Question

我有一个问题，我正在开发一个应用程序，该应用程序显示了我以前的ViewController(FilterVC)的{{1}}。我将过滤器数据存储在这样的委托方法中

ViewController(ItemsVC)

并单击按钮，我成功地将数据传递给了我以前的protocol FilterVCDelegate: class { func didSelectedFilters(_ sender: FilterVC, with selectedFilters: [String:Any]) }，如下所示：-

ItemVC

ItemVC：-

@IBAction func applyButtonAction(_ sender: UIButton) {
    printD(selectedFilters)
    self.delegate?.didSelectedFilters(self, with: self.selectedFilters)
    self.dismiss(animated: true, completion: nil)
}

这是在调用api方法：-

func didSelectedFilters(_ sender: FilterVC, with selectedFilters: [String : Any]) {
    self.currentFilters = selectedFilters
    printD("selectedFilters \(currentFilters)") // successfully get data from previous vc
}

但是在func searchFromLatestRelease() { // let param: [String:Any] = ["page": pageNo, "search_term": forSearch, "order_by": "date", "token": commonClass.sharedInstance.userToken ?? ""] let param: [String:Any] = ["price_range": currentFilters["price"] as? [String] as Any, "page": "0", "is_rating": currentFilters["Product Rating"] as? [String] as Any] printD("param: \(param)") Alamofire.request(Constants.API.url("search"), method: .post, parameters: param, encoding: URLEncoding.httpBody, headers: nil).responseJSON { (response:DataResponse<Any>) in guard let json = response.result.value as? [String:Any] else {return} printD(json) guard let status = json["status"] as? Int else {return} printD(status) if status == 1 { if self.pageNo == 0 { self.sneakers = [] } guard let data = json["data"] as? [[String:Any]] else { return} printD(data) for dic in data { self.sneakers.append(sneakerModel(response: dic)) } self.reloadData() } else { commonClass.sharedInstance.showErrorMessage(json["msg"] as? String ?? "Server error. Please try again later.") } } }和ViewWillAppear中称呼它是行不通的。现在，我需要使用这些文件管理器作为参数来调用 API 。刷新数据并成功在ViewDidLoad上显示过滤的项目。 ViewController LifeCycle中有8个ItemsVC，但我不是用来刷新我的ViewControllers来显示过滤后的数据的。请帮忙吗？

这是我在控制台中得到的currenFilter，如下所示：-

ItemVC

（lldb）

Answer 1

viewDidLoad在启动vc时调用一次，ViewWillAppear / viewDidAppear在模型关闭后调用，您需要

func didSelectedFilters(_ selectedFilters: [String : Any]) {
    self.currentFilters = selectedFilters
    self.searchFromLatestRelease()
}

快速地从Presented ViewController转到Previous ViewController时调用哪种方法

1 个答案: