UIView宽度在首次启动时显示不同

Question

我有一个具有以下属性的UIView。 SearchController以编程方式在此视图中添加。但是，GIF中出现问题。

@IBOutlet weak var searchView: UIView!
 let searchController = UISearchController(searchResultsController: nil)
    override func viewDidLoad() {
        super.viewDidLoad()
        // Setup the Search Controller
        searchController.searchResultsUpdater = self
        searchController.dimsBackgroundDuringPresentation = false
        definesPresentationContext = true
        searchView.addSubview(searchController.searchBar)

Answer 1

searchView.addSubview(searchController.searchBar)
searchController.searchBar.sizeToFit()

Answer 2

将添加搜索条形码移至

  

viewDidAppear

如果在viewDidLoad中启用了自动布局

，您的视图将无法获得正确的设备帧