Uirefreshcontrol with Uicollectionview in iOS7

UIRefreshControl with UICollectionView in iOS7

Having the same problem and found a workaround that seems to fix it.

This seems to be happening because the UIScrollView is slowing down the tracking of the pan gesture when you pull past the edge of the scrollview. However, UIScrollView is not accounting for changes to contentInset during tracking. UIRefreshControl changes contentInset when it activates, and this change is causing the jump.

Overriding setContentInset on your UICollectionView and accounting for this case seems to help:

- (void)setContentInset:(UIEdgeInsets)contentInset {
  if (self.tracking) {
    CGFloat diff = contentInset.top - self.contentInset.top;
    CGPoint translation = [self.panGestureRecognizer translationInView:self];
    translation.y -= diff * 3.0 / 2.0;
    [self.panGestureRecognizer setTranslation:translation inView:self];
  }
  [super setContentInset:contentInset];
}

Interestingly, UITableView accounts for this by NOT slowing down tracking until you pull PAST the refresh control. However, I don't see a way that this behavior is exposed.

UIRefreshControl on UICollectionView only works if the collection fills the height of the container

Try this:

self.collectionView.alwaysBounceVertical = YES;

Complete code for a UIRefreshControl

UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
refreshControl.tintColor = [UIColor grayColor];
[refreshControl addTarget:self action:@selector(refershControlAction) forControlEvents:UIControlEventValueChanged];
[self.collectionView addSubview:refreshControl];
self.collectionView.alwaysBounceVertical = YES;

UIRefreshControl not centred with contentInset set

OK, fixed the problem by not setting collectionView.contentInset. Instead I set on the flowLayout

i.e.

flowLayout.sectionInset = UIEdgeInsetsMake(0, 20, 20, 20);

Pull to refresh in UICollectionView in ViewController

From the storyboard, you need to link the collection view to the appropriate controller file, using Ctrl + Drag from the collection view object. It needs to be linked via an @IBOutlet.

Also, you should Ctrl + Drag from the collection view to the view controller object on the storyboard and select Data Source and Delegate so that the collection view is correctly linked.

Let me know if this helps or if I have misunderstood your situation.

iOS7 UIRefreshControl changes contentInset

This is probably the reason why UIRefreshControl is currently only supported on UITableViewController, rather than by addition to any scrollview (which you can get away with, in many cases).

The refresh control does its magic by tinkering with the content insets of the scrollview - particularly when it ends refreshing. Unfortunately the view controller is also tinkering with the content insets of the scroll view to fit it under the translucent nav and status bars. Fun ensues. Is this also an issue on iOS 6 (or, "good old iOS6" as I called it when dealing with the same issue).

The quickest solution is probably to add your table view as a child UITableViewController instead of a simple subview. I think that UITableViewController manages the insets for you at the end of the refresh. If that doesn't work, I've got workarounds for this but it will have to wait until I get back in the office.

UIRefreshControl - Pull To Refresh in iOS 7

You do not have to explicitly set frame or start UIRefreshControl. If it is a UITableView or UICollectionView, it should work like a charm by itself. You do need to stop it though.

Here is how you code should look like:

- (void)viewDidLoad {
    [super viewDidLoad];
    refreshControl = [[UIRefreshControl alloc]init];
    [refreshControl addTarget:self action:@selector(refreshTable) forControlEvents:UIControlEventValueChanged];

    if (@available(iOS 10.0, *)) {
        self.mytableView.refreshControl = refreshControl;
    } else {
        [self.mytableView addSubview:refreshControl];
    }
}

In your refreshTable function, you need to stop it when you are done refreshing your data. Here is how it is going to look like:

- (void)refreshTable {
    //TODO: refresh your data
    [refreshControl endRefreshing];
    [self.mytableView reloadData];
}

Please note that if you are refreshing your data asynchronously then you need to move endRefreshing and reloadData calls to your completion handler.

UICollectionView UIRefreshControl Doesn't Animate After Visiting a Different View

After completed loading You have to stop the refreshing

[tableView.refreshControl endRefreshing]

Hope its useful for you..:)

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