Problem with pulltorefrensh about pulltorefreshview HOT 7 CLOSED

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
    if ([keyPath isEqualToString:@"contentOffset"]) {
        if (scrollView.isDragging) {
            if (state == PullToRefreshViewStateReady) {
                if (scrollView.contentOffset.y > -65.0f && scrollView.contentOffset.y < 0.0f) 
                    [self setState:PullToRefreshViewStateNormal];
            } else if (state == PullToRefreshViewStateNormal) {
                if (scrollView.contentOffset.y < -65.0f)
                    [self setState:PullToRefreshViewStateReady];
            } else if (state == PullToRefreshViewStateLoading) {
                if (scrollView.contentOffset.y >= 0)
                    scrollView.contentInset = UIEdgeInsetsZero;
                else
                    scrollView.contentInset = UIEdgeInsetsMake(MIN(-scrollView.contentOffset.y, 60.0f), 0, 0, 0);
            }
        } else {
            if (state == PullToRefreshViewStateReady) {
                [UIView beginAnimations:nil context:NULL];
                [UIView setAnimationDuration:0.2f];
                [self setState:PullToRefreshViewStateLoading];
                [UIView commitAnimations];

                if ([delegate respondsToSelector:@selector(pullToRefreshViewShouldRefresh:)])
                    [delegate pullToRefreshViewShouldRefresh:self];
            }
        }

        // Fix for view moving laterally with webView
        self.frame = CGRectMake(scrollView.contentOffset.x, self.frame.origin.y, self.frame.size.width, self.frame.size.height);
    }
}