Call endRefreshing(at: .top) has no effect

If I only add PullToRefresh on top and not bottom, then calling endRefreshing(at: .top) will have no effect.

In addition, if the top constraint of scrollView can follow the height-change of the navigation bar (make.edges.equalToSuperview()), like Twitter or YouTube app, scrollview will bounce and other problems.

[wuxiangru]

func endRefreshing() {
// guard isEnabled else { return }

    if state == .loading {
        state = .finished
    }
}

去掉

[pokeduck]

If I only add PullToRefresh on top and not bottom, then calling endRefreshing(at: .top) will have no effect.

In addition, if the top constraint of scrollView can follow the height-change of the navigation bar (make.edges.equalToSuperview()), like Twitter or YouTube app, scrollview will bounce and other problems.

Invoke refreshControl.setEnable(isEnabled: true) before calling endRefreshing(at: .top).