AdMob Ads - Main Thread Checker error in log

Question

I just added AdMob into my UIViewController , and when I run the app, it freezes for a few seconds, and then this shows up:

=================================================================
Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState]
PID: 8093, TID: 1911410, Thread name: com.apple.CoreMotion.MotionThread, Queue name: com.apple.root.default-qos.overcommit, QoS: 0
Backtrace:
4   libobjc.A.dylib                     0x0000000198a9b894 <redacted> + 56
5   CoreMotion                          0x000000019f321040 CoreMotion + 307264
6   CoreMotion                          0x000000019f321574 CoreMotion + 308596
7   CoreMotion                          0x000000019f321484 CoreMotion + 308356
8   CoreMotion                          0x000000019f352c64 CoreMotion + 511076
9   CoreMotion                          0x000000019f352cc4 CoreMotion + 511172
10  CoreFoundation                      0x00000001998324fc <redacted> + 28
11  CoreFoundation                      0x0000000199831de0 <redacted> + 276
12  CoreFoundation                      0x000000019982d0e4 <redacted> + 2324
13  CoreFoundation                      0x000000019982c4b8 CFRunLoopRunSpecific + 452
14  CoreFoundation                      0x000000019982d21c CFRunLoopRun + 84
15  CoreMotion                          0x000000019f3525fc CoreMotion + 509436
16  libsystem_pthread.dylib             0x00000001994a7974 <redacted> + 132
17  libsystem_pthread.dylib             0x00000001994a78d0 _pthread_start + 52
18  libsystem_pthread.dylib             0x00000001994afddc thread_start + 4

Any tips?

Answer 1

• Your problem is this process is in the Main Thread . Main Thread for only UI action. Otherwise UI will freeze.

• You should do it in background thread.

  DispatchQueue.global(qos: .background).async { // Your code }

Enjoy.