ios - 当我们快速从 Presented ViewController 转到 Previous ViewController 时调用哪个方法

Question

我有一个问题，我正在开发一个应用程序，在该应用程序中，我展示了一个来 self 之前的 ViewController(ItemsVC) 的 ViewController(FilterVC)。我像这样将过滤器数据存储在我的委托(delegate)方法中

protocol FilterVCDelegate: class {
func didSelectedFilters(_ sender: FilterVC, with selectedFilters: [String:Any])
}

然后单击按钮，我成功地将数据传递到我之前的 ItemVC，如下所示:-

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

ItemVC:-

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

这里是调用 api 方法:-

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.")
        }
    }
}

但它不会工作在 ViewWillAppear 和 ViewDidLoad 中调用它。现在我需要使用这些文件管理器作为调用 API 的参数。刷新数据并在 ItemsVC 上成功显示筛选的项目。 ViewController LifeCycle 中有 8 个 ViewControllers 但我没有，它用于刷新我的 ItemVC 以显示过滤后的数据。请帮忙？

在这里，我在控制台中获取我的 currenFilter，如下所示:-

selectedFilters ["Product Rating": ["5", "4", "3", "2", "1"], "Price": ["$00.00 - $200.00", "$200.00 - $400.00", "$600.00 - $800.00", "$800.00 - $1000.00", "$1000.00 AND OVER"]]

(数据库)

Answer 1

viewDidLoad在vc启动时调用一次，ViewWillAppear/viewDidAppear在model dismiss后调用，需要

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