Formal:
* Ek het dit regtig geniet om jou te ontmoet. (This is the most literal translation and quite formal.)
* Dit was 'n plesier om jou te ontmoet. (This is a bit less formal and means "It was a pleasure to meet you.")
Informal:
* Ek het dit baie geniet om jou te ontmoet. (This is a more casual way to say it.)
* Dis lekker om jou te ontmoet. (This is a very informal and friendly way to say it.)
* Lekker om jou te ken. (This means "Nice to meet you" and is very informal.)
You can also add a specific detail to make the phrase more personal:
* Ek het baie van ons gesprek gehou. (I enjoyed our conversation.)
* Dit was lekker om meer van jou te leer. (It was nice to learn more about you.)
Ultimately, the best way to say it will depend on the situation and your relationship with the person.