Question

im writing a video recorder application for mac with cocoa, and have a huge problem with memory usage.

When launching the app, i have a window with two buttons that i can change view with and a simple custom view where the webcam get loaded. Just this view takes 21mb of ram, when i press on one of the buttons i change the custom view to a QTMovie of the content recorded from the cam.

Every time i change view my app fills upp with about 10mb of ram, and never stops. I have garbage collection on. Even if I show the view of the QTMovie and wants to press the button to display it again, its takes more ram.

Code that loads the subview, trigged from the button

 if ([myCurrentViewController view] != nil)
    [[myCurrentViewController view] removeFromSuperview];



        NSViewController* cameraViewController2 = [[NSViewController alloc] initWithNibName:@"kVideo" bundle:nil];
        if (cameraViewController2 != nil)
        {
            myCurrentViewController = cameraViewController2;    
        }


[myTargetView addSubview: [myCurrentViewController view]];

And this is what happens when the the videoView loads, and this takes 10mb of ram every time i want it to display.

-(void)playMovie
{

[movieView setMovie:nil];

NSString* moviePath = [NSBundle pathForResource:@"tempFile" ofType:@"mov" inDirectory:@"/Users/Shared/"];
QTMovie* movie = [[QTMovie alloc] initWithFile:moviePath error:nil];


[movieView setMovie:movie]; 

}

- (void)awakeFromNib
{    

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveEvent3:) name:@"updateVideoPlayer" object:nil];

[self playMovie];
}

Answer 1

Okay i solved it, every time i pressed a button to change a view, i allocated the new view with something like this SViewController* cameraViewController2 = [[NSViewController alloc] initWithNibName:@"kVideo" bundle:nil];, and they never got released or thrown away or whatever they should do. Now instead i allocate my views in one place, and just refer to the allocated views when i press new buttons.