iOS Need help overcoming memory issue

Question

I have recently ran into a problem where my MapView appears to be using more memory than it should. I have disabled all my methods that are populating the annotations and downloading data etc and leaving the app just to the map view essentially. The map view is initialized and allocation in a singleton object called Map Manager that I use through the map because I use the map in multiple views. All the map handling methods reside in this object as well. When running my app, zooming, sculling, panning etc is very choppy and sluggish. I am running the newest iPad Mini.

When running the app on iOS7, within xCode the the memory utilization reports spikes at ~ 180MB of memory. If I run the app, then open Apple Maps at the same time and play around with it, I have caused my app to crash due to error: Terminated due to Memory Pressure.

Below is my map initializer and instruments profile while running the Allocations test:

+ (id)sharedInstance
{
    static LBMapManager *mapManager = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{

        // Intialize the class
        mapManager = [[self alloc] init];

        // Intialize map
        mapManager.mapView = [[MKMapView alloc] init];
        mapManager.mapView.mapType = [[LBSettings getObjectForKey:kLBSettingsMapType] intValue];
        mapManager.mapView.showsBuildings = YES;
        mapManager.mapView.showsPointsOfInterest = YES;
        mapManager.mapView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    });
    return mapManager;
}

Photo:

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That was within Xcode where you can look at CPU utilization and memory — Jon Erickson, Nov 03 '13 at 06:44
Can you duplicate it on Instruments? Or get to 100+ at least? — Khaled Barazi, Nov 03 '13 at 07:00
@Spectravideo328 , in Instruments, which column reflects how much memory I am using? — Jon Erickson, Nov 03 '13 at 14:27
Please see my detailed response here regarding which column to use: http://stackoverflow.com/questions/19129881/ios-constantly-growing-memory-usage/19129946#19129946 — Khaled Barazi, Nov 03 '13 at 14:39
Awesome thanks. After following the answer below, my performance increased exponentially. I am still sub ~30MB which is good using maps. — Jon Erickson, Nov 03 '13 at 17:34

score 2 · Accepted Answer · answered Nov 03 '13 at 09:34

2

May it happen that you have NSZombies enabled?

enter image description here

You should disable this option anytime you are checking a memory issue, because it keeps in memory all objects ever created, thus causing memory issues.

answered Nov 03 '13 at 09:34

imihaly

1,838
13
11

I think that was it. I also had Malloc Stack enabled. I disabled them both am I am receiving way better performance! Thanks! – Jon Erickson Nov 03 '13 at 14:30

iOS Need help overcoming memory issue

1 Answers1