iOS真机模拟内存警告

开关宏

#ifndef __OPTIMIZE__
#define OPEN_MEMORY_WARNING_TEST YES //打开内存警告测试开关
#endif

调用私有API

- (void)simulateMemoryWarning
{
    if (OPEN_MEMORY_WARNING_TEST == NO) {
        return;
    }
    [[UIApplication sharedApplication] _performMemoryWarning];
}

在需要的地方调用

[[MemoryWarningTest sharedInstance] simulateMemoryWarning];