Question

I am having memory warning with my app then it crashes. The error, I think is on my draw-on-touch feature, because when I tried to run it with the alloc instrument the memory starts increasing when i keep on moving my finger on the screen.

Here’s my code.

    touchSwiped = YES;

    UITouch *touch = [touches anyObject];

    previousPoint2 = previousPoint1;
    previousPoint1 = currentTouch;
    currentTouch = [touch locationInView:self.view];

    CGPoint mid1 = midPoint(previousPoint2, previousPoint1); 
    CGPoint mid2 = midPoint(currentTouch, previousPoint1);

    UIGraphicsBeginImageContext(CGSizeMake(480 , 320));
    [drawView.image drawInRect:CGRectMake(0, 0, 480,320)];  

    CGContextRef context = UIGraphicsGetCurrentContext();    

    CGContextSetLineCap(context,kCGLineCapRound);
    CGContextSetLineWidth(context, inkWidth);
    CGContextSetBlendMode(context, blendMode);
    CGContextSetRGBStrokeColor(context,redColor, greenColor, blueColor, 1);
    CGContextBeginPath(context);
    CGContextMoveToPoint(context, mid1.x, mid1.y);
    CGContextAddQuadCurveToPoint(context, previousPoint1.x, previousPoint1.y, mid2.x, mid2.y);
    CGContextStrokePath(context);

    drawView.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsGetCurrentContext();

Answer 1

I did what Ohr’s said on his comment and it worked for me.

I released the CGContextRef like this CGContextRelease(context);