如何从UIwebview复制文本

Question

我的网页浏览中有一些文字是我从html页面加载的。现在如果我想从Webview中选择一个特定的单词，那么所选的单词应该是高亮的。

我们可以在weebview中实现这种功能吗？

Answer 1

Search and highlight text in UIWebView

SearchWebView.h：

@interface UIWebView (SearchWebView)

- (NSInteger)highlightAllOccurencesOfString:(NSString*)str;
- (void)removeAllHighlights;

@end

SearchWebView.m：

@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