Why is 'nil' not compatible with 'UnsafePointer<CGAffineTransform>' in Swift 3?

swift swift3 cgpath
cyril picture cyril · Aug 19, 2016 · Viewed 10.4k times · Source

Trying to create a CGMutablePath() as such: 

let path = CGMutablePath()
CGPathMoveToPoint(path, nil, 30, 0)

but the compiler keeps on giving me the following error: 'nil' not compatible with expected argument type 'UnsafePointer<CGAffineTransform>'. What am I doing wrong? I can't seem to find anything else online. (Yes I've tried converting the Ints to CGFloats but it doesn't seem to make a difference.)

Answer

OOPer picture OOPer · Aug 19, 2016

Try this:

let path = CGMutablePath()
path.move(to: CGPoint(x: 30, y: 0))

CGPath APIs are now imported as instance methods in Swift 3. You can check them with Command-clicking on CGMutablePath. Or see the latest reference of CGMutablePath.

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