Firebase多位置更新最佳实践（包括样本）ios

Im pretty new to Firebase and as i can see their features im loving it so far. I plan to continue using it on the future, but i want to use the best practices possible so I am trying to make a multi location update in Firebase, I made it working in two ways, but i want to make sure which one is the right way, best way and i want to know why.Im pretty new to Firebase and as i can see thei