swift 4.2

俩个方法 

1. 创建类写成 类方法

import UIKit
/*
 * 注释：获得VC
 * 1.字符串 和使用的控制器，直接跳转
 * 2.用过字符串获得对应VC
 */
class JYGetPushVc: NSObject {

    /// 指定字符串VC跳转,设置title
    static func pushVcByVcNameAndTitle(pushVcNameStr:String, pushVcTitleStr:String? = nil, weakVc:UIViewController?){
        guard let namespace = Bundle.main.infoDictionary?["CFBundleExecutable"]as? String else{
            return debugPrint("JYGetPushVc 调用 pushVcByVcNameAndTitle, namespace不存在")
        }
        let clsName = namespace + "." + pushVcNameStr
        guard let cls = NSClassFromString(clsName) as? UIViewController.Type else{
            return debugPrint("JYGetPushVc 调用 pushVcByVcNameAndTitle, 项目中没有控制器 === (pushVcNameStr)")
        }
        let vc = cls.init()
        if let titleStr = pushVcTitleStr{
            vc.title = titleStr
        }
        weakVc?.navigationController?.pushViewController(vc, animated: true)
    }
    
    /// 根据字符串获得对应控制器，使用的时候as, 传递参数
    static func getVc(pushVcNameStr:String) -> UIViewController?{
        
        guard let namespace = Bundle.main.infoDictionary?["CFBundleExecutable"]as? String else{
            debugPrint("JYGetPushVc 调用 getVc, namespace不存在")
            return nil
        }
        let clsName = namespace + "." + pushVcNameStr
        guard let cls = NSClassFromString(clsName) as? UIViewController.Type else{
            debugPrint("JYGetPushVc调用getVc项目中没有 控制器 === (pushVcNameStr)")
            return nil
        }
        return cls.init()
    }
}

　　

类使用

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        //这里 VC需要传递参数进去的
        var pushVc : UIViewController?

        if let vc = JYGetPushVc.getVc(pushVcNameStr: vcNameArr[indexPath.section][indexPath.row]) as? JYWorksShowController{
            vc.title = titleArr[indexPath.section][indexPath.row]
            pushVc = vc
        }
        
        //这是主页面看需求隐藏tabbar
        self.hidesBottomBarWhenPushed = true
        
        if let vc = pushVc{
            self.navigationController?.pushViewController(vc, animated: true)
        }else{
            //这里不需要指定控制器。设置VC的属性的。
            JYGetPushVc.pushVcByVcNameAndTitle(pushVcNameStr: vcNameArr[indexPath.section][indexPath.row], pushVcTitleStr: titleArr[indexPath.section][indexPath.row], weakVc: self)
        }
        
        //跳转打开，不然回到首页 没有tabbar
        self.hidesBottomBarWhenPushed = false
    }

　　

2. 在当前控制器 写俩方法

方法1

 /// 指定字符串VC跳转,设置title
    func pushVcByVcNameAndTitle(vcName:String, vcTitleName:String = "", isHideBottomBar:Bool = false){
        if let namespace = Bundle.main.infoDictionary?["CFBundleExecutable"]as? String{
            let clsName = namespace + "." + vcName
            if let cls = NSClassFromString(clsName) as? UIViewController.Type{
                let vc = cls.init()
                vc.title = vcTitleName
                self.navigationController?.pushViewController(vc, animated: true)
            }
        }
    }

　　

方法2

    /// 根据字符串获得对应控制器，使用的时候as, 传递参数
    func pushVcByVcNameAndTitle(vcName:String) -> UIViewController?{
        if let namespace = Bundle.main.infoDictionary?["CFBundleExecutable"]as? String{
            let clsName = namespace + "." + vcName
            if let cls = NSClassFromString(clsName) as? UIViewController.Type{
                let vc = cls.init()
                return vc
            }
        }
        return nil
    }

　　

3.方法使用

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        //这里 VC需要传递参数进去的
        var pushVc : UIViewController?

       //具体VC 设置 vc的属性
        if let vc1 = pushVcByVcNameAndTitle(vcName: vcNameArr[indexPath.section][indexPath.row]) as? JYWorksShowController{
            vc1.title = titleArr[indexPath.section][indexPath.row]
            //vc1.arr = self.dataArr
            //vc1.title = vcTitleArr[index.row]
            pushVc = vc1
        }

        //这是主页面看需求隐藏tabbar
        self.hidesBottomBarWhenPushed = true
        if let vc = pushVc{
            self.navigationController?.pushViewController(vc, animated: true)
        }else{
            //这里不需要指定控制器。设置VC的属性的。
            pushVcByVcNameAndTitle(vcName: vcNameArr[indexPath.section][indexPath.row], vcTitleName: titleArr[indexPath.section][indexPath.row], isHideBottomBar: true)
        }
        //跳转打开，不然回到首页 没有tabbar
        self.hidesBottomBarWhenPushed = false
    }