title: how to display the zoom-in view in the standard mode of the large-screen phone
body: <p>Recently I was asked to adapt to large-screen phones because the standard mode view looks too small on large-screen phones. So I thought of a simple way: display the zoom-in view in the standard mode of the large-screen phone. But i can't find a good way to realize it.
  The original idea was to set the currentMode setting of UIScreen, but iOS does not support the creation of external UIScreenMode...</p>