如何快速向UIViewController添加左右栏按钮

问题描述

为什么我的顶部导航栏按钮没有显示在Swift中？以下是我添加的内容，我不确定为什么在运行代码时它们不会显示

class TermsAndConditionsVC: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .blue
        setBarButtons()
    }

    func setBarButtons() {
        navigationItem.leftBarButtonItem = UIBarButtonItem(title: "logout",style: .plain,target: self,action: #selector(handlelogout))
        navigationItem.rightBarButtonItem = UIBarButtonItem(title: "logout",action: #selector(handlelogout))
    }

}

解决方法

    var addPostBarItem: UIBarButtonItem
    
    if #available(iOS 13.0,*) {
        addPostBarItem = UIBarButtonItem(image: .add,style: .plain,target: self,action: #selector(addPost))
    } else {
        addPostBarItem = UIBarButtonItem(title: "Add",action: #selector(addPost))
        // Fallback on earlier versions
    }
    navigationItem.rightBarButtonItems = [addPostBarItem]