利用if、else if、else製作拍立得App_Week07

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var mickyImageView: UIImageView!

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view.

}

@IBAction func ratioValueChange(_ sender: UISegmentedControl) {

let width:CGFloat=250

var height:CGFloat=0

if sender.selectedSegmentIndex==0{height=width}

else if sender.selectedSegmentIndex==1{height=width/3*4}

else {height=width/9*16}

mickyImageView.frame=CGRect(x: 83, y: 118, width: width, height: height)

}

@IBAction func ratioButtomTapped(_ sender: UIButton) {

let width: CGFloat=250

var height:CGFloat=0

if sender.currentTitle==”1:1"{sender.setTitle(“3:4”, for: UIControl.State.normal)

height=width/3*4

}

else if sender.currentTitle==”3:4"{sender.setTitle(“16:9”, for: UIControl.State.normal)

height=width/9*16

}

else {sender.setTitle(“1:1”, for: UIControl.State.normal)

height=width

}

mickyImageView.frame=CGRect(x: 83, y: 118, width: width, height: height)

}

}