Simulate memory warnings from the code, possible? [duplicate]

Question

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.

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?

Answer 1

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 use [[UIApplication sharedApplication] _performMemoryWarning];.

This method will have the app's UIApplication object post the UIApplicationDidReceiveMemoryWarningNotification and call the applicationDidReceiveMemoryWarning: method on the App Delegate and all UIViewControllers.

-(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 } 

Answer 2

I wrote an apple script that will hammer the simulator with memory errors, it is a bit extreme but if your code survives, then you can be more confident...

on run repeat 100 times     tell application "System Events"         tell process "iOS Simulator"             tell menu bar 1                 tell menu bar item "Hardware"                     tell menu "Hardware"                         click menu item "Simulate Memory Warning"                     end tell                 end tell             end tell         end tell     end tell     delay 0.5 end repeat end run