iOS 获取html中的所有图片链接地址

//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 = @"<img(.*?)>";
    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;
}

 

 

该方法传入一个heml代码字符串，然后返回html中包含的所有图片url