Swift Cell-Height-Animation

Inspired by Facebook UITableview cell animation, which is the "see more" button on the cell that could dynamically change the cell height with animation.

Requirements

• Swift 3
• iOS 8.0+

Demo

Also I added the transition animation when tapped imageView and the algorithm that displays the images on the cell.

Implementation

These two lines are the most important to accomplish the height changing animation effect. (I spent a lot of time reserching, but I never thought the solution will be rather simple)

tableView.beginUpdates()
tableView.endUpdate()

This is also denoted as a side effect of uitableview. With this effect, we could then add animations for these two methods.

UIView.animate(withDuration: 0.7, delay: 0, usingSpringWithDamping: 0.6, initialSpringVelocity: 0.3, animations: {
            self.tableView?.beginUpdates()
            self.tableView?.endUpdates()
        }, 
        completion: nil)

The fixed-height view with higher priority will not get animated, only the one with lowest priority will get animated.

Author

Marvin Zhan, marvinzhanmonster@gmail.com, Wechat : mononster

Currently University of Waterloo undergraduate student.

License

MIT