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基本上，我在 TableViewController 中有以下代码，除了一些额外的行之外，它基本上在另一个 CollectionViewController 中重复：

  func configureSearchController() {
    searchController.obscuresBackgroundDuringPresentation = false
    searchController.searchBar.placeholder = "Search Albums"
    navigationItem.searchController = searchController
    navigationItem.hidesSearchBarWhenScrolling = false
    definesPresentationContext = true
    searchController.searchBar.delegate = self
  }

为了清理我的两个控制器中的代码，我想将这些方法移动到一个新文件中，如下所示：

class SearchBarManager: UIViewController {

func configureAlbumSearchController(_ searchController: UISearchController, _ navigationItem: UINavigationItem) {
    searchController.obscuresBackgroundDuringPresentation = false
    searchController.searchBar.placeholder = "Search Albums"
    navigationItem.searchController = searchController
    navigationItem.hidesSearchBarWhenScrolling = false
    definesPresentationContext = true
}

func configurePhotoSearchController(_ searchController: UISearchController, _ navigationItem: UINavigationItem) {
    searchController.obscuresBackgroundDuringPresentation = false
    searchController.searchBar.placeholder = "Search Photos"
    navigationItem.searchController = searchController
    navigationItem.hidesSearchBarWhenScrolling = false
    definesPresentationContext = true
    searchController.searchBar.scopeButtonTitles = ["1 Column", "2 Columns", "3 Columns"]
    searchController.searchBar.selectedScopeButtonIndex = 2
}}

这是正确的方法吗？我觉得有一种更简单的方法可以简化我想要完成的工作，但我不确定。提前致谢！

4

1 回答 1

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保持你的代码干净很重要，它可以让你重用代码。为了实现这一点，您可以使用一些常见的设计模式，如策略，您可以使用面向协议的编程。

我将留下一些资料，以便您可以更深入地了解如何使用 SOLID 原则来实现这一目标：https ://medium.com/ios-expert-series-or-interview-series/solid-design-principle-using-swift- 34bb1731cfb3

在这种情况下，您需要一个简单的抽象，您需要创建一个能够配置任何 SearchController 的函数。我会给你一个例子，但不要让这个例子限制你，还有很多其他（和更好的方法）可以实现这一点。

 class SearchBarManager: UIViewController {

private func configureSearchController(searchController: UISearchController, navigationItem: UINavigationItem, title: String, scopeButtonTitles: [String] = [], selectedScopeButtonIndex: Int = 0) {
    searchController.obscuresBackgroundDuringPresentation = false
    searchController.searchBar.placeholder = title
    navigationItem.searchController = searchController
    navigationItem.hidesSearchBarWhenScrolling = false
    definesPresentationContext = true
    searchController.searchBar.scopeButtonTitles = scopeButtonTitles
    searchController.searchBar.selectedScopeButtonIndex = selectedScopeButtonIndex
}


func configureAlbumSearchController(_ searchController: UISearchController, _ navigationItem: UINavigationItem) {
    configureSearchController(searchController: searchController, navigationItem: navigationItem, title: "Search Albums")
}

func configurePhotoSearchController(_ searchController: UISearchController, _ navigationItem: UINavigationItem) {
    configureSearchController(searchController: searchController, navigationItem: navigationItem, title: "Search Photos", scopeButtonTitles: ["1 Column", "2 Columns", "3 Columns"], selectedScopeButtonIndex: 2)
}

}
于 2021-01-22T15:53:30.263 回答