处理内存警告的总结

http://www.devdiv.com/thread-59956-1-1.html

有三种方法可以实现内存警告:

1.模拟器菜单：Hardware－》Simulate Memory Warning

2.用程序的方法实现，只需要一句代码：

CFNotificationCenterPostNotification(CFNotificationCenterGetDarwinNotifyCenter(), (CFStringRef)@"UISimulatedMemoryWarningNotification", NULL, NULL, true);

3.这是私有api方法：

SEL memoryWarningSel = @selector(_performMemoryWarning);
    if ([[UIApplication sharedApplication] respondsToSelector:memoryWarningSel]) {
[[UIApplication sharedApplication] performSelector:memoryWarningSel];
    }else {
NSLog(@"%@",@"Whoops UIApplication no loger responds to -_performMemoryWarning");
    }