"imageUrl" fileName:fileName mimeType:@"image/jpeg"];
    
} progress:^(NSProgress * _Nonnull uploadProgress) {

} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
    
    if (responseObject != nil) {
        NSString *success = responseObject[@"success"];
        if (success.intValue == 1) {
            // 保存沙盒
            NSString *path_document = NSHomeDirectory();
            NSString *imagePath = [path_document stringByAppendingString:@"/Documents/userHeadImage.png"];
            [UIImagePNGRepresentation(imageUrl) writeToFile:imagePath atomically:YES];
            
            if (completeBlock) {
                completeBlock(responseObject);
            }
        }else{
            NSString *msg = responseObject[@"msg"];
            [OJBProgressHUD OJBShowSvpErrorTitle:msg andTime:kNormalDelayTime andColor:YES];
        }

    }
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
    NSData *data = error.userInfo[@"com.alamofire.serialization.response.error.data"];
    if(data != nil){
        NSDictionary *errorDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
        // 处理异常
        NSString *message = errorDict[@"message"];
        NSArray *array = [message componentsSeparatedByString:@"Failed:"];
        [OJBProgressHUD OJBShowSvpErrorTitle:array[1] andTime:kNormalDelayTime andColor:YES];
    }else{
        [OJBProgressHUD OJBShowSvpErrorTitle:@"服务繁忙" andTime:kNormalDelayTime andColor:YES];
    }
}];

}