如何在uiwebview上提高滚动速度

Question

我使用下面的代码在UIWebview上滚动速度， 相比之前的滚动它的优良和良好，但我的克林特不满意，他问这样

  

滚动仍感觉僵硬。

webviews.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;

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

有没有提高滚动速度的选项？

Answer 1

在UIScrollViewDelegate

上拥有这些属性

CGPoint lastOffset;
NSTimeInterval lastOffsetCapture;
BOOL isScrollingFast;

然后为您的scrollViewDidScroll提供此代码：

- (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;
    }
}