ios - 导航标题自定义 View 操作未触发

Question

我正在尝试向要添加到导航 titleView 的 View 添加操作

let titleview = UIView()
        titleview.isUserInteractionEnabled = true
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(VC.openPopup))
        titleview.addGestureRecognizer(tapGesture)
        let label = UILabel()
        label.textColor = UIColor.white
        label.font = UIFont.systemFont(ofSize: 12)
        label.text = "Tap Here to change"
        titleview.addSubview(self.selectGroupButton)
        titleview.addSubview(label)

我将此 View 添加为导航标题 View

self.navigationItem.titleView = self.selectGroupView
self.navigationItem.titleView?.isUserInteractionEnabled = true

但是我的方法没有被调用。

Answer 1

在你的代码中我可以看到几个问题，

1. 没有为标签设置框架。
2. 不确定您是否为按钮设置了选择器

请看下面的代码改动

let titleview = UIView()
        titleview.frame = CGRect(x: 0, y: 0, width: 200, height: 40)
        titleview.isUserInteractionEnabled = true
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(your class.openPopup))
        titleview.addGestureRecognizer(tapGesture)
        let label = UILabel()
        label.frame = CGRect(x: 0, y: 0, width: 200, height: 20)
        label.textColor = UIColor.red
        label.font = UIFont.systemFont(ofSize: 12)
        label.text = "Tap Here to change"

        let selectGroupButton: UIButton = UIButton(frame: CGRect(x:0, y:20, width:200, height:20))
        selectGroupButton.setTitle("tt", for: UIControlState.normal)
        selectGroupButton.setTitleColor(UIColor.red, for: UIControlState.normal)
        selectGroupButton.addTarget(self, action: #selector(yourclass.methodcall), for: UIControlEvents.touchUpInside)

        titleview.addSubview(selectGroupButton)
        titleview.addSubview(label)

        self.navigationItem.titleView = titleview
        self.navigationItem.titleView?.isUserInteractionEnabled = true