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XiongFangyu edited this page Nov 25, 2020 · 6 revisions

简介

返回该视图的父视图对象

父视图,当前视图必须有父视图才会返回非nil值,且window返回nil

  • @return 父视图,当前视图必须有父视图才会返回非nil值,且window返回nil
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