@objc func btn4Act() {//跳转拼多多
        var bSucc: Bool = false
        let reqUrl: String = "pinduoduo://com.xunmeng.pinduoduo/" 
        if #available(iOS 10, *) {
            UIApplication.shared.open(reqUrl.url!, options: [:], completionHandler: { (success) in
                //                print("跳转是否成功?\(res)")
                //                if success as Bool {
                bSucc = success
                if !bSucc {
                    let alertController = UIAlertController(title: "提示",
                                                            message: "您手机中未安装拼多多，该功能受限", preferredStyle: .alert)
                    let cancelAction = UIAlertAction(title: "我知道了", style: .cancel, handler:{
                        action in
                        
                    })
                    alertController.addAction(cancelAction)
                    self.present(alertController, animated: true, completion: nil)
                }
                //                }
            })
        }else {
            bSucc = UIApplication.shared.openURL(reqUrl.url!)
            if !bSucc {
                let alertController = UIAlertController(title: "提示",
                                                        message: "您手机中未安装拼多多，该功能受限", preferredStyle: .alert)
                let cancelAction = UIAlertAction(title: "我知道了", style: .cancel, handler:{
                    action in
                    
                })
                alertController.addAction(cancelAction)
                self.present(alertController, animated: true, completion: nil)
            }
        }