相关疑难解决方法(0)

我怎样才能检测到第一次发布

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  // if very first launch than perform actionA
  // else perform actionB
}

方法？

我试图在Swift中找到一种方法来检测第一次发射.