我正在尝试向我的导航控制器添加一个自定义后退按钮,但它无法正常工作。
func setupNavBarItems() {
self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.isTranslucent = true
self.navigationController?.view.backgroundColor = UIColor.clear
let backButton = UIButton(type: .system)
backButton.setImage(#imageLiteral(resourceName: "icon_back"), for: .normal)
navigationItem.leftBarButtonItem = UIBarButtonItem(customView: backButton)
}
而且我也尝试过,但没有任何运气(我用以下代码替换了底部 2 行)
let backButton = UIButton(type: .system)
backButton.setImage(#imageLiteral(resourceName: "icon_back"), for: .normal)
let backBarButton = UIBarButtonItem.init(customView: backButton)
navigationItem.setLeftBarButton(backBarButton, animated: true)
我看到自定义按钮图像,但它不会触发后退按钮动作。
在这种情况下,最好将其声明为实例变量,因为目标与局部变量一起丢失/lazy
除了目标popViewController
let addButton = UIBarButtonItem(image:UIImage(named:"your_icon_name"), style:.plain, target:self, action:#selector(YourControllerName.buttonAction(_:)))
addButton.tintColor = UIColor.white
self.navigationItem.leftBarButtonItem = addButton
.....
@objc func buttonAction(_ sender: UIBarButtonItem) {
self.navigationController?.popViewController(animated: true)
}
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