从iOS 5.0以后 UIWebView本身就有scrollView属性
self.webView.scrollView.delegate = self;
// 开始
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
[UIView animateWithDuration:0.2 animations:^{
self.bannerMenu.alpha = 0.3;
}];
}
// 结束
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
[UIView animateWithDuration:0.2 animations:^{
self.bannerMenu.alpha = 1;
}];
}
