Question

Is it possible to draw multiple NSImages in a single NSView?

So far drawing in an NSView subclass is done like so:

- (void)drawRect:(NSRect)dirtyRect
{
    [image drawInRect:NSMakeRect(0.0f, 0.0f, 100.0f, 100.0f) fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0f];
}

//to change the current image
- (void)newImage:(NSImage *)image_
{
     [image release];
     image = [image_ retain];
     [self setNeedsDisplay:YES];
}

But this is for drawing just one image. Can anyone please help out?
Thanks.

Answer 1

You have to keep references to the images you need to draw.

@interface MyView : NSView
{
    NSMutableArray* images;
}

Then, add the images with a suitable API, for example:

@implementation MyView

- (void) addImage: (NSImage *) anImage
{
    [images addObject: anImage];
    [self setNeedsDisplay: YES];
}

In drawRect: you can iterate through the images and draw all/some of them.