swift 需求： 导航栏和HeaderView 使用一个背景图片。

办法1： 

问题界面

需求： 导航栏和HeaderView 使用一个背景图片。
解决方案： 让 导航栏 变成透明。

override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        // 1、设置导航栏半透明
        self.navigationController?.navigationBar.isTranslucent = true
        // 2、设置导航栏背景图片
        self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
        
        // 3、设置导航栏阴影图片:导航栏 下面那条线
        self.navigationController?.navigationBar.shadowImage = UIImage()
}

　　

实现效果

办法二：自定义导航栏

安全区效果

导航栏实现

使用

        /// 导航view
        let navView = createDiyNavgationalView(titleStr: "营业时间选择", addView: self.view)

　　

    /// 仿系统导航栏
    func createDiyNavgationalView(titleStr: String?, addView:UIView) -> UIView{
        let bgView = JYUIModel.createView()
        bgView.backgroundColor = UIColor.clear
        
        let backIV = JYUIModel.createBtn()
        backIV.setImage(UIImage(named: "back_normal_white"), for: .normal)
        backIV.addTarget(self, action: #selector(back), for: .touchUpInside)
        backIV.adjustsImageWhenHighlighted = false
        backIV.layer.removeAllAnimations()
        addView.addSubview(backIV)
        
        let titleLabel = JYUIModel.creatLabe(text: titleStr, font: UIFont.systemFont(ofSize: 18), textColor: UIColor.init(hexString: "#FFFFFF"))
        
        bgView.addSubview(backIV)
        bgView.addSubview(titleLabel)
        let vd:[String:UIView] = ["backIV":backIV, "titleLabel":titleLabel ]
        bgView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "|[backIV(44)]-(>=44)-[titleLabel]-(>=44)-|", options: [.alignAllCenterY], metrics: nil, views: vd))
        bgView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:[backIV(44)]|", options: [.alignAllCenterY], metrics: nil, views: vd))
        titleLabel.centerXAnchor.constraint(equalTo: bgView.centerXAnchor).isActive = true
        titleLabel.centerXAnchor.constraint(equalTo: bgView.centerXAnchor).isActive = true
        if #available(iOS 11.0, *) , isPhoneX {
            bgView.heightAnchor.constraint(equalToConstant: 44 + JYWindow.safeAreaInsets.top).isActive = true
        } else {
            bgView.heightAnchor.constraint(equalToConstant: 64).isActive = true
        }
        return bgView
    }
    
    @objc private func back(){
        self.navigationController?.popViewController(animated: true)
    }

　　

2.上边营业时间的view

extension ShopBussionTimeController{
    private func configUI111() {
        /// 营业时间
        let businessHoursView = createTopView()
        
        /// 导航view
        let navView = createDiyNavgationalView(titleStr: "营业时间选择", addView: self.view)
        
        self.view.addSubview(selectDayView)
        let vd: [String: UIView] = ["businessHoursView":businessHoursView,
                                    "navView":navView]
        self.view.jy.addSubViews(vd)
        self.view.sendSubviewToBack(businessHoursView)
        self.view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "|[businessHoursView]|", options: [], metrics: nil, views: vd))
        view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "|[navView]|", options: [], metrics: nil, views: vd))
        self.view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:[businessHoursView]", options: [], metrics: nil, views: vd))
        self.view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[navView]", options: [], metrics: nil, views: vd))
        
        let offset = Screen_Offset > 1 ? Screen_Offset : 1
        var headViewheight =  188 * offset //188 是设计图的高度
        if #available(iOS 11.0, *) {
            businessHoursView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
            if isPhoneX {
                headViewheight = headViewheight + JYWindow.safeAreaInsets.top - 20
            }
        } else {
            businessHoursView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
        }
        businessHoursView.heightAnchor.constraint(equalToConstant: headViewheight).isActive = true
    }
}