Space UIBarButtonItem 问题

Question

我正在尝试使用以下代码将 Cancel UIBarButtonItem 添加到我的导航栏：

func setupNavBar() {
    self.navBar = UINavigationBar(frame: CGRectMake(0.0, 0.0, UIScreen.mainScreen().bounds.width, 64.0))

    let customNavigationItem = UINavigationItem(title: "Connect Accounts")
    let cancelButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Cancel, target: self, action: "cancelClicked")
    customNavigationItem.setLeftBarButtonItem(cancelButton, animated: true)

    self.navBar.setItems([customNavigationItem], animated: true)

    self.view.addSubview(self.navBar)
}

条形按钮完全贴在屏幕边缘，如下所示：

为什么这个按钮看起来粘在屏幕边缘，我怎样才能给它留出间距，这样它就不会粘在那里？请帮忙！

编辑：我的按钮粘在屏幕的左边缘而不是左上角。

Answer 1

试试这个

let btn = UIButton(frame: CGRectMake(<your margin>, 0, 50, 44))
        btn.setTitle("Cancel", forState: UIControlStateNormal)

       let btnbarButton = UIBarButtonItem(customView: btn)
        customNavigationItem.setLeftBarButtonItem(btnbarButton, animated: true)

Answer 2

试试吧。

override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        self.setupNavBar()
    }
    func setupNavBar() {

        let navBar = UINavigationBar(frame: CGRectMake(0.0, 0.0, UIScreen.mainScreen().bounds.width, 64.0))
    let customNavigationItem = UINavigationItem(title: "Connect Accounts")
    let cancelButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Cancel, target: self, action: "cancelClicked:")
    let fixedSpace = UIBarButtonItem(barButtonSystemItem: .FixedSpace, target: nil, action: nil)
    fixedSpace.width = 10
    customNavigationItem.leftBarButtonItems = [fixedSpace, cancelButton]

    navBar.setItems([customNavigationItem], animated: true)

    self.view.addSubview(navBar)
    }

    func cancelClicked(sender: AnyObject){
        print("Good luck!")
    }

Answer 3

添加 space 的正确方法是使用 .FixedSpace :

let fixedSpace = UIBarButtonItem(barButtonSystemItem: .FixedSpace, target: nil, action: nil)
fixedSpace.width = 10
customNavigationItem.leftBarButtonItems = [fixedSpace, cancelButton]

UIBarButtonSystemItemFixedSpace

Blank space to add between other items. Only the width property is used when this value is set.

Available in iOS 2.0 and later.

Space UIBarButtonItem 问题

Space issue with UIBarButtonItem

iphone

uinavigationbar

uibarbuttonitem

ios

swift