this.$Modal.confirm({
          render: (h) => {
            return h("Button", {
              props: {
                value: this.value,
                type: "primary",
              },
              on: {
                click: function (e) {
                  // modalthis null
                  this.$Modal.confirm({
                    render: (h) => {
                      return h("Input", {
                      })
                    }
                  })
                }
              }
            })
          }
        })
        how can another mode layer pop up?
I am using iView"s modal
here.