从代码模拟内存警告，可能吗? [英] Simulate memory warnings from the code, possible?

问题描述

我知道我可以通过从 iPhone 模拟器的下拉菜单中选择模拟内存警告"来模拟模拟器上的内存警告.我什至可以为此制作一个热键.

I know i can simulate a memory warning on the simulator by selecting 'Simulate Memory Warning' from the drop down menu of the iPhone Simulator. I can even make a hot key for that.

但这不是我想要实现的.我想从代码中简单地做到这一点，假设每 5 秒执行一次.这可能吗?

But this is not what I'd like to achieve. I'd like to do that from the code by simply, lets say doing it every 5 seconds. Is that possible?

推荐答案

实际上很容易，但是它依赖于未记录的 api 调用，所以不要随它一起发布您的应用程序(即使它位于无法访问的代码路径中).你所要做的就是:[[UIApplication sharedApplication] _performMemoryWarning];

It is pretty easy actually, however it relies on an undocumented api call, so dont ship your app with it (even if it is in a inaccessible code path). All you have to do is: [[UIApplication sharedApplication] _performMemoryWarning];

此方法将使应用程序的 UIApplication 对象发布 UIApplicationDidReceiveMemoryWarningNotification 并调用应用程序委托和所有 UIViewController 上的 applicationDidReceiveMEmoryWarning: 方法

This method will have the App's UIApplication object post the UIApplicationDidReceiveMemoryWarningNotification and call the applicationDidReceiveMEmoryWarning: method on the App Delegate and all UIViewController's

-(IBAction) performFakeMemoryWarning {
  #ifdef DEBUG_BUILD
    SEL memoryWarningSel = @selector(_performMemoryWarning);
    if ([[UIApplication sharedApplication] respondsToSelector:memoryWarningSel]) {
      [[UIApplication sharedApplication] performSelector:memoryWarningSel];
    }else {
      NSLog(@"Whoops UIApplication no loger responds to -_performMemoryWarning");
    }
  #else
    NSLog(@"Warning: performFakeMemoryWarning called on a non debug build");
  #endif
}

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