内存警告后强制卸载活动模态视图

发布于 2024-10-19 03:03:59 字数 480 浏览 0 评论 0原文

我在卸载视图时遇到问题，该视图当前处于活动状态并使用以下代码以模态方式显示：

UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:myContentController];

[navController setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];

[self presentModalViewController:navController animated:YES];

出现内存警告后，该控制器通过 unloadViewForced: 方法卸载其视图。这会导致向用户显示黑屏。

有谁知道 unloadViewIfReloadable 使用什么标准来确定视图处于活动状态？在内存警告后，我可以在模态视图显示期间进行哪些设置来保护它。

原文

I have a problem with a view being unloaded which is currenlty active and displayed modally using the following code:

UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:myContentController];

[navController setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];

[self presentModalViewController:navController animated:YES];

After a memory warning this controller has its view unloaded via the unloadViewForced: method. This results in a black screen being displayed to the user.

Does anyone know what criteria unloadViewIfReloadable uses to determine that the view is active? What setup during the display of the modal view can I do to protect it after a memory warning.

分享到QQ

分享到微博