UITextField text goes down when editing, in iOS 10

Originator:onevcat
Number:rdar://28751703 Date Originated:13-Oct-2016
Status:Open Resolved:No
Product:iOS Product Version:iOS 10
Classification:UIKit Reproducible:Always
 
Summary:
The text of a UITextField will go down when beginning editing, when using .None as the border style.

Steps to Reproduce:
See this post:

http://stackoverflow.com/questions/39556087/uitextfield-chinese-character-moves-down-when-editing-in-ios-10

Expected Results:
The text in correct position (without moving) when editing.

Actual Results:
The text will go down with an offset.

Version:
iOS 10

Notes:
With iOS 10 SDK. And this does not happen in iOS 8 and 9.

Configuration:
iPhones

Attachments:
https://gyazo.com/e5695053562fb8c816129ce8c8e998b5

Comments

It is said to be duplicated to 28258416


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!