我在
swift中有以下代码,不能编译：
class CustomView: NSView {
override func drawRect(dirtyRect: NSRect) {
var contextPointer: COpaquePointer = NSGraphicsContext.currentContext()!.graphicsPort()
var context: CGContext? = contextPointer as? CGContext
CGContextSetRGBFillColor(context,1,1)
CGContextFillRect(context,CGRectMake(0,100,100))
CGContextFlush(context)
}
}
如何将COpaquePointer转换为CGContext？
