iOS 导航栏自定义 titleView 子视图未正确显示

Question

iOS navigation bar custom titleView subviews are not showing properly when the parent viewController pushed from another view controller.

Custom Title view in root view

Custom Title view in View controller after pushing from the different view controller

Code I tried for Custom TitleView

   let height = CGFloat(500)
    self.navigationController?.navigationBar.frame = CGRect(x: 0, y: 50, width: view.frame.width, height: height)
    self.navigationController?.navigationBar.backgroundColor = .blue
    let navView = UIImageView()
    navView.frame = CGRect(x: 0, y: 0, width: view.frame.width-100, height: height)
    navView.backgroundColor = .red
    navigationItem.titleView = navView

Suview

        let oneLabel = UILabel()
        oneLabel.frame = CGRect(x: 50, y: navView.frame.size.height-13, width: 26, height: 26)
        oneLabel.text = "1"
        oneLabel.textColor = .white
        oneLabel.backgroundColor = UIColor(hexString: Constants.greenColor)
        oneLabel.textAlignment = .center
        navView.addSubview(oneLabel)

        oneLabel.clipsToBounds = true
        oneLabel.layer.cornerRadius = 13

Answer 1

标签的总高度是 26，你只从 imageview 的高度减少了 13，它显示了标签的一半.. 使标签的 y 值类似于 y: navView.frame.size.height - 30