ios —— 之不能输入汉字和特殊字符的 的密码

+ (BOOL)validatePwd:(NSString *)param

{

NSString *pwdRegex = @"^[a-zA-Z0-9]+$";

NSPredicate *pwdPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",pwdRegex];

return [pwdPredicate evaluateWithObject:param];

}