我从谷歌搜索得到这段代码,但 XCode 显示错误:“在对象类型 'NSScreen *' 上找不到属性 'backingScaleFactor'”
CGFloat displayScale = 1.0f;
if ([[NSScreen mainScreen] respondsToSelector:@selector(backingScaleFactor)])
{
displayScale = [NSScreen mainScreen].backingScaleFactor;
}