I am trying to figure out the way to convert a given point from the window’s base coordinate system to the screen coordinate system. I mean something like - (NSPoint)convertBaseToScreen:(NSPoint)poin
I\'ve been programming for a while, but just recently decided to start developing for Mac OS X. I feel like I\'ve come to grips with the basics of Objective-C and Cocoa development over the past week.
When I have a UIBezier and I stoke it on a view using drawRect I see the bezier is a a kind of volatile, I mean, it is really not drawn anywhere. Instead it is like it was written in a kind of buffer
I am drawing several UIBezierPaths on a view based on finger movements. Every time a cycle of touches -- Began/Moved/Ended -- completes, I store the points and create a UIBezierPath that is stored in
I am trying to draw a rectangle and let the user create it based on where he clicks and where he drags the mouse.
I have a UIView class that I am using to have a CALayer. This layer will be used to draw lines, based on touch.
I\'ve a got a loop running at a separate thread updating the location and rotation of stuff, it runs at more than enough FPS and calls setNeedsDisplay on the main thread in t开发者_Python百科he end. T
I\'m trying to write a finger painting type app.I am starting a path in touchesBegan and adding to that path in touchesMoved.In touchesMoved, I use the following code:
So I read here on SO that I can encode a CGLayerRef to a NSValue using NSValue *myCopy = [[NSValue all开发者_C百科oc] initWithBytes:&myLayer objCType:@encode(CGLayerRef)];
I\'m trying to build some iOS apps while learning and am having some trouble understanding the proper way to do this.
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