macOS How to repeat NSView's -drawRect method? (noob)

[rerelease]

I'm trying to build my first graphical app that utilizes NSRects and NSPoints to draw a very basic clock into a custom MyView.

Thus far the result looks like this:

However, the clock is static and as such not very impressive. How could I make my custom NSView object call the -drawRect method repeatedly (every once a second)? Is there any easy way to do it?

Keep in mind that I have very little idea of what I'm doing and the code is really basic so baby steps would be useful. 🙂

Thanks for your help!

 

[kainjow]

You can use NSTimer. In your custom view somewhere, create it like so:

[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(redraw) userInfo:nil repeats:YES];

Then setup the timer's action method to redraw the view:

- (void)redraw
{
    [self setNeedsDisplay:YES];
}

 

[rerelease]

Looks excellent, thanks a lot. 🙂