swift - UINavigationBar 中的 searchBar isHidden 后获取标题

Question

我有一个 searchBar，当按下 searchButton 时，它会显示在 UINavigationBar 中。搜索完成或用户取消搜索后，我希望 title 返回到 UINavigationBar 我怎样才能将其返回？

搜索栏显示如下:

@IBAction func searchButtonTapped(_ sender: Any) {

    if searchBar.isHidden == true {
        searchBar.isHidden = false
        self.navigationItem.titleView = self.searchBar
        searchActive = true
    } else if searchBar.isHidden == false {
        searchBar.isHidden = true
        searchActive = false
        //Show title again
    }
}

Answer 1

只要这样做，然后就不会弄乱 View Controller 的设置标题方法

@IBAction func searchButtonTapped(_ sender: Any) {
        if searchBar.isHidden == true {
            searchBar.isHidden = false
            self.navigationItem.titleView = self.searchBar
            searchActive = true
        } else if searchBar.isHidden == false {
            searchBar.isHidden = true
            searchActive = false
            let label = UILabel()
            label.text = "My Title"
            label.textColor = .red
            self.navigationItem.titleView = label
        }
    }