Open Radar

 
Summary:
Using an external keyboard, the key command ↑ (up arrow) does not work in certain situations, when used a second time.

Steps to Reproduce:
Steps to Reproduce:
- Run the attached sample project on an iPad Simulator
- Tap into the UITextView on screen
- Place insertion point after "ullamco" (this is important)
- Ensure the External keyboard is connected
- Press ↑ (up arrow)
- Press ↑ (up arrow)


Expected Results:
On the first use of ↑ (up arrow), the cursor jumps to the end of the previous line. On the second invocation, the cursor should jump to the line above.

Actual Results:
On the first use of ↑ (up arrow), the cursor jumps to the end of the previous line. On the second invocation, however, the cursor does not move!

Version:
iOS 9.3.1

Notes:
This issue is always triggered when:

- In a paragraph that is being wrapped to multiple lines
- Placing the cursor in a line that's longer than the line above
- Moving the cursor using the up arrow to the end of the line

The counterpart command ↓ (down arrow) works correctly. There seems to be an issue in UITextInputTokenizer not returning correct positions.

Configuration:
Any iOS device

Attachments:
'textedit v2.zip' was successfully uploaded. http://cl.ly/fk4d