ios - UISearchBar 和导航 Controller 中的两个按钮

Question

我正在尝试向我的导航 Controller 添加两个按钮和一个 SearchBar，但对齐方式不正确。我几乎尝试了所有方法，例如更改 SearchBar、UIButton 的大小或更改 Y 定位，但都没有用。知道如何解决这个问题吗？ 我正在使用 iOS 11 和 Xcode 9

    searchController = UISearchController(searchResultsController: nil)
    searchController?.searchBar.frame = CGRect(x: 0, y: 0, width: 200, height: 30)
    searchController?.delegate = self
    searchController?.searchResultsUpdater = self

    let refineButton = UIButton.init(type: UIButtonType.custom)
    refineButton.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
    refineButton.setImage(#imageLiteral(resourceName: "settings-button"), for: UIControlState.normal)
    refineButton.widthAnchor.constraint(equalToConstant: 30).isActive = true
    refineButton.heightAnchor.constraint(equalToConstant: 30).isActive = true


    let refineItem = UIBarButtonItem(customView: refineButton)


    navigationItem.leftBarButtonItem = refineItem
    navigationItem.titleView = searchController?.searchBar
    searchController?.searchBar.sizeToFit()

Answer 1

请检查:

override func viewWillLayoutSubviews() {
    searchController?.searchBar.frame = CGRect(x: 0, y: 0, width: 300, height: 30)
    searchController?.searchBar.sizeToFit()
}