如何在ios设备中安装应用程序后显示警报 [英] How to show alert once after installing the app in ios device

问题描述

如何在设备或模拟器上安装应用程序后，在应用程序启动时仅显示一次警报，直到我从设备中删除它为止。有可能告诉我..

How to show an alert only once at the start of an application after installing the application on device or on simulator until I delete it from my device. Is it possible tell me..

推荐答案

你可以这样做：

if (![[NSUserDefaults standardUserDefaults] boolForKey:@"HasLaunchedOnce"]) {
   //first launch
   //show your alert
   [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"HasLaunchedOnce"];
   [[NSUserDefaults standardUserDefaults] synchronize];
}
else
{
    // app already launched
}

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