可以从代码中模拟内存警告吗？

Question

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.我甚至可以为此做一个热门钥匙.

但这不是我想要实现的目标.我想通过简单的代码来做到这一点,让我们说每5秒做一次.那可能吗？

Answer 1

实际上它很简单,但是它依赖于一个未记录的api调用,所以不要随它发送你的应用程序(即使它在一个无法访问的代码路径中).你所要做的就是:[[UIApplication sharedApplication] _performMemoryWarning];

此方法将使App的UIApplication对象发布UIApplicationDidReceiveMemoryWarningNotification,并在App Delegate和所有UIViewController上调用applicationDidReceiveMEmoryWarning:方法

-(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

我写了一个苹果脚本,它会使模拟器出现内存错误,这有点极端,但如果你的代码存活下来,那么你可以更自信......

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