ios - 用户默认 Swift

Question

我有提示 View (工具提示)。我希望每个下载应用程序在我的应用程序中显示 1 次。当用户下载应用程序时，此工具提示会显示然后关闭。当用户删除应用程序并再次下载工具提示时，应该会再次工作。

let options: AMTooltipViewOptions = .init(textColor: Color.guideSubTitle,
                                                  textBoxBackgroundColor: Color.guideScreenBackground,
                                                  textBoxCornerRadius: 8,
                                                  lineColor: Color.guideScreenBackground,
                                                  lineHeight: 15,
                                                  dotSize: 0,
                                                  focusViewRadius: 15,
                                                  focustViewVerticalPadding: 0,
                                                  focustViewHorizontalPadding: 0)
        AMTooltipView(options: options,
                      message: Localizable.scan_open_from_gallery + "\n" + Localizable.scan_clear,
                      focusView: content.openGalleryBtn, target: self)

我有 key

public var hintView: Bool {
        get {
            return setting.bool(forKey: Key.hintView)
        }
        set {
            setting.set(false, forKey: Key.hintView)
        }
    }

如何控制用户何时删除应用并再次下载

Answer 1

在 UserDefaults 中存储一个 bool 值.一旦用户卸载应用程序，数据将被删除。

在您的 AppDelegate.swift

let DEFAULTS = UserDefaults.standard
var isUserFirstTime = !DEFAULTS.bool(forKey: "isUserFirstLogin") // by default it will store false, so when the user opens the app for first time, isUserFirstTime = true.

然后在你的 didFinishLaunchingWithOptions里面功能

 if isUserFirstTime {
     // your code here to show toolbar
        } else {
            // dont show toolbar
        }
  // once you have completed the operation, set the key to true. 
  DEFAULTS.set(true, forKey: "isUserFirstLogin")