If you have just become unemployed, you may be tempted to use your credit cards more often to continue to make necessary payments. If you do not have sufficient savings this may be your only option, but remember that you will eventually have to repay everything you buy. So in times of unemployment make sure to cut back your expenses to the bare minimum to ensure you do not damage your financial future by accumulating large balances on your cards. If you have some savings then use them to make your necessary payments and try not to use your credit cards at all, unemployment is not the time to be buying on credit if you don't need to.
If you are worried about potentially becoming unemployed in the near future, you should be managing your cards differently. You should be minimising the amount you are purchasing on credit, and you should be trying to save any money you can in case the worst happens and you lose your job. If unemployment is a possibility, you should be managing every aspect of your finances to reduce your spending and save more money so you can hold out until you get another job. If you are worried about losing your job, and think you may need to live off credit for a while if it happens, then you should get a new credit card now before its to late as it can be difficult to get a new card once you're unemployed.
If you are currently unemployed you are still able to get a credit card, but it may be unwise to do so. The cards you will be accepted for will all have a very high interest rate, high annual fee and a low credit limit, so it can cost you a lot of money to use. Try to hold off on applying for any cards while you are unemployed, simply waiting until you have another job will dramatically improve the interest rates you will get on a new card.
Don't make your finances worse be using your cards inappropriately. Follow some of this advice and manage your credit well, regardless of whether you have a job or are unemployed.
Thank you for reading and good luck!