您可以通过以下方式添加其他偏移:
if #available(iOS 11.0, *) {
let navigationBarAppearance = UINavigationBar.appearance()
let style = NSMutableParagraphStyle()
style.alignment = .justified
style.firstLineHeadIndent = 18
navigationBarAppearance.largeTitleTextAttributes = [NSAttributedStringKey.paragraphStyle: style]
}
我刚刚在最新版本的iOS 12中发现,如果你只是修改layoutMargins
的UINavigationBar
属性,这将影响大标题。
let navigationBar = navigationController.navigationBar
navigationBar.layoutMargins.left = 36
navigationBar.layoutMargins.right = 36
我尝试了这里提到的关于使用自定义NSMutableParagraphStyle
的解决方案。这确实有效,但因为它延伸了UILabel
视图,即大标题是由你向下滑动,它在文本增长时所播放的微妙动画变得非常扭曲。
你不能。您需要编写自己的NavigationController,为此继承UINavigationController。
你必须继承UINavigationBar,然后覆盖draw方法,并在里面进行更改。看看我的工作示例,然后根据需要调整偏移/样式:
override func draw(_ rect: CGRect) {
super.draw(rect)
self.backgroundColor = UIColor.white
let largeView = "_UINavigationBarLargeTitleView"
let labelcolor = UIColor(red: 36.0/255.0, green: 38.0/255.0, blue: 47.0/255.0, alpha: 1.0)
for view in self.subviews {
if largeView.contains(String(describing: type(of: view))) {
for v in view.subviews {
if String(describing: type(of: v)) == "UILabel" {
var titleLabel = v as! UILabel
var labelRect = titleLabel.frame
let labelInsets = UIEdgeInsets(top: 10, left: 13, bottom: 0, right: 0)
let attrText = NSMutableAttributedString(string: "Jobs", attributes: [NSAttributedStringKey.font: UIFont(name: "SFProDisplay-Heavy", size: 30)!, NSAttributedStringKey.foregroundColor: labelcolor])
labelRect.origin.y += 20
let newLabel = UILabel(frame: labelRect)
newLabel.attributedText = attrText
titleLabel.text = ""
if labelRect.origin.y > 0 {
titleLabel = newLabel
titleLabel.drawText(in: UIEdgeInsetsInsetRect(labelRect, labelInsets))
}
}
}
}
}
}