Can I draw shapes like circle, rectangle, line etc outside drawRect method using CGContextRef contextRef = UIGraphicsGetCurrentContext(); or is it mandatory to use it inside drawRect only. Pleas...

I am drawing a line graph by using CGContextRef. Can I zoom in zoom out this graph to show lines clearly. I am using this code. CGContextRef context=UIGraphicsGetCurrentContext(); CGContextBeginP...

I've created a context using CGBitmapContextCreate. Do I need to release it using CGContextRelease? I know the answer is yes in Objective-C, but how about in Swift? Thanks!

So, I am taking a screenshot of a subclassed UIView that I save into the device's photo stream. Problem: The problem is that I use resizableImageWithCapInsets to add a stretched background to my UI...

How can i strore all pixel point in the CGContextAddArc To NSMutableArray.or CGContextRef to NSMutable Array static inline float radians(double degrees) { return degrees * PI / 180; } - (void)d...

I have issue to implement "Emboss/Shadow effects" in my drawing. Finger paint functionality is currently working fine with my custom UIView and below is my drawRect method code: Edit code with all...

I have created a custom UIView (without .xib) for a finger paint application. Paint is working fine with custom UIView but my problem is that when I try to erase the painted path I am getting: ...