PROSAGA码农传奇-swift/objective-C-第二次用户进入应用程序时显示UIAlertController [关闭]

第二次用户进入应用程序时显示UIAlertController [关闭]

作者: 12345
发布时间: 2025-11-01 08:02:27 (1月前)
转自：

<div class =“post-text”itemprop =“text”> <p> <strong> Swift </strong> </p> <pre>
    <code>
      func application(_ application: UIApplication, 
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
    if let appearValue = UserDefaults.standard.object(forKey : "appearCount") as? Int {
       if appearValue + 1 == 2 {
          // showYourAlert
       } 
       UserDefaults.standard.set(appearValue + 1, forKey: "appearCount")
    } else {
        UserDefaults.standard.set(1, forKey: "appearCount")
    }

}

</code>
  </pre> <p> <strong> Objective-C </strong> </p> <pre>
    <code>
      - (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
    int appearCount = [[NSUserDefaults standardUserDefaults] objectForKey: @"appearCount"];
    if (appearCount) {
        [[NSUserDefaults standardUserDefaults] setValue: 1 forKey: @"appearCount"];
    } else {
        if (appearCount + 1 == 2) {
            // show alert
        }
        [[NSUserDefaults standardUserDefaults] setValue: appearCount + 1 forKey: @"appearCount"];
    }

}

</code>
  </pre>
</DIV>