首次下拉时header显示的是未修改前的pulltorefresh，请问如何修改？

[Kevinsamer]

已按照demo设置了header的文字，但是首次下拉不改变
xcode9.1，ios11.1，模拟器iphoneX
使用的是v0.8.8
望解答

lazy var header: DefaultRefreshHeader = {
let header = DefaultRefreshHeader.header()
header.setText("下拉刷新", mode: .pullToRefresh)
header.setText("释放刷新", mode: .releaseToRefresh)
header.setText("数据刷新成功", mode: .refreshSuccess)
header.setText("刷新中...", mode: .refreshing)
header.setText("数据刷新失败，请检查网络设置", mode: .refreshFailure)
header.tintColor = #colorLiteral(red: 0.9995891452, green: 0.6495086551, blue: 0.2688535452, alpha: 1)
header.imageRenderingWithTintColor = true
header.durationWhenHide = 0.4
return header
}()