The visual debugger fails because of an assertion in UIKit's UITextView when auto layout is not used
Originator: | steipete | ||
Number: | rdar://25311044 | Date Originated: | 23-Mar-2016 10:12 AM |
Status: | Closed | Resolved: | |
Product: | Developer Tools | Product Version: | 9.3 |
Classification: | Other Bug | Reproducible: | Always |
Summary: The visual debugger fails because of an assertion in UIKit's UITextView when auto layout is not used. Steps to Reproduce: Run sample in Xcode 7.3. Select view debugger. Observe assertion in the log and no working view debugger. 2016-03-23 10:05:17.963 AutoLayoutViewDebuggingIssue[83786:1782898] *** Assertion failure in -[UITextView _firstBaselineOffsetFromTop], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3512.60.7/UITextView.m:1683 Expected Results: View debugger should work. Nothing should throw up in the log. Actual Results: Sadness. No view debugger. Me going back to Reveal, then getting curious and spending an hour on this radar :) Regression: This used to work, could be a regression in Xcode 7.3 OR in UIKit 9.3? I’ve checked my decompiles for UIKit and it doesn’t seem like it’s a recent UIKit change, so pretty sure it’s a recent Xcode change instead. Notes: See my workaround in ViewController.m via adding useless constraints to satisfy the check in the method that asserts. Rather not do that but don’t see another way.
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Fixed in iOS 10b1/Xcode 8b1
Not fixed in Xcode 7.3.1 GM Seed.
Workaround from steipete is:
Sample: http://cl.ly/3H473S0w3s2q