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我想自定义我的导航栏并将带有两个子视图的 UIView 插入到导航栏的标题视图中。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:

在此处输入图像描述

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2 回答 2

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

所以你可以推送所有你想要的“UIBarItems”..?

于 2018-04-12T11:36:22.890 回答
0

你为什么使用height所有元素 as UIScreen.main.bounds.size.height?请尝试以下代码。

PS 我已经更改了颜色,searchIcon因为我没有图像并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

下面是上面代码的截图:

在此处输入图像描述

请根据您的要求相应地更改 x,y。

于 2018-04-12T11:52:02.840 回答