问题 I am using the new iOS13 background task framework, with the implementation of a BGAppRefreshTask type. My problem is, my device is never calling the task, even after waiting several hours, but I am able to successfully run the code using the Debugger trick of calling _simulateLaunchForTaskWithIdentifier. I have setup the following: Enabled my app with the Background Modes capability, a checking the "Background fetch". Added my background Id to Info.plist under "Permitted background task