Pull to Refresh

gistfile1.m

#pragma mark - Scroll View Delegate

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
	[super scrollViewDidScroll:scrollView];
	
	if (_refreshInProgress) return;
	
	if (self.tableView.contentOffset.y > 50.0 && self.tableView.contentOffset.y < 140.0) {
		if (self.tableView.contentOffset.y <= 90.0) {
			[(RefreshView *)self.tableView.tableHeaderView displayInstructions];
		} else {
			[(RefreshView *)self.tableView.tableHeaderView hideInstructions];
		}
	}
}

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
	[super scrollViewDidEndDragging:scrollView willDecelerate:decelerate];
	
	if (self.tableView.contentOffset.y < 90.0) {
        _refreshInProgress = YES;
        
        [self.tableView setContentInset:UIEdgeInsetsMake(-100.0, 0.0, 0.0, 0.0)];
        
        [(RefreshView *)self.tableView.tableHeaderView startLoading];
        
        [self reloadData];
	}
}