uni-datetime-picker 横屏适配

uni-datetime-picker组件在设备横屏时由于组件高度过高导致选择顶部月份切换看不到了


Start by locating the uni-datetime-picker component and reproducing the reported layout on a device in landscape orientation, using the attached screenshot as the reference. The issue names no file or test, so inspect the component's existing layout behavior and define done as keeping the month navigation visible in landscape without breaking portrait mode.

Written by the indexing model from the issue text.