How can I flip a label (get the mirror view) in Swift (Xcode 6.3)

If you need a mirror view you should use CGAffineTransformMakeScale:

self.labelShowdata.transform = CGAffineTransformMakeScale(-1., 1);

For Swift 3 based on @Choppin Broccoli's solution:

self.labelShowdata.transform = CGAffineTransform(scaleX: -1, y: 1)

Swift extension to flip vertically or horizontally any UIView:

extension UIView {

    /// Flip view horizontally.
    func flipX() {
        transform = CGAffineTransform(scaleX: -transform.a, y: transform.d)
    }

    /// Flip view vertically.
    func flipY() {
        transform = CGAffineTransform(scaleX: transform.a, y: -transform.d)
    }
 }

Usage: yourView.flipX() or yourView.flipY()

Try this:

self.labelShowdata.transform = CGAffineTransformMakeScale(-1, 1);

Swift 5:

self.table.transform = CGAffineTransform(scaleX: -1, y: 1);