Swift 2&3: How to Use CGBitmapContextCreate

Question

I have the following code:

let ref:CGContextRef = CGBitmapContextCreate(nil , 200, 130, CGImageGetBitsPerComponent(self.CGImage), 0, CGImageGetColorSpace(self.CGImage), CGImageGetBitmapInfo(self.CGImage))

The problem is that I get this error:

Expression does not conform to type 'NilLieralConvertible'

What should I pass in instead of nil for the first argument and why?

Weisbrodt

Answer 1

The problem is the last argument. Make the last argument CGImageGetBitmapInfo(self.CGImage).rawValue.

Cementite

It's because the nature of bitmask types has completely changed in Swift 2.0. And CGBitmapInfo is a bitmask type. – Cementite

Works for Swift 3 too – Wenzel