ios - 打开应用程序 3 次后显示 uialertview？

Question

是否可以在假设 3 次后打开应用程序时显示 Alertview？这可以用 NSUserDefaults 完成吗？

谢谢!

Answer 1

int launches = [[NSUserDefaults standardUserDefaults] integerForKey:@"launchCount"];
if (launches > 3) {
  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"My Alert" 
                                                  message:@"Some message" delegate:nil
                                        cancelButtonTitle:@"OK" otherButtonTitles:nil];
  [alert show];
}
[[NSUserDefaults standardUserDefaults] setInteger:launches+1 forKey:@"launchCount"];