content是根据网址获得的网页源码字符串
NSRegularExpression *regularExpretion=[NSRegularExpression regularExpressionWithPattern:@"<[^>]*>|\n" options:0 error:nil];//替换所有html和换行匹配元素为"-" content=[regularExpretion stringByReplacingMatchesInString:content options:NSMatchingReportProgress range:NSMakeRange(0, content.length) withTemplate:@"-"]; regularExpretion=[NSRegularExpression regularExpressionWithPattern:@"-{1,}" options:0 error:nil] ;//把多个"-"匹配为一个"-"
content=[regularExpretion stringByReplacingMatchesInString:content options:NSMatchingReportProgress range:NSMakeRange(0, content.length) withTemplate:@"-"]; //根据"-"分割到数组 NSArray *arr=[NSArray array]; content=[NSString stringWithString:content]; arr = [content componentsSeparatedByString:@"-"]; NSMutableArray *marr=[NSMutableArray arrayWithArray:arr]; [marr removeObject:@""]; return marr;