上次更新日期：
2021年4月29日
The library button is not visible in DPS apps on iPhone with iOS 11 if the app contains folios beyond a certain length.
Environment
Digital Publishing Suite
iOS 11
iPhone
Cause
A change in how iOS handles fonts caused unexpected shifting of user interface elements.
Resolution
Rebuild the app with release 32.6.8. This release, available in the DPS App Builder as of September 28, 2017, resolves the iOS 11 problem with iPhone viewers where the Library back button does not appear due to long publication names.
