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!

Solution 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()

Solution 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
    }
}

Solution 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
    }
}

Comments

[Abu Ul Hassan]

you may be looking for this one stackoverflow.com/questions/20223386/…

[Danchez]

Does ODRefreshControl have modifiable parameters that affect the pull distance? I was looking at it but didn't see anything that did. Or I could just be blind and have a terrible case of tunnel vision today.

[staticVoidMan]

@DanielSanchez: I haven't had the need to modify it yet. anyways, this may help: github.com/Sephiroth87/ODRefreshControl/pull/…

[staticVoidMan]

@DanielSanchez aah, in the ODRefreshControl.m modify the #define kMaxDistance 53 parameter. i guess that'll help

[Danchez]

You sir are a genius! Thanks a lot! I believe this is the solution for anyone trying to do the same thing I'm doing. I just went with ODRefreshControl and modified that #define kMaxDistance 53 constant to get my desired output. Woohoo!

[staticVoidMan]

@DanielSanchez : no probs :) i have edited my answer to include this important bit of information

[Fattie]

This answer would seem to be wrong now guys. You can just call .beginRefreshing() as Ashkan explains.