An easy way to use pull-to-refresh

There is an issue with RamotionBallLayer()

When you use the RamotionAnimation, a user can scroll down through a list (assuming the refresh is in header). When they scroll back up quickly, however, I noticed a bug where the while cirlce will appear, blocking content on the screen, even though it is not animating.

A quick-fix for this would be set the 'isHidden' attribute in the initialization method as shown below:

class RamotionBallLayer: CALayer {

init(frame: CGRect, duration: CFTimeInterval, moveUpDist: CGFloat, color: UIColor = .white) {
        upDuration = duration
        super.init()
        self.frame = frame
        let circleWidth = min(frame.size.width, frame.size.height)
        circleLayer = CircleLayer(size: circleWidth, moveUpDist: moveUpDist, frame: frame, color: color)
        addSublayer(circleLayer)

        //  Hide the ball layer on init
        isHidden = true
    }

}

Hey,

Thanks for your awesome repo.

I installed it by using CocoaPods, I added this line to my Podfile: pod 'CRRefresh' However, there are many missing files as you can see in the attached image. what is the problem? I need to use FastAnimator but I can't because all its files didn't install.

您好，首先很感谢作者写了这个纯swift的刷新控件库，通过学习源码，自己也学习了很多，再次感谢！ 我在使用过程中遇到了上面的问题，猜测应该是在下拉刷新重新计算scrollview的contentInset.top时，多计算了一次animator.hold,导致刷新结束后，tableview会有向上偏移的情况，刚好偏移一个animator.hold。 项目进度原因，我并没有深入调用机制去查询根本原因，这里我用了比较trick的方法解决了此问题。 CRRefresh 版本 1.0.9 文件： CRRefreshHeaderView.swift lineNum: 104

如果作者有时间，麻烦看下此问题，期待下个版本解决，感谢！

When we force refresh using the HeadRefresh (with NormalHeaderAnimator), when the scrollView populates with cells (in my case is a collectionView) the first cell is partially hidden behind the navigation bar, but after touching/scrolling the scrollView the collectionView automatically snaps itself on the correct position and the bug is gone.

After headRefresh finishes to load the data:

After touching/scrolling the collectionView:

Has anyone experienced this before? How can I fix it?

Hi, I'm just wondering if this library can have the options to change the title color or pull to refresh description, or the color of the activity indicator etc.

Thanks

It doesn't appear that there is much activity support iOS13/Swift 5, so thought I'd drop a very hacky solution for supporting pull-to-refresh, particularly in a modal.

Since CRRefresh uses tableView.addSubview instead of tableView.refreshControl, the experience gets a bit odd in iOS13, in particular with modal sheets. Pulling down to refresh will actually dismiss the modal, instead of refreshing the tableView. There are some solutions that use isModalInPresentation = true, but that allows for a slight drag of the modal, and no affordance showing that PTR is happening. See this SO thread:

My solution was to fake the RefreshControl, but hide it.

extension UITableView {
  func iOS13RefreshControlHack() {
    if #available(iOS 13.0, *) {
      let refreshControl       = UIRefreshControl()
      refreshControl.tintColor = .clear
      
      self.refreshControl      = refreshControl
      self.refreshControl?.addTarget(self, action: #selector(handleRefreshControl), for: .valueChanged)
    }
  }
  
  @objc func handleRefreshControl() {
    self.refreshControl?.endRefreshing()
  }
}

Then call from your tableView via (or whatever better name you choose):

self.tableView.iOS13RefreshControlHack()

This triggers the modal to behave properly when PTR is requested, but also continues to show the CRRefresh custom spinners/checkmark instead. In addition, you can still dismiss the modal by pulling down from the navigationBar, but the modal does not move when pulling on the table cells.

Hope it helps someone.