wx.showModal

 wx.showModal({

      title: '提示',

      content: '确定要退出！',

      howCancel: true,//是否显示取消按钮

      cancelText:"否",//默认是“取消”

      cancelColor:'skyblue',//取消文字的颜色

      confirmText:"是",//默认是“确定”

      confirmColor: 'skyblue',//确定文字的颜色

      success:function(res){

        if(res.cancel){

          console.log("取消退出");

        }else{

          console.log("确认退出，清空数据");

          wx.clearStorageSync();

          wx.navigateTo({

            url: '/pages/loginFoen/loginFoen',

          });

        }

      },fail:function(res){},

      complete:function(res){}

    });