iOS导航栏偏移20像素问题处理

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问题描述

开发过程中遇到一个问题，push到新页面之后，导航栏向下偏移了20像素，遮盖了view的内容，网上搜索了解决方案，如下所示，

override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        navigationController?.navigationBar.isTranslucent = true
        edgesForExtendedLayout = []
        automaticallyAdjustsScrollViewInsets = false
        extendedLayoutIncludesOpaqueBars = false
    }