不添加 UISearchController

Question

我正在尝试以编程方式将 UISearchController 添加到 UICollectionViewController。

但是没用。怎么了？ 不会出现在模拟器上

class PicturesCollectionViewController: UICollectionViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()

        setupSearchBar()
    }
    
    private func setupSearchBar() {
        let searchController = UISearchController(searchResultsController: nil)
        navigationItem.searchController = searchController
    }

    // ... numberOfItemsInSection && cellForItemAt indexPath 
}

Answer 1

事实是我在模拟器上测试，没有考虑

navigationItem.hidesSearchBarWhenScrolling = false