//获取webView中的所有图片URL- (NSArray *) getImageurlFromHtml:(NSString *) webString{    NSMutableArray * imageurlArray = [NSMutableArray arrayWithCapacity:1];        //标签匹配    NSString *parten = @"
    
     ";    NSError* error = NULL;    NSRegularExpression *reg = [NSRegularExpression regularExpressionWithPattern:parten options:0 error:&error];        NSArray* match = [reg matchesInString:webString options:0 range:NSMakeRange(0, [webString length] - 1)];        for (NSTextCheckingResult * result in match) {                //过去数组中的标签        NSRange range = [result range];        NSString * subString = [webString substringWithRange:range];                        //从图片中的标签中提取ImageURL        NSRegularExpression *subReg = [NSRegularExpression regularExpressionWithPattern:@"http://(.*?)\"" options:0 error:NULL];        NSArray* match = [subReg matchesInString:subString options:0 range:NSMakeRange(0, [subString length] - 1)];        NSTextCheckingResult * subRes = match[0];        NSRange subRange = [subRes range];        subRange.length = subRange.length -1;        NSString * imagekUrl = [subString substringWithRange:subRange];                //将提取出的图片URL添加到图片数组中        [imageurlArray addObject:imagekUrl];    }        return imageurlArray;}