iOS 判断邮箱，手机号码，密码组合

是否是正确的邮箱格式

+ (BOOL)isValidateEmail:(NSString *)email
{
    NSString *regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    return [predicate evaluateWithObject:email];
}

是否是正确的手机号码格式

+ (BOOL)isValidateMobile:(NSString *)mobile
{
    NSString *regex = @"^((13[0-9])|(14[5,7])|(15[^4,\\D])|(18[0,0-9])|(17[0,5-8]))\\d{8}$";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
    return [predicate evaluateWithObject:mobile];
}

正则匹配用户密码6-18位数字和字母组合

+ (BOOL)checkPassword:(NSString *) password
{
    // 正则匹配用户密码6-18位数字和字母组合
    NSString *pattern = @"^(?![0-9]+$)(?![a-zA-Z]+$)[a-zA-Z0-9]{6,18}";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:password];
    return isMatch;
    
}