Question

我有这段代码：

#pragma mark - UIScrollViewDelegate Methods

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    self.lastOffsetY = scrollView.contentOffset.y;
}

- (void) scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
{
    if (self.canAnimateBars)
        [self animeteBars:scrollView];
}

- (void) scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
    if(self.canAnimateBars)
        [self animeteBars:scrollView];
}

-(void)animeteBars:(UIScrollView *)scrollView {
    bool hide = (scrollView.contentOffset.y > self.lastOffsetY);

    [self.view layoutIfNeeded];

    if (hide)
        self.quickLinkToolBarBotom.constant = -44.0;
    else
        self.quickLinkToolBarBotom.constant = 0.0;

    [[self navigationController] setNavigationBarHidden:hide animated:YES];
}

#pragma mark - UIWebViewDelegate Methods

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    self.canAnimateBars = YES;
}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
    NSLog(@"Error: %@", error.localizedDescription);
}

它工作正常，但想存档Safari动画的相同行为。

我已经尝试过这个库AMScrollingNavbar，但我无法使用工具栏。

在我像在Safari中滚动Web视图时，如何进行计算以移动条形图。

感谢您的帮助。

Answer 1

您可以使用此代码。我认为这段代码用于你。

-(void)animeteBars:(UIScrollView *)scrollView {

    bool hide = (scrollView.contentOffset.y > self.lastOffsetY);

    [self.view layoutIfNeeded];
    CGFloat duration = 0.3;

    if (hide)
    {
       [UIView animateWithDuration:duration animations:^{
          self.quickLinkToolBarBotom.constant = -44.0;
        } completion:nil];

    }
    else
    {
            [UIView animateWithDuration:duration animations:^{
          self.quickLinkToolBarBotom.constant = 0.0;
        } completion:nil];
    }
    [[self navigationController] setNavigationBarHidden:hide animated:YES];
}

隐藏导航栏和工具栏Safari样式

1 个答案: