在xib文件中拖入UIWebView。
使用代码为UIWebView的滚动控件增加搜索栏：
UISearchBar* searchBar=[[[UISearchBar alloc]initWithFrame:CGRectMake(0, -44, 320, 44)]autorelease];
[self.browser.scrollView addSubview:searchBar];
self.topBar=searchBar;
[[self.browser scrollView] setContentInset:UIEdgeInsetsMake(44, 0, 0, 0)];
self.browser.scrollView.scrollIndicatorInsets=UIEdgeInsetsMake(44, 0, 0, 0);
[self.browser.scrollView setContentOffset:CGPointMake(0, -44)];//webview加载后会默认给滚动条设置滚动位置为0，0。
self.browser.scrollView.delegate=self;//给滚动条加代理来调整滚动条指示控件的位置
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
float y=scrollView.contentOffset.y;
if (y>0) {//topbar不可见
scrollView.scrollIndicatorInsets=UIEdgeInsetsMake(0, 0, 0, 0);
}else{//topbar可见
scrollView.scrollIndicatorInsets=UIEdgeInsetsMake(-y, 0, 0, 0);
}
}
//删除UIWebView的阴影效果
UIView* lastView = [[[[self.browser subviews] objectAtIndex:0] subviews] lastObject];
for(UIView *wview in [[[self.browser subviews] objectAtIndex:0] subviews]) {
if([wview isKindOfClass:[UIImageView class]]) {
if (wview!=lastView) {//this is scroll indicator
wview.hidden = YES;
}
}
}
转http://qiufangzhou.blog.163.com/blog/static/506421802012347019554/
UIWebView的Scroll事件的监测
http://three20.pypt.lt/uiwebview-tap-scroll-detection