How to increase scrolling speed on uiwebview

Question

i used bellow code for scrolling speed on UIWebview, compare to previous scrolling its fine and good, but my clint was not satisfied and he asked like this

Scrolling still feels stiff.

webviews.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;

[webviews loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"site URL"]]];
    webviews.scalesPageToFit =YES;`

is there any option to increase scrolling speed?

Answer 1

Have these properties on your UIScrollViewDelegate

CGPoint lastOffset;
NSTimeInterval lastOffsetCapture;
BOOL isScrollingFast;

Then have this code for your scrollViewDidScroll:

- (void) scrollViewDidScroll:(UIScrollView *)scrollView {    
    CGPoint currentOffset = self.currentChannelTableView.contentOffset;
    NSTimeInterval currentTime = [NSDate timeIntervalSinceReferenceDate];

    NSTimeInterval timeDiff = currentTime - lastOffsetCapture;
    if(timeDiff > 0.1) {
        CGFloat distance = currentOffset.y - lastOffset.y;
        //The multiply by 10, / 1000 isn't really necessary.......
        CGFloat scrollSpeedNotAbs = (distance * 10) / 1000; //in pixels per millisecond

        CGFloat scrollSpeed = fabsf(scrollSpeedNotAbs);
        if (scrollSpeed > 0.5) {
            isScrollingFast = YES;
            NSLog(@"Fast");
        } else {
            isScrollingFast = NO;
            NSLog(@"Slow");
        }        

        lastOffset = currentOffset;
        lastOffsetCapture = currentTime;
    }
}