所以我想在导航控制器的导航栏的标题下添加一个“副标题”。
到目前为止,我查找的大多数内容都希望我使用CGRect。我不知道这是什么,听起来它想让我创建一个全新的视图,而这并不是我想要做的。
我的问题是,有没有一个点方法可以轻松地添加字幕视图?
我找到的最接近的东西是发布在stack overflow上的,这里是链接:
Create a subtitle in navigationbar
很明显,去年这是有效的,但现在我得到了错误,它在我的viewDidLoad中…
我试过这个:
self.navigationController?.navigationItem.prompt =“此处的副标题”
这是唯一不会显示任何错误但仍然不能工作的东西。从字面上看,它什么也不做。至少在运行时看不到任何东西。
顺便说一句,swift是首选。谢谢!
发布于 2016-07-28 13:54:24
虽然有一个解决方案,但它有一些已知的问题
解决方案是编写如下所示的函数
func setTitle(title:String, subtitle:String) -> UIView {
let titleLabel = UILabel(frame: CGRectMake(0, -2, 0, 0))
titleLabel.backgroundColor = UIColor.clearColor()
titleLabel.textColor = UIColor.grayColor()
titleLabel.font = UIFont.boldSystemFontOfSize(17)
titleLabel.text = title
titleLabel.sizeToFit()
let subtitleLabel = UILabel(frame: CGRectMake(0, 18, 0, 0))
subtitleLabel.backgroundColor = UIColor.clearColor()
subtitleLabel.textColor = UIColor.blackColor()
subtitleLabel.font = UIFont.systemFontOfSize(12)
subtitleLabel.text = subtitle
subtitleLabel.sizeToFit()
let titleView = UIView(frame: CGRectMake(0, 0, max(titleLabel.frame.size.width, subtitleLabel.frame.size.width), 30))
titleView.addSubview(titleLabel)
titleView.addSubview(subtitleLabel)
let widthDiff = subtitleLabel.frame.size.width - titleLabel.frame.size.width
if widthDiff < 0 {
let newX = widthDiff / 2
subtitleLabel.frame.origin.x = abs(newX)
} else {
let newX = widthDiff / 2
titleLabel.frame.origin.x = newX
}
return titleView
}
将此函数用于viewDidLoad
中的自定义导航标题视图
self.navigationItem.titleView = setTitle("Title", subtitle: "SubTitle")
唯一已知的问题是,如果字幕变得非常大,就会出现错位。
最终结果
来源:https://gist.github.com/nazywamsiepawel/0166e8a71d74e96c7898
发布于 2017-02-23 03:32:23
这是我在扩展上使用堆栈视图的版本。
extension UINavigationItem {
func setTitle(title:String, subtitle:String) {
let one = UILabel()
one.text = title
one.font = UIFont.systemFont(ofSize: 17)
one.sizeToFit()
let two = UILabel()
two.text = subtitle
two.font = UIFont.systemFont(ofSize: 12)
two.textAlignment = .center
two.sizeToFit()
let stackView = UIStackView(arrangedSubviews: [one, two])
stackView.distribution = .equalCentering
stackView.axis = .vertical
stackView.alignment = .center
let width = max(one.frame.size.width, two.frame.size.width)
stackView.frame = CGRect(x: 0, y: 0, width: width, height: 35)
one.sizeToFit()
two.sizeToFit()
self.titleView = stackView
}
}
发布于 2018-10-14 19:59:57
@iosjillian的Swift 4扩展效果很好,添加了更多的扩展来尊重工具栏的外观和用户字体首选项:
import UIKit
extension UINavigationItem {
func setTitle(_ title: String, subtitle: String) {
let appearance = UINavigationBar.appearance()
let textColor = appearance.titleTextAttributes?[NSAttributedString.Key.foregroundColor] as? UIColor ?? .black
let titleLabel = UILabel()
titleLabel.text = title
titleLabel.font = .preferredFont(forTextStyle: UIFont.TextStyle.headline)
titleLabel.textColor = textColor
let subtitleLabel = UILabel()
subtitleLabel.text = subtitle
subtitleLabel.font = .preferredFont(forTextStyle: UIFont.TextStyle.subheadline)
subtitleLabel.textColor = textColor.withAlphaComponent(0.75)
let stackView = UIStackView(arrangedSubviews: [titleLabel, subtitleLabel])
stackView.distribution = .equalCentering
stackView.alignment = .center
stackView.axis = .vertical
self.titleView = stackView
}
}
https://stackoverflow.com/questions/38626004
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