Swift 将带有子视图的 UIView 添加到 titleView

Question

我想自定义我的导航栏并在导航栏的标题视图中插入一个带有两个子视图的 UIView。不幸的是，子视图没有显示。你知道为什么吗？

    let titleContainer = UIView()
    titleContainer.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height)

    let searchIcon = UIButton()
    searchIcon.setImage(UIImage(named: "search_icon"), for: UIControlState.normal)
    searchIcon.layer.frame = CGRect(x: 0, y: (UIScreen.main.bounds.size.height - 28) / 2, width: 28, height: 28)
    titleContainer.addSubview(searchIcon)

    let titleLabel = UILabel()
    titleLabel.frame = CGRect(x: 28, y: UIScreen.main.bounds.size.height, width: UIScreen.main.bounds.size.width-28, height: UIScreen.main.bounds.size.height)
    titleLabel.textColor = UIColor(red:255, green:255, blue:255, alpha:1.0)
    titleContainer.addSubview(self.titleLabel)

    self.navigationItem.titleView = titleContainer

问题和预期的解决方案：

Answer 1

您是否考虑过以编程方式制作 let bar = UINavigationBar()，然后添加：self.view.addSubview(bar)？

所以你可以推送所有你想要的 "UIBarItems"..?

Answer 2

为什么把所有元素的height当成UIScreen.main.bounds.size.height？请尝试以下代码。

P.S。我已经更改了 searchIcon 的颜色，因为我没有图像，并且更改了标签文本的颜色并添加了一些文本以使其可见。

    let titleContainer = UIView()
    titleContainer.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: 45)

    let searchIcon = UIButton()
    //searchIcon.setImage(UIImage(named: "search_icon"), for: UIControlState.normal)
    searchIcon.backgroundColor = UIColor.red
    searchIcon.layer.frame = CGRect(x: 0, y: 8, width: 28, height: 28)
    titleContainer.addSubview(searchIcon)

    let titleLabel = UILabel()
    titleLabel.frame = CGRect(x: 28, y: 8, width: UIScreen.main.bounds.size.width-28, height: 30)
    titleLabel.textColor = UIColor.blue//(red:255, green:255, blue:255, alpha:1.0)
    titleContainer.addSubview(titleLabel)
    titleLabel.text = "Sample Text"

    self.navigationItem.titleView = titleContainer

以上代码截图如下：

请根据您的要求相应地更改 x,y。

Swift 将带有子视图的 UIView 添加到 titleView

Swift Add UIView with subviews to titleView

subview

uiview

titleview

ios

swift