If your spouse/common-law spouse/registered partner/dependent children/dependent parents are not EU citizens, they will need to apply for residence cards, but this can also be done after moving to Sweden, at the same time as you register your right of residence.
The application must be submitted as soon as possible after your family member moved to Sweden and was given a permanent residence permit. The general rule is that it is not possible to get a residence permit if the application is made after a long period of time has passed or if dependency between you has arisen after your family member moved to Sweden.
The person you are going to live with in Sweden must be able to support both of you. He or she must also have a home of sufficient size and standard for you both to live in when you move to Sweden. The requirement concerning financial support and accommodation does not apply to children under 18 years. This means that if you are going to move to your child who lives in Sweden, there is no requirement that your child must be able to provide for you.