IOS - Swift - 向 BarButtonItem 的 customView 添加目标和操作答案

【问题标题】：IOS - Swift - adding target and action to BarButtonItem's customViewIOS - Swift - 向 BarButtonItem 的 customView 添加目标和操作
【发布时间】：2014-11-06 08:18:57
【问题描述】：

我正在创建一个自定义视图，其中一个 uiimageview 作为子视图。然后，我在导航栏中使用该自定义视图作为 rightBarButtonItem。这可以在正确的位置显示正确的图标，但无论出于何种原因，我在“action”中定义的函数永远不会被调用，所以当我点击 rightBarButtonItem 时不会执行 segue。奇怪的是，如果我不插入自定义视图，而是将其注释掉并为 rightItem 设置标题、目标和操作，那么该功能就会正确执行。以某种方式添加自定义视图与目标和操作属性混淆，但我似乎无法弄清楚如何修复它。任何帮助将不胜感激！

//create custom view for right item and set it
    var imageViewRight:UIImageView = UIImageView()
    imageViewRight.frame = CGRectMake(5, 10, 35, 25)
    let rightImage:UIImage = UIImage(named: "cameraIconInactive")!
    imageViewRight.image = rightImage
    var rightView:UIView = UIView()
    rightView.frame = CGRectMake(0, 0, 45, 45)
    rightView.addSubview(imageViewRight)
    var rightItem:UIBarButtonItem = UIBarButtonItem()
   //this line right below is the problem - if I comment it out and replace with a simple rightItem.title = "test" and leave everything else the same, then the method runs properly
    rightItem.customView = rightView
    rightItem.target = self
    rightItem.action = "pushProfileToCamera"
    self.navigationItem.rightBarButtonItem = rightItem

}

func pushProfileToCamera(){
    println("pushing profile to camera")
    self.performSegueWithIdentifier("pushProfileToCamera", sender: nil)
}

编辑：

在我看到这些答案建议之前，我实际上坐了 24 小时并想出了这个解决方案。有什么理由我不应该这样做？它的工作原理..

//create the custom rightBarButtonItem
    //create the imageView with icon
    var imageViewRight:UIImageView = UIImageView()
    imageViewRight.frame = CGRectMake(5, 10, 35, 25)
    var rightImage:UIImage = UIImage(named: "cameraIconInactive")!
    imageViewRight.image = rightImage
    //put the imageView inside a uiview
    var rightView:UIView = UIView()
    rightView.frame = CGRectMake(0, 0, 45, 45)
    rightView.addSubview(imageViewRight)
    //create the tap gesture recognizer for that uiview
    var rightGestureRecognizer:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "pushProfileToCamera")
    rightView.addGestureRecognizer(rightGestureRecognizer)
    //create the uibarbuttonitem, assign our custom view to it, and insert it in the nav bar!
    var rightItem:UIBarButtonItem = UIBarButtonItem()
    rightItem.customView = rightView
    self.navigationItem.rightBarButtonItem = rightItem

【问题讨论】：

标签： ios iphone uinavigationbar uinavigationitem

【解决方案1】：

您可以尝试将 UIButton 添加到 rightBarButtonItem，而不是链接 rightItemAction 并将 UIView 添加到 customView：

    var button: UIButton = UIButton()
    button.setImage(UIImage(named: "cameraIconInactive"), forState: .Normal)
    button.frame = CGRectMake(0, 0, 45, 45)
    button.targetForAction("pushProfileToCamera", withSender: nil)

    var rightItem:UIBarButtonItem = UIBarButtonItem()
    rightItem.customView = button
    self.navigationItem.rightBarButtonItem = rightItem

【讨论】：

【解决方案2】：

这样试试

var rightItem:UIBarButtonItem = UIBarButtonItem(image: rightImage, landscapeImagePhone: rightImage, style: UIBarButtonItemStyle.Plain, target: self, action: "pushProfileToCamera")

【讨论】：

【解决方案3】：

self.navigationController?.navigationBarHidden =  false

    let navigationBar = UINavigationBar(frame: CGRectMake(0, 0, self.view.frame.size.width, 64)) // Offset by 20 pixels vertically to take the status bar into account

    navigationBar.backgroundColor = UIColor.blueColor()
    navigationBar.delegate = self;

    // Create a navigation item with a title
    let navigationItem = UINavigationItem()

    //menu button
    let menubutton: UIButton = UIButton(frame: CGRectMake(0, 0, 30, 30))
    menubutton.setImage(UIImage(named: "menu"), forState: UIControlState.Normal)
    menubutton.addTarget(self, action: "btn_clicked", forControlEvents: UIControlEvents.TouchUpInside)

    //menu button custom view
    let leftView = UIView(frame: CGRectMake(0,0,30,30))
    leftView.addSubview(menubutton)

    //left uibarbutton
    let leftItem:UIBarButtonItem = UIBarButtonItem(customView: leftView)
    navigationItem.leftBarButtonItem = leftItem


    //searchButton
    let searchbutton: UIButton = UIButton()
    searchbutton.setImage(UIImage(named: "search1x"), forState: UIControlState.Normal)
    searchbutton.frame = CGRectMake(0, 0, 30, 30)
    searchbutton.addTarget(self, action: "btn_clicked", forControlEvents: UIControlEvents.TouchUpInside)


    //menu button custom view
    let rightView = UIView(frame: CGRectMake(0,0,30,30))
    rightView.addSubview(searchbutton)

    //right uibarbutton
    let rightItem:UIBarButtonItem = UIBarButtonItem(customView: rightView)
    navigationItem.rightBarButtonItem = rightItem

    // Assign the navigation item to the navigation bar
    navigationBar.items = [navigationItem]

    // Make the navigation bar a subview of the current view controller
    self.view.addSubview(navigationBar)

【讨论】：

【解决方案4】：

UIBarButtonItem 已经有这个初始化器init(image: UIImage?, style: UIBarButtonItemStyle, target: AnyObject?, action: Selector)

【讨论】：

【解决方案5】：

简单快捷的方法

private lazy var profileInfoView: ProfileInfoView = {
   let view = ProfileInfoView()
   let tapGesture = UITapGestureRecognizer.init(target: self, action: #selector(didTapProfileButton))
   view.addGestureRecognizer(tapGesture)
   return view
}()

override func viewDidLoad() {
   super.viewDidLoad()
   self.navigationItem.leftBarButtonItems = [UIBarButtonItem(customView: profileInfoView)]
}

@objc private func didTapProfileButton() {
    // do your actions
}

【讨论】：