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lionheart / openradar-mirror

A mirror of radars pulled from http://openradar.me/.
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51354116: Calling addMotionEffect on image view causes "API called on a background thread: -[UIApplication applicationState]" warning #21296

Open openradar-mirror opened 5 years ago

openradar-mirror commented 5 years ago

Description

Area: Core Motion

Adding a motion effect to UIImageView causes a UI warning that application state was used on a background thread (by CoreMotion)

Steps to Reproduce: Call addMotionEffect on UIImageView on main thread.

Expected Results: No warning

Actual Results: Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] PID: 15886, TID: 4224621, Thread name: com.apple.CoreMotion.MotionThread, Queue name: com.apple.root.default-qos.overcommit, QoS: 0 Backtrace: 4 libobjc.A.dylib 0x00000001b021b6f4 + 56 5 CoreMotion 0x00000001b6965638 CoreMotion + 292408 6 CoreMotion 0x00000001b6965b68 CoreMotion + 293736 7 CoreMotion 0x00000001b6965a78 CoreMotion + 293496 8 CoreMotion 0x00000001b69938a8 CoreMotion + 481448 9 CoreMotion 0x00000001b69938ec CoreMotion + 481516 10 CoreFoundation 0x00000001b0fa778c + 28 11 CoreFoundation 0x00000001b0fa7074 + 276 12 CoreFoundation 0x00000001b0fa2368 + 2276 13 CoreFoundation 0x00000001b0fa1764 CFRunLoopRunSpecific + 452 14 CoreFoundation 0x00000001b0fa2498 CFRunLoopRun + 84 15 CoreMotion 0x00000001b6993280 CoreMotion + 479872 16 libsystem_pthread.dylib 0x00000001b0c21920 + 132 17 libsystem_pthread.dylib 0x00000001b0c2187c _pthread_start + 48 18 libsystem_pthread.dylib 0x00000001b0c29dcc thread_start + 4

Version/Build: iOS 12.2 – iPhone Xs

- Product Version: 12.0 Created: 2019-06-03T13:18:47.487446 Originated: 2019-03-06T00:00:00 Open Radar Link: http://www.openradar.me/51354116