从代码中模拟内存警告，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 Simulator的下拉菜单中选择"Simulate Memory Warning"来在模拟器上模拟内存警告.我什至可以为此设置一个热键.

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.我想通过代码简单地做到这一点，可以说每5秒钟执行一次.有可能吗?

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

实际上很简单，但是它依赖于未公开的api调用，因此请不要随其附带您的应用程序(即使它位于无法访问的代码路径中) .您所要做的就是:[[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];

此方法将让App的UIApplication对象发布UIApplicationDidReceiveMemoryWarningNotification并调用App Delegate上的applicationDidReceiveMEmoryWarning:方法和所有UIViewController的

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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