let starbar = DZStarBar.starBarAt(CGPoint(x: 20, y: 50), Height: 40, StarCount: 5);
starbar.currentValue = 1;

starbar.displayOnly = false;    // true: display only, false: can change value
starbar.addTarget(self, action: #selector(ViewController.onStarBarChanged), for: UIControlEvents.valueChanged); // will only work when displayOnly is false

starbar.canHalf = true; // display half star or not

self.view.addSubview(starbar);