无法模拟调用 applicationDidReceiveMemoryWarning:？
以下是调用代码：
[[NSNotificationCenter defaultCenter] postNotificationName:UIApplicationDidReceiveMemoryWarningNotification
object:[UIApplication sharedApplication]];
它无法从 UIApplicationDelegate 调用 applicationDidReceiveMemoryWarning:。
有什么问题吗？
Here is the calling code:
[[NSNotificationCenter defaultCenter] postNotificationName:UIApplicationDidReceiveMemoryWarningNotification
object:[UIApplication sharedApplication]];
It can not invoke applicationDidReceiveMemoryWarning: from UIApplicationDelegate.
Anything wrong?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（3）
在模拟器中，使用菜单触发内存不足警告。
In the simulator, use the menu to trigger a low memory warning.
您无法通过发布通知来模拟内存警告。
UIApplicationDidReceiveMemoryWarningNotification在收到内存警告时由UIApplication发布，但它没有观察到它，因此不会调用您的视图当您手动发布此类通知时，控制器的didReceiveMemoryWarning:方法。正如 Rob 已经指出的那样，您可以使用“模拟内存警告”菜单项在 iOS 模拟器中模拟内存警告。
您还可以在视图控制器中观察通知，而不是实现
didReceiveMemoryWarning:，但我不建议这样做，因为当您伪造内存警告时，系统提供的视图控制器的行为可能会有所不同那样。You cannot simulate a memory warning by posting a notification. The
UIApplicationDidReceiveMemoryWarningNotificationis posted byUIApplicationwhen it receives a memory warning, but it doesn't observe it, and therefore doesn't call your view controllers'didReceiveMemoryWarning:method when you post such a notification manually.As Rob already pointed out though, you can simulate a memory warning in the iOS simulator by using the "Simulate Memory Warning" menu item.
You could also observe the notification in your view controllers, instead of implementing
didReceiveMemoryWarning:, but I wouldn't recommend that, because the behavior of system-supplied view controllers might be different when you fake a memory warning that way.应该有效的是使用
UIApplicationMemoryWarningNotification而不是UIApplicationDidReceiveMemoryWarningNotification：What should work is using
UIApplicationMemoryWarningNotificationinstead ofUIApplicationDidReceiveMemoryWarningNotification: