突出显示UIWebView中的文本

我有UIWebView显示HTML页面文章。 我需要searchstring或文本，并突出显示。 我提到这个文件http://www.icab.de/blog/2010/01/12/search-and-highlight-text-in-uiwebview/ 。 但没有发生。

- (void)viewDidLoad { [wbCont loadHTMLString:webString baseURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]]]; NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults]; // getting an NSString NSString *savedValue = [prefs stringForKey:@"got"]; NSLog(@"saved is %@",savedValue); [self highlightAllOccurencesOfString:savedValue]; [self.view addSubview:wbCont]; [self.view setBackgroundColor:[UIColor grayColor]]; } - (NSInteger)highlightAllOccurencesOfString:(NSString*)str { NSString *path = [[NSBundle mainBundle] pathForResource:@"UIWebViewSearch" ofType:@"js"]; NSString *jsCode = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil]; [wbCont stringByEvaluatingJavaScriptFromString:jsCode]; NSString *startSearch = [NSString stringWithFormat:@"window.onload = function (){uiWebview_HighlightAllOccurencesOfString('%@')}",str]; [wbCont stringByEvaluatingJavaScriptFromString:startSearch]; NSString *result = [wbCont stringByEvaluatingJavaScriptFromString:@"uiWebview_SearchResultCount"]; return [result integerValue]; } 

Answer 1

我会发布我如何解决类似的情况。 我用一个search显示控制器在一个可用视图中search。 取而代之的是UIWebView，我使用了由Scott Kohler UIWebViewsearch创build的以下子类。 我希望这可以帮助你：

SearchWebView.h

 #import <Foundation/Foundation.h> @interface SearchWebView : UIWebView - (NSInteger)highlightAllOccurencesOfString:(NSString*)str; - (void)removeAllHighlights; @end 

SearchWebView.m

 #import "SearchWebView.h" @implementation SearchWebView - (NSInteger)highlightAllOccurencesOfString:(NSString*)str { NSString *path = [[NSBundle mainBundle] pathForResource:@"UIWebViewSearch" ofType:@"js"]; NSString *jsCode = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil]; [self stringByEvaluatingJavaScriptFromString:jsCode]; NSString *startSearch = [NSString stringWithFormat:@"window.onload = function (){uiWebview_HighlightAllOccurencesOfString('%@')}",str]; [self stringByEvaluatingJavaScriptFromString:startSearch]; NSString *result = [self stringByEvaluatingJavaScriptFromString:@"uiWebview_SearchResultCount"]; return [result integerValue]; } - (void)removeAllHighlights { [self stringByEvaluatingJavaScriptFromString:@"uiWebview_RemoveAllHighlights()"]; } @end 

javascript包含以下代码：

 var uiWebview_SearchResultCount = 0; function uiWebview_HighlightAllOccurencesOfStringForElement(element,keyword) { if (element) { if (element.nodeType == 3) { // Text node while (true) { //if (counter < 1) { var value = element.nodeValue; // Search for keyword in text node var idx = value.toLowerCase().indexOf(keyword); if (idx < 0) break; // not found, abort //(value.split); //we create a SPAN element for every parts of matched keywords var span = document.createElement("span"); var text = document.createTextNode(value.substr(idx,keyword.length)); span.appendChild(text); span.setAttribute("class","uiWebviewHighlight"); span.style.backgroundColor="yellow"; span.style.color="black"; uiWebview_SearchResultCount++; // update the counter text = document.createTextNode(value.substr(idx+keyword.length)); element.deleteData(idx, value.length - idx); var next = element.nextSibling; element.parentNode.insertBefore(span, next); element.parentNode.insertBefore(text, next); element = text; window.scrollTo(0,span.offsetTop); } } else if (element.nodeType == 1) { // Element node if (element.style.display != "none" && element.nodeName.toLowerCase() != 'select') { for (var i=element.childNodes.length-1; i>=0; i--) { uiWebview_HighlightAllOccurencesOfStringForElement(element.childNodes[i],keyword); } } } } } // the main entry point to start the search function uiWebview_HighlightAllOccurencesOfString(keyword) { uiWebview_RemoveAllHighlights(); uiWebview_HighlightAllOccurencesOfStringForElement(document.body, keyword.toLowerCase()); } // helper function, recursively removes the highlights in elements and their childs function uiWebview_RemoveAllHighlightsForElement(element) { if (element) { if (element.nodeType == 1) { if (element.getAttribute("class") == "uiWebviewHighlight") { var text = element.removeChild(element.firstChild); element.parentNode.insertBefore(text,element); element.parentNode.removeChild(element); return true; } else { var normalize = false; for (var i=element.childNodes.length-1; i>=0; i--) { if (uiWebview_RemoveAllHighlightsForElement(element.childNodes[i])) { normalize = true; } } if (normalize) { element.normalize(); } } } } return false; } // the main entry point to remove the highlights function uiWebview_RemoveAllHighlights() { uiWebview_SearchResultCount = 0; uiWebview_RemoveAllHighlightsForElement(document.body); } 

在cellForRowAtIndexPath和总结：

 MyModel *model; if(isSearching) model = [filteredArray objectAtIndex:indexPath.row]; else model = [allItems objectAtIndex:indexPath.row]; SearchWebView *descripcion = (SearchWebView *)[cell viewWithTag:3]; descripcion.delegate = self; descripcion.scrollView.scrollEnabled = NO; descripcion.scrollView.bounces = NO; [descripcion loadHTMLString:[NSString stringWithFormat:@"<html><head><title></title><style type=\"text/css\">img{float:rigth !important;}</style></head><body style=\"text-align:justify; font-family:Helvetica\"><p>%@</p></body></html>",[resultado itemDescr]] baseURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]]]; if(isSearching)[descripcion highlightAllOccurencesOfString:[NSString stringWithFormat:@"%@",searchBar.text]];