引自：http://www.cnblogs.com/zhuolaiqiang/archive/2011/06/24/2088906.html
//js文件内容
SearchWebView.js:
var MyApp_SearchResultCount = 0;
function MyApp_HighlightAllOccurencesOfStringForElement(element,keyword) {
if (element) {
if (element.nodeType == 3) { // Text node
while (true) {
var value = element.nodeValue; // Search for keyword in text node
var idx = value.toLowerCase().indexOf(keyword);
if (idx < 0) break; // not found, abort
var span = document.createElement("span");
var text = document.createTextNode(value.substr(idx,keyword.length));
span.appendChild(text);
span.setAttribute("class","MyAppHighlight");
span.style.backgroundColor="yellow";
span.style.color="Red";
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;
MyApp_SearchResultCount++; // update the counter
}
} 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--) {
MyApp_HighlightAllOccurencesOfStringForElement(element.childNodes[i],keyword);
}
}
}
}
}
// the main entry point to start the search
function MyApp_HighlightAllOccurencesOfString(keyword) {
MyApp_RemoveAllHighlights();
MyApp_HighlightAllOccurencesOfStringForElement(document.body, keyword.toLowerCase());
}
// helper function, recursively removes the highlights in elements and their childs
function MyApp_RemoveAllHighlightsForElement(element) {
if (element) {
if (element.nodeType == 1) {
if (element.getAttribute("class") == "MyAppHighlight") {
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 (MyApp_RemoveAllHighlightsForElement(element.childNodes[i])) {
normalize = true;
}
}
if (normalize) {
element.normalize();
}
}
}
}
return false;
}
// the main entry point to remove the highlights
function MyApp_RemoveAllHighlights() {
MyApp_SearchResultCount = 0;
MyApp_RemoveAllHighlightsForElement(document.body);
}
//UIWebView+SearchWebView.h
#import <UIKit/UIKit.h>
@interface UIWebView (SearchWebView)
- (NSInteger)highlightAllOccurencesOfString:(NSString*)str;
- (void)removeAllHighlights;
@end
//UIWebView+SearchWebView.m
#import "UIWebView+SearchWebView.h"
@implementation UIWebView (SearchWebView)
- (NSInteger)highlightAllOccurencesOfString:(NSString*)str
{
NSString *path = [[NSBundle mainBundle] pathForResource:@"SearchWebView" ofType:@"js"];
NSString *jsCode = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
[self stringByEvaluatingJavaScriptFromString:jsCode];
NSString *startSearch = [NSString stringWithFormat:@"MyApp_HighlightAllOccurencesOfString('%@')",str];
[self stringByEvaluatingJavaScriptFromString:startSearch];
NSString *result = [self stringByEvaluatingJavaScriptFromString:@"MyApp_SearchResultCount"];
return [result integerValue];
}
- (void)removeAllHighlights
{
[self stringByEvaluatingJavaScriptFromString:@"MyApp_RemoveAllHighlights()"];
}
@end
//在调用的UIWebView中调用搜索关键字，记住，一定要在加载网页后显示（写在-(void)webViewDidFinishLoad:代理方法里）
[webView1 highlightAllOccurencesOfString:@“搜索的关键字”];
解决方法：在targets -> Build Phases -> Copy Bundle Resources -> + (将js文件加进Copy Bundle Resources)
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