swift - 搜索栏取消按钮仅在 iPad 上不可见

Question

首先我想说我没有在 Swift 中找到任何好的答案。我创建了搜索栏。单击按钮时显示，取消时隐藏 searchbar。它工作正常，取消按钮在所有 iPhone 上都可见，但由于某些原因在 iPad 上不。这是什么原因造成的？

这就是我创建 searchbar 的方式:

//Create searchbar
    func createSearchBar(){

        searchBar.showsCancelButton = true
        searchBar.tintColor = UIColor(red:0.184, green:0.996, blue:0.855, alpha:1.00)
        searchBar.placeholder = "Search brands"
        searchBar.delegate = self



        searchBar.hidden =  false
        searchBar.alpha = 0

        navigationItem.titleView = searchBar
        navigationItem.setLeftBarButtonItem(menuButton, animated: true)
        navigationItem.setRightBarButtonItem(searchButtton, animated: true)


        UIView.animateWithDuration(0.5, animations: {
            self.searchBar.alpha = 1
            }, completion: { finished in
                self.searchBar.becomeFirstResponder()
        })


    }

Answer 1

面对我的同一个项目。我已经在苹果论坛上发帖，许多开发人员评论说这是一个 xcode 错误。所以我为 ipad View 手动添加了取消按钮

 func configureCancelBarButton() {
    let cancelButton = UIBarButtonItem()
    cancelButton.image = UIImage(named: "cancelButton")
    cancelButton.action = #selector(viewController.ipadCancelButton(_:))
    cancelButton.target = self
    self.navigationItem.setRightBarButtonItem(cancelButton, animated: true)
}

我之前发布了关于这个问题的答案。 Check that too . :)