给UIWebView增加搜索栏

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