Open Radar

 
I have noticed that when you start UIRefreshControl-s beginRefreshing , 
if you go to another view or press home button and then come back to this view , UIRefreshControl is not spinning anymore , its property says that its refreshing ( isRefreshing returns YES ) and if I try to call again beginRefreshing nothing changes

THIS IS HAPPENING ONLY ON iOS7+

Steps to Reproduce:
1. Create tableview with UIRefreshControl
2. Pull to refresh
3. Go to another view or Press Home button
4. Come back to the view which has UIRefreshControl

Expected Results:
UIRefreshControl should still animate ( spin ) 
( animates on iOS 6 )

Actual Results:
UIRefreshControl is stopped and not animating ( visible though )


Workaround:

manually stopping and re-animating conrol

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    if(self.refreshControl.isRefreshing) {
        CGPoint offset = self.tableView.contentOffset;
        [self.refreshControl endRefreshing];
        [self.refreshControl beginRefreshing];
        self.tableView.contentOffset = offset;
    }
}