你如何用大标题的搜索栏来圆 UINavigation 栏的底角

Question

尝试使用搜索栏和大标题创建 UINavigationBar 时，如何将导航栏底部设置为圆角？

        self.navigationController?.navigationBar.prefersLargeTitles = true              
    search.searchBar.delegate = self
            search.searchBar.sizeToFit()
            search.obscuresBackgroundDuringPresentation = false
            search.hidesNavigationBarDuringPresentation = true
            self.definesPresentationContext = true
            search.searchBar.placeholder = "Search here"
            self.navigationItem.searchController = search

Answer 1

自定义导航栏有些困难。 但是有一种简单的方法可以使用背景图像来实现它。 您可以将图像设置为导航栏。

stackoverflow 中的其他人已经提出了问题，因此请参考该答案。

访问： https ://stackoverflow.com/a/61620703/12775090

Answer 2

所以我发现这行得通，但是，现在我的搜索栏文本在紫色和白色上是黑色的？ - 我必须将视图的背景颜色设置为紫色，然后在视图顶部放置一个白色背景视图。 想法？

override func viewDidLoad() {
    super.viewDidLoad()
    
    self.navigationController?.navigationBar.prefersLargeTitles = true
    self.navigationController?.navigationBar.layer.cornerRadius = 30
    self.navigationController?.navigationBar.layer.maskedCorners = [.layerMinXMaxYCorner, .layerMaxXMaxYCorner]
    self.navigationController?.navigationBar.clipsToBounds = true
    
    let app = UINavigationBarAppearance()
    app.largeTitleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
    app.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
    app.backgroundColor = UIColor(red: 0.30, green: 0.07, blue: 0.63, alpha: 1.00)
    
    self.navigationController?.navigationBar.scrollEdgeAppearance = app
    
     self.navigationController?.navigationBar.isOpaque = true
    search.searchBar.delegate = self
    UISearchBar.appearance().tintColor = .white
    search.searchBar.searchTextField.textColor = .white
    search.searchBar.sizeToFit()
    search.obscuresBackgroundDuringPresentation = false
    search.hidesNavigationBarDuringPresentation = false
    self.definesPresentationContext = true
    search.searchBar.placeholder = "Search here"
    self.navigationItem.searchController = search
}