The purpose of the LGSemiModalNavController is to allow you to show a view controller a dynamically set height over another view controller.

The effect this custom transition gives off is that a view partially springs up from the bottom of the screen and into place. The view that gets sprung over, gets scaled down by a customizable amount.

lgsemimodalnavcontroller的目的是允許你顯示一個視圖控制器動態(tài)設(shè)置高度在另一個視圖控制器。
這個自定義轉(zhuǎn)換的效果是，一個視圖部分從屏幕底部彈出并進(jìn)入。被激活的視圖會被可定制的數(shù)量縮小。