memory issues since iOS 11 or iOS 10.3

https://i.stack.imgur.com/3eErW.jpg

Edit: Today I again experience a strange behaviour with the iOS 11 Golden Master. Yesterday Afternoon at around 16:30 I arrived home. The IFTTT didenterregion was not triggered. Or at least I did not get the notification. When I left home this morning I got the exit notification but at the same time the enter from yesterday. So I´m suspecting some general change in the memory allocation iOS 11 has when apps run in the background.

I did some further investiagation.. So I implemented the method applicationDidReceiveMemoryWarning and displayed this waring to my beta testers.

Here´s my code:

func applicationDidReceiveMemoryWarning(_ application: UIApplication) {
      
        let memoryinuse = report_memory()
      
        let notification = UILocalNotification()
        notification.alertBody = "MemoryWarning. Memory in use: \(memoryinuse)"
        notification.soundName = "Default"
        UIApplication.shared.presentLocalNotificationNow(notification)
      
        print("MemoryWarning. Memory in use: \(memoryinuse)")
      
    }

To see how much memory the application is using I have this function:

func report_memory() -> String {
        var taskInfo = mach_task_basic_info()
        var count = mach_msg_type_number_t(MemoryLayout<mach_task_basic_info>.size)/4
        let kerr: kern_return_t = withUnsafeMutablePointer(to: &taskInfo) {
            $0.withMemoryRebound(to: integer_t.self, capacity: 1) {
                task_info(mach_task_self_, task_flavor_t(MACH_TASK_BASIC_INFO), $0, &count)
            }
        }
       
        if kerr == KERN_SUCCESS {
            print("Memory used in bytes: \(taskInfo.resident_size)")
        }
        else {
            print("Error with task_info(): " +
                (String(cString: mach_error_string(kerr), encoding: String.Encoding.ascii) ?? "unknown error"))
            return "error"
        }
       
        let mbinuse = taskInfo.resident_size / 1000000
       
        return String(mbinuse) + " MB"
    }

I got the first feedbacks from users. The get this memory waringing frequently with something between 7 and 18MB reported from function report_memory().

So i´m scratching my head if either my code is wrong and the memory in use is not reported correctly or if really it´s possible for an iPhone 6 or 7 to report a memory warning when the app is using 7MB while being active in the background (while entering a geofence or a beacon region).

Many Thanks

Stephan

Yeah there is definitely something up with iOS 11 and memory management. I haven’t dug into the code yet of any of my iPad apps but have noticed bluetooth dropping to background apps (Merc bluetooth device), missed phone calls (hard to believe but true), ring fencing gps apps just not alerting me and even WhatsApp not displaying notifications on received messages. The background Bluetooth activity is nuts, I can replicate this by opening and using my phone with different apps and the Bluetooth drops everytime after about 5-6 apps used. Worked flawlessly in iOS 10.x Not to rant, but iOS 11 is extremely buggy on an iPhone 6. I was part of the beta and noticed reported bugs were just ignored or follow ups from “Apple” employees were poor and they never understood the issue.

I got this issue in 17.0 or above version. if any one can help me thanks in advance.

I got this issue in 17.0 or above version. if any one can help me thanks in advance.