Question

我正在尝试在应用程序的导航中添加自定义UIBarButtonItem。通过以下代码，我设法添加了一个

let rightButton = UIButton(type: .custom)
    rightButton.frame = CGRect(x: 0, y: 0, width: 10, height: 10)
    rightButton.setImage(UIImage(named: "hamburgerMenuIcon"), for: .normal)
    navigationItem.rightBarButtonItem = UIBarButtonItem(customView: rightButton)                  target: nil, action: nil)

但是看起来rightButton.frame不能正常工作，因为它根本不会改变按钮的尺寸。

Answer 1

在iOS 11中，导航栏带有“自动布局”功能，因此框架设置可能不起作用。使用以下代码

let rightButton = UIButton(type: .custom)
rightButton.frame = CGRect(x: 0.0, y: 0.0, width: 10, height: 10)
rightButton.setImage(UIImage(named:"hamburgerMenuIcon"), for: .normal)

let menuBarItem = UIBarButtonItem(customView: rightButton)
let currWidth = menuBarItem.customView?.widthAnchor.constraint(equalToConstant: 10)
currWidth?.isActive = true
let currHeight = menuBarItem.customView?.heightAnchor.constraint(equalToConstant: 10)
currHeight?.isActive = true
navigationItem.rightBarButtonItem = menuBarItem

在导航控制器中调整自定义UIBarButtonItem的大小

1 个答案: