I updated my Xcode to 6.3 along with Swift 1.2, and I made the transition.
Everything works except dynamic row height for table view. I have those on 3 completely differ
Estimated row height needs to be provided.
It is better not to implement estimatedHeightForRowAtIndexPath:
unless necessary.
estimatedRowHeight
is cheaper provided you can come up with a value
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 30 //Provide any appropriate value