Sleeping Advice needed

Okay! So we have our little one In her own bed, which is great! She wakes up 1-2 times a night. At night she does fall asleep better but in the day she really fights it! She cry’s and is wingey , we have made the mistake of rocking her but that is due to having to, she’s had a lot of problems and the only way we could stop her crying was rocking her, so now we go to get her to sleep in the day for a nap and she cry’s loads beforehand what should I do?