How Do I Shorten the Pull Distance on UIRefreshControl to Activate the Pull to Refresh Action?

Question

Hey StackOverflow People,

I've been trying to figure out this question for some time now but to no avail and I need some help. I have a UITableView close to the bottom of my app and there's not enough screen distance for the user to engage the refresh. Does anybody know how I can shorten the distance it takes to activate the pull to refresh action on a UIRefreshControl within a UITableView and UIWebView?

Thanks in advance everyone!

Answer 1

you can still use refreshControl but with some modifications!

add these code to your viewController:

var canRefresh = true

override func scrollViewDidScroll(scrollView: UIScrollView) {

    if scrollView.contentOffset.y < -100 { //change 100 to whatever you want

        if canRefresh && !self.refreshControl.refreshing {

            self.canRefresh = false
            self.refreshControl.beginRefreshing()

            self.refresh() // your viewController refresh function
        }
    }else if scrollView.contentOffset.y >= 0 { 

        self.canRefresh = true
    }
}

and as usual in the end of your refresh logic in self.refresh() function add :

   self.refreshControl.endRefreshing()

Answer 2

As per the Apple Docs, I don't see any way to modify UIRefreshControl parameters.
link: https://developer.apple.com/library/ios/documentation/uikit/reference/UIRefreshControl_class/Reference/Reference.html

Use a third-party component like ODRefreshControl (to customize the scroll-distance in order to activate the refresh, modify the #define kMaxDistance constant).

or...

Don't use the UIRefreshControl and instead implement your own logic in the -scrollViewDidScroll method like:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    if ((scrollView.contentOffset.y + scrollView.frame.size.height) >= scrollView.contentSize.height) {
        //refresh logic
    }
}

Answer 3

For Swift 3.2 and above :

var canRefresh = true

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    if scrollView.contentOffset.y < -100 {
        if canRefresh && !self.refreshControl.isRefreshing {
            self.canRefresh = false
            self.refreshControl.beginRefreshing()
            self.handleRefresh()
        }
    } else if scrollView.contentOffset.y >= 0 {
        self.canRefresh = true
    }
}