If you want to display it to top left corner,
myNode.position = CGPoint(x: myNode.size.width * 0.5,
y: self.size.height - myNode.size.height * 0.5)
To middle left,
myNode.position = CGPoint(x: myNode.size.width * 0.5,
y: (self.size.height - myNode.size.height) * 0.5);
To bottom left corner,
myNode.position = CGPoint(x: myNode.size.width * 0.5,
y: myNode.size.height * 0.5);
To middle bottom,
myNode.position = CGPoint(x: (self.size.width - myNode.size.width) * 0.5,
y: myNode.size.height * 0.5);
To right bottom corner,
myNode.position = CGPoint(x: (self.size.width - myNode.size.width) * 0.5,
y: myNode.size.height * 0.5);
To middle right,
myNode.position = CGPoint(x: self.size.width - myNode.size.width * 0.5,
y: (self.size.height - myNode.size.height) * 0.5);
To top right,
myNode.position = CGPoint(x: self.size.width - myNode.size.width * 0.5,
y: self.size.height - myNode.size.height * 0.5);
To middle screen,
myNode.position = CGPoint(x: (self.size.width - myNode.size.width) * 0.5,
y: (self.size.height - myNode.size.height) * 0.5);