Open Radar

 
Summary:
This bug is seen on iOS 10.x (10.0.x and 10.1.x)

I have a tableview which expand cells when they are selected. To do so I track the selected cells and I call the `beginUpdates`/`endUpdates` methods inside an UIView animation block. The cell heights are given by the `heightForRowAt` delegate method.

Doing this animate properly the cell's frame, but the contentView's frame jumps immediately to the new position. There is no animation.

Steps to Reproduce:
In an XCode 8 project:

1. Create a table view
2. Add a view to one of the cells with edge constraints (or with autoresizing masks)
3. Animate the cell height change with beginUpdates/EndUpdates

Expected Results:
Cell, content view, and subview all animate the height change together.

Actual Results:
On iOS 10.x, the cell and subview are animated. The content view immediately jumps to the end position.

Version:
XCode 8.x / iOS 10.x

Notes:
With the given project example, run the TableViewCellHeightAnimation scheme with an iOS 10.x device or simulator and select a cell.

You should see the subview jumps directly to its end position.

Configuration:
iOS 10.x simulators and devices

Attachments:
'TableViewCellHeightAnimation.zip' was successfully uploaded.