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)
最佳答案
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()
}
关于ios - 当我们快速从 Presented ViewController 转到 Previous ViewController 时调用哪个方法,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53131637/