I need to draw a series of PNGs into a CGContext so I can blend them together: CGContextRef context = UIGraphicsGetCurrentContext();
I have a monochrome image with 256 levels of grayscale. I want to map each level to a specific color and apply to the image to get a colored image as a result. How can I do it?
How would I change from one view to another w开发者_如何转开发ith a slide transition? Thanks.Place them side by side, and use NSViewAnimation to perform the animation.
I am using core-plot lib to draw bar charts in my app like this My problem is that i want the enabling of grapgh mo开发者_如何学运维vement only in horizontal direction so that I can see the records
I wonder if开发者_如何学Python someone can distinguish precisely between these? For my understanding, Core Graphics is just a \"Framework Package\" which contains Quartz Core and Quartz 2D. But I\'m n
I have a mask (loaded from a 256 grey PNG) that I want to apply to an image that\'s being used as part of my process for drawing a UITableViewCell\'s imageView.image property.
I have not really done much programming with Core Graphics. And I tend to stick with QuartzCore now that it does a lot of what I need through the layer property :)
this is the code in the continuation of this question....Allow horizontal scrolling only in the core-plot barchart?
I approaching core animation and drawing empirically. I am trying to animate a simple shape; the shape in question is formed by 3 lines plus a bezier curve. A red line is also drawn, to show the curve
Actually, almost exactly the same thing. A matrix o开发者_如何学JAVAf small views that would expand out when you click on them. I don\'t know if it makes more sense to take a snapshot of the view as a
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