清除MKSnap热内存

Question

我目前正在使用MKSnapshotter，但我注意到（类似于MKMapView）它占用了大量内存，并且在应用程序期间从未释放过它。我试过释放内存，但没有用：

-(void)viewWillDisappear:(BOOL)animated{
[super viewWillDisappear:animated];
[self releaseMKMapSnapshotMem];
}
-(void)releaseMKMapSnapshotMem{
    self.snapshotter=nil;//MKSnapShotter
    self.options=nil;//MKSnapShotterOptions
 }

非常感谢您的帮助。

更新包括更多细节

MKMapSnapshotOptions * snapOptions= [[MKMapSnapshotOptions alloc] init];
        self.options=snapOptions;
        CLLocation * salonLocation = [[CLLocation alloc] initWithLatitude:self.lat longitude:self.long];
        MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(location.coordinate, 300, 300);
        self.options.region = region;
        self.options.size = self.view.frame.size;
        self.options.scale = [[UIScreen mainScreen] scale];
        MKMapSnapshotter * mapSnapShot = [[MKMapSnapshotter alloc] initWithOptions:self.options];
        self.snapshotter =mapSnapShot;
        [self.snapshotter startWithCompletionHandler:^(MKMapSnapshot *snapshot, NSError *error) {
            if (error) {
                NSLog(@"[Error] %@", error);
                return;
            }
            UIImage *image = snapshot.image;
            self.mapImage = image;
            NSData *data = UIImagePNGRepresentation(image);
            [self saveMapDataToCache:data WithKey:mapName];

        }];

Answer 1

试试这个：

    MKMapSnapshotOptions * snapOptions= [[MKMapSnapshotOptions alloc] init];
    CLLocation * salonLocation = [[CLLocation alloc] initWithLatitude:self.lat longitude:self.long];
    //location.coordinate or salonLocation.coordinate below????
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(location.coordinate, 300, 300);
    snapOptions.region = region;
    snapOptions.size = self.view.frame.size;
    snapOptions.scale = [[UIScreen mainScreen] scale];
    MKMapSnapshotter * mapSnapShot = [[MKMapSnapshotter alloc] initWithOptions: snapOptions];
    [mapSnapShot startWithCompletionHandler:^(MKMapSnapshot *snapshot, NSError *error) {
        if (error) {
            NSLog(@"[Error] %@", error);
            return;
        }
        UIImage *image = snapshot.image;
        NSData *data = UIImagePNGRepresentation(image);
        [self saveMapDataToCache:data WithKey:mapName];
    }];

我做的和你做的差不多，只有两个区别：

    options.region = _mapView.region;
    options.size = _mapView.frame.size;

my_mapView是显示在视图控制器中的地图。。。