Rather than using a normal button, I subclassed a UIControl because I needed to add a gradient to it. I also have a way to add a shadow and an activit ...

I am trying to move a sub-area contents within a CGLayer. The main idea is that I first draw the source area (the part I want to move) into a newly cr ...

I am working on a timeline view. I am drawing a line in the centre of my icon and drawing a circle with fill colour. But the problem is that when I dr ...

I want to create a ImageView Object , But ，when I use contentRect property to create , the result have any shadow , help me . Look this code : And ...

What is the difference between CGLayer, CALayer and CGContext? ...

I'm working on a drawing app, where user should be able to both fill locked areas and simply draw lines on finger moves. Locked areas are provided as ...

My Mac OSX application has a background process that uses Core Graphics to draw 2D lines and areas into a CGLayer. This is then periodically displayed ...

I have been scratching my hair for this question for several days. Basically, the problem is: I have a square button(equal width and height), with a ...

I am trying to re-implement something similar to the Apple Watch Friend Picker. I have two UIViews, both with a corner radius of half their height so ...

I'm trying to add AVPlayerLayer to UIView This is the video's container (in blue): Constraints: Final result: I can't figure out why video i ...

I'd like to draw objects to two separate CGLayers from within the same for loop, but am unsure how to do this. For example, I'd like to draw three or ...

I need QuartzCore.framework to add borderColor to a textfield, how? ...

I’m changing the background colour of a UIButton via this category method, using a 1px by 1px image: However, this overrides my setting of the .lay ...

What would be the optimal way to render a large number of paths < 512 in a view's drawRect? I would like to draw up to 512, 2 pixel wide segments ...

I am working CGlayers for drawing. I have implemented the drawing part, the drawingView(canvas) where the user will draw is dynamic, what I mean by th ...

I am working on a drawing application, I am using CGlayers for drawing, So I open my canvas for drawing on click of a button, I am using UIBezierPath ...

I am working with CGlayer drawing, I am using 3 CGlayers for drawing, named as temporary, permanent and newLayer. 1) While drawing, I draw first into ...

I am drawing into CGlayers, So I am creating the Layer and drawing the Layer into graphics context in drawRect method, this way I do all the drawin ...

I am using CGlayers for drawing, as the documentation says, it's more efficient way to render drawing on canvas. I basically draw into CGlayers and t ...

I've written an iOS app in which I'm using CGLayer quite successfully. While researching ways to squeeze a bit more performance out of this app, I cam ...