サーバーから iPad にファイルをダウンロードする同期プロセスを実行しています。iOS6 でプロセスを実行している場合、UI は次のようになります。
ただし、プロセスの実行中にアプリを閉じてホーム画面に戻り、アプリを再起動すると、次のようになります。
画面が真っ暗…
同時に、これを iOS5 で実行すると、問題なく動作します。しかし問題は、iOS6 で実行したときです。
時々、正しく実行されて赤い背景が返されます..時々、黒い画面が返されます...この問題に完全に面白がっています...
その理由は何ですか？
編集：
- (void)applicationWillResignActive:(UIApplication *)application
{
/*
Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
*/
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
/*
Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
*/
}
- (void)applicationWillEnterForeground:(UIApplication *)application
{
/*
Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
*/
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
/*
Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
*/
}
- (void)applicationWillTerminate:(UIApplication *)application
{
/*
Called when the application is about to terminate.
Save data if appropriate.
See also applicationDidEnterBackground:.
*/
}