Question

I want to know how to make an analog clock in iPhone SDK. However, I want the hands of the clock to be custom images and not squares drawn over like in this tutorial: http://iphone-dev-tips.alterplay.com/2010/03/analog-clock-using-quartz-core.html

The problem with that tutorial is that the clock hands are drawn with Quarzt Core. I’m okay with that as long as the hands could be custom. What would be the easiest way to make an Analog Clock this way?

Answer 1

Do it with CALayers. is WAY much easier and performance is better this way.

CALayer *handLayer = [CALayer layer];
handLayer.contents = (id)[UIImage imageNamed:@"hand.png"].CGImage;
handLayer.anchorPoint = CGPointMake(0.5,0.0)];
[myview.layer addSublayer:handLayer];

//i.e.: if handLayer represents the seconds hand then repeat this every second ;)
handLayer.transform = CGAffineTransformMakeRotation (angle); //set the angle here

UPDATE:

I wrote a ClockView sample using CALayers, maybe you find it useful.