iOS开发 判断是否为有效网址

- (BOOL)achiveStringWithWeb:(NSString *)infor

{

NSString *emailRegex = @"[a-zA-z]+://.*";

NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];

return [emailTest evaluateWithObject:infor];

}