Question

I have a UIView on which i am loading my image view as a sub view. The image is showing when i doesn’t set the anchor point but whenever i set anchor point the image is not showing .I have added the QUARTZCore frame work also.

I am adding my code below

CGRect apprect=CGRectMake(0, 0, 1024, 768);
UIView *containerView = [[UIView alloc] initWithFrame:apprect1];
containerView.backgroundColor = [UIColor whiteColor];
[self.view addSubview:containerView];

handleView1= [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"large.gif"]];
[handleView1 setAlpha:1];
//[handleView1 setFrame:CGRectMake(390, 172.00, 56.00, 316.00)];
handleView1.userInteractionEnabled = YES;
handleView1.layer.anchorPoint=CGPointMake(490.0, 172.0);
[containerView addSubview:handleView1];

Answer 1

The problem are the values you use for the anchorPoint. You don’t set points like for the position of a frame as values. Let me quote Apple:

The anchorPoint property is a CGPoint
that specifies a location within the
bounds of a layer that corresponds
with the position coordinate. The
anchor point specifies how the bounds
are positioned relative to the
position property, as well as serving
as the point that transforms are
applied around. It is expressed in
the unit coordinate system-the
(0.0,0.0) value is located closest to
the layer’s origin and (1.0,1.0) is
located in the opposite corner.

Have a look at Layer Geometry and Transforms in the Core Animation Programming Guide for more details.