如何在iOS中调整后退按钮的y轴

Question

我创建了一个自定义导航控制器子类UINavigationController 。 现在，当我增加导航栏的大小时，后退按钮也会向下滑动。 Then how to adjust the y-axis of back button.

self.navigationBar.frame = CGRect(x:0, y: 20, width: self.view.frame.size.width, height: 64.0)

我可以通过下面的代码调整标题的y轴

self.navigationBar.setTitleVerticalPositionAdjustment(-30, for: .default)

Answer 1

尝试 - （void）setBackButtonTitlePositionAdjustment :( UIOffset）调整BarMetrics：（UIBarMetrics）barMetrics; - （void）setBackButtonBackgroundVerticalPositionAdjustment：（CGFloat）调整BarMetrics：（UIBarMetrics）barMetrics;

Answer 2

这适用于Swift 3

self.navigationController?.navigationBar.frame = CGRect(x: 0, y: 20, width: self.view.bounds.size.width, height: 100)
    self.navigationController?.navigationBar.barTintColor = UIColor.yellow
    self.title = "My Title"
    self.navigationController?.navigationBar.setTitleVerticalPositionAdjustment(-30, for: .default)
    let button = UIBarButtonItem(title: "myButton", style: .done, target: self, action: #selector(myViewController.myFunc))
    self.navigationItem.leftBarButtonItem = button
    self.navigationItem.leftBarButtonItem?.setTitlePositionAdjustment(.init(horizontal: 0, vertical: -30), for: .default)