以编程方式构建工具栏

Question

我正在学习如何使用Swift，并且我意识到我无法将工具栏直接添加到带有UITableViewController的故事板中，所以我很难尝试以编程方式添加它。

这就是我想让它看起来像：

现在，我添加了这段代码：

    let homeButton = UIBarButtonItem(title: "H", style: .plain, target: self, action: #selector(ProfileButtonTapped))

    let addButton = UIBarButtonItem(title: "+", style: .plain, target: self, action: #selector(ProfileButtonTapped))

let loveButton = UIBarButtonItem(title: "Love", style: .plain, target: self, action: #selector(ProfileButtonTapped))

let arr: [Any] = [homeButton, addButton, loveButton]
setToolbarItems(arr as? [UIBarButtonItem] ?? [UIBarButtonItem](), animated: true)
super.viewDidAppear(animated)

它看起来像这样：

但是我找不到一种方法让它看起来与原版的间距相同，而且如果我设置图像，我找不到根据需要调整尺寸的方法。

我尝试使用此处找到的代码并且似乎有效，但是当我加载我的应用时，它只显示没有任何元素的条形码。

navigationController?.setToolbarHidden(false, animated: true)

let homeButn = UIImage(named: "HomeButton")

let zeroPoint = CGPoint.zero
let settingsButton = UIButton(type: UIButtonType.custom) as UIButton
settingsButton.frame = CGRect(origin: zeroPoint, size: CGSize(width: 27, height: 27))
settingsButton.setImage(homeButn, for: [])
settingsButton.addTarget(self, action: #selector(ProfileButtonTapped), for: UIControlEvents.touchUpInside)

let rightBarButtonItem = UIBarButtonItem(customView: settingsButton)
navigationItem.setRightBarButton(rightBarButtonItem, animated: true)

我真的不知道如何做到这一点，任何想法？非常感谢！

Answer 1

如果有帮助的话，试试这个：

let flexibleSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: self, action: nil)

let homeButton = UIBarButtonItem(title: "H", style: .plain, target: self, action: #selector(ProfileButtonTapped))

let flexibleSpace1 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: self, action: nil)

let addButton = UIBarButtonItem(title: "+", style: .plain, target: self, action: #selector(ProfileButtonTapped))

let flexibleSpace2 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: self, action: nil)

let loveButton = UIBarButtonItem(title: "Love", style: .plain, target: self, action: #selector(ProfileButtonTapped))

let arr: [Any] = [flexibleSpace, homeButton, flexibleSpace1, addButton, flexibleSpace2, loveButton]

setToolbarItems(arr as? [UIBarButtonItem] ?? [UIBarButtonItem](), animated: true)

super.viewDidAppear(animated)

您也可以在“H”的左侧添加灵活空间以获得左侧空间。