iPhone: How do I add layers to UIView's root layer to display an image with the content property?

Question

According to the Mac Dev Center docs, you should be able to set the contents property of a CALayer and have that render automatically. However, I still can\'t get a simple image

Answer 1

You need to create two CALayer . This is perfect way to display the image within the CALayer.

CALayer *pulseLayer_ = [[CALayer layer] retain];

pulseLayer_.backgroundColor = [[UIColor whiteColor] CGColor];
pulseLayer_.bounds = CGRectMake(0., 0., 80., 80.);
pulseLayer_.cornerRadius = 12.;
pulseLayer_.position = self.view.center;

[self.view.layer addSublayer:pulseLayer_];


CALayer *imageLayer = [CALayer layer];

imageLayer.frame = pulseLayer_.bounds;
imageLayer.cornerRadius = 10.0;
imageLayer.contents = (id) [UIImage imageNamed:@"jacklogo.png"].CGImage;
imageLayer.masksToBounds = YES;

[pulseLayer_ addSublayer:imageLayer];

[pulseLayer_ setNeedsDisplay];

I think its make solution to your problem.