摘要： NSString *zhengze=@"^([a-z0-9]+\\.?(?:com|cn|mobi|co|net|so|org|gov|tel|tv|biz|cc|hk|name|info|asia|me)?(?:\\.?(?:cn))?)$"; NSPredicate *pre=[NSPredicatepredicateWithFormat:@"SELF MATCHES %@",zhengze]; if (![pre evaluateWithObject:searchText.text]) { UIAlertView *alert = [[UIAler 阅读全文