SolarBT_iOS/SolarBT/Classes/Main/RootNavigationController.swift

//
//  RootNavigationController.swift
//  SolarStationSwift
//
//  Created by weclouds on 2018/8/8.
//  Copyright © 2018年 weclouds. All rights reserved.
//

import UIKit

class RootNavigationController: UINavigationController {

    var callback : (()->Void)? // 回调函数
    
    var navTitle: String?
    
    override func viewDidLoad() {
        super.viewDidLoad()
          setNavigationBar()
        // Do any additional setup after loading the view.
    }
    func setNavigationBar()  {
        let apperance = UINavigationBar.appearance()
    
//        //设置半透明效果
     self.navigationBar.isTranslucent = false
        //将导航栏上按钮颜色
        apperance.tintColor = UIColor(hexString: "222222")
     //消除分割线
       navigationBar.setBackgroundImage(UIImage(), for: .default)
      navigationBar.shadowImage = navBarShadowImage()
        //navigationBar.isHidden = true
        let dict:NSDictionary = [NSAttributedString.Key.foregroundColor: UIColor(hexString: "#222222"),NSAttributedString.Key.font : UIFont(name: PingFangSC_Semibold, size: 19)]
        //标题颜色
        navigationBar.titleTextAttributes = dict as? [NSAttributedString.Key : AnyObject]
        
//        //设置导航栏title格式
  
        
        
        let backAppearance = UIBarButtonItem.appearance()
        //设置导航栏返回按钮
        if #available(iOS 11, *){
            backAppearance.setBackButtonTitlePositionAdjustment(UIOffset(horizontal: -200, vertical: 0), for: UIBarMetrics.default)
            
            let backButtonImage = UIImage(named: "fanhui")?.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
           
            apperance.backIndicatorImage = backButtonImage
            apperance.backIndicatorTransitionMaskImage = backButtonImage

        }else {
            //返回按钮没有文字
            backAppearance.setBackButtonTitlePositionAdjustment(UIOffset(horizontal: -200, vertical: 0), for: UIBarMetrics.default)
            let backButtonImage = UIImage(named: "fanhui")?.withRenderingMode(UIImage.RenderingMode.alwaysOriginal)
            backAppearance.setBackButtonBackgroundImage(backButtonImage?.resizableImage(withCapInsets: UIEdgeInsets(top: 0, left: 32, bottom: 0, right: 0)), for: UIControl.State.normal, barMetrics: UIBarMetrics.default)
            
        }
    }
    
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    

    override func pushViewController(_ viewController: UIViewController, animated: Bool) {
        
        if self.viewControllers.count > 0 {
            viewController.hidesBottomBarWhenPushed = true
            viewController.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: UIBarButtonItem.Style.plain, target: self, action: #selector(RootNavigationController.backAction ))
        }
        super.pushViewController(viewController, animated: animated)
    }
   
    @objc func backAction()  {
        
        log.debug("当前控制器 \(self.topViewController))")
       // if self.topViewController == sbtup
       
        let detailVC = SBTDeviceDetaiVCtr()
        if self.topViewController == detailVC{
            if callback != nil{
                callback!()
            }
        }
        self.navigationController?.popViewController(animated: true)
    }
    
    func navBarShadowImage() -> UIImage? {
        UIGraphicsBeginImageContextWithOptions(CGSize(width: KSCREENWIDTH, height: 0.5), false, 0)
        //画线
        let path =  UIBezierPath(rect: CGRect(x: 0, y: 0, width: KSCREENWIDTH, height: 0.5))
        UIColor.white.setFill()//NavigationBar分割线颜色
        path.fill()
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }
    
}