Q：从vc1 present vc2， 从 vc2 present vc3，如何退出vc3和vc2
A: 在vc1执行dismiss
present、dismiss问题
Title:present、dismiss问题
Author:Lynn Cheng
Created:2019-04-30, 10:33:33
Updated:2019-04-30, 10:34:54
Full URL:http://lynncheng.github.io/2019/04/30/present、dismiss问题/
License: "CC BY-NC-SA 4.0" Keep Link & Author if Distribute.