编辑:这似乎已经在iOS 13上得到解决,以下是所有原始细节。
当我实例化用于核心运动的CMMotionManager对象时,我的应用程序崩溃了。这是在运行iOS 12.0.1的iPhone Xs上发生的。
我可以使用以下视图控制器可靠地重现此问题。
import UIKit
import CoreMotion
class ViewController: UIViewController {
var motion: CMMotionManager?
override func viewDidLoad() {
super.viewDidLoad()
// This causes a crash on iPhone Xs, iOS 12.0.1
self.motion = CMMotionManager()
}
}
完整的示例项目在https://github.com/doctorcolinsmith/motiontestcrash/tree/master。运行以上代码时,我在调试器中遇到了一个线程故障,以下是输出内容。=================================================================
Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState]
PID: 3634, TID: 630341, Thread name: com.apple.CoreMotion.MotionThread, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4 libobjc.A.dylib 0x000000019b0d3894 <redacted> + 56
5 CoreMotion 0x00000001a19337a4 CoreMotion + 305060
6 CoreMotion 0x00000001a1933cd8 CoreMotion + 306392
7 CoreMotion 0x00000001a1933be8 CoreMotion + 306152
8 CoreMotion 0x00000001a19653cc CoreMotion + 508876
9 CoreMotion 0x00000001a196542c CoreMotion + 508972
10 CoreFoundation 0x000000019be6c888 <redacted> + 28
11 CoreFoundation 0x000000019be6c16c <redacted> + 276
12 CoreFoundation 0x000000019be67470 <redacted> + 2324
13 CoreFoundation 0x000000019be66844 CFRunLoopRunSpecific + 452
14 CoreFoundation 0x000000019be675a8 CFRunLoopRun + 84
15 CoreMotion 0x00000001a1964d64 CoreMotion + 507236
16 libsystem_pthread.dylib 0x000000019bae1a04 <redacted> + 132
17 libsystem_pthread.dylib 0x000000019bae1960 _pthread_start + 52
18 libsystem_pthread.dylib 0x000000019bae9df4 thread_start + 4
2018-10-24 16:19:31.423680-0700 motiontest[3634:630341] [reports] Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState]
PID: 3634, TID: 630341, Thread name: com.apple.CoreMotion.MotionThread, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4 libobjc.A.dylib 0x000000019b0d3894 <redacted> + 56
5 CoreMotion 0x00000001a19337a4 CoreMotion + 305060
6 CoreMotion 0x00000001a1933cd8 CoreMotion + 306392
7 CoreMotion 0x00000001a1933be8 CoreMotion + 306152
8 CoreMotion 0x00000001a19653cc CoreMotion + 508876
9 CoreMotion 0x00000001a196542c CoreMotion + 508972
10 CoreFoundation 0x000000019be6c888 <redacted> + 28
11 CoreFoundation 0x000000019be6c16c <redacted> + 276
12 CoreFoundation 0x000000019be67470 <redacted> + 2324
13 CoreFoundation 0x000000019be66844 CFRunLoopRunSpecific + 452
14 CoreFoundation 0x000000019be675a8 CFRunLoopRun + 84
15 CoreMotion 0x00000001a1964d64 CoreMotion + 507236
16 libsystem_pthread.dylib 0x000000019bae1a04 <redacted> + 132
17 libsystem_pthread.dylib 0x000000019bae1960 _pthread_start + 52
18 libsystem_pthread.dylib 0x000000019bae9df4 thread_start + 4
(lldb)
有人以前遇到过这个问题或者有解决崩溃的想法吗?