Swift 피커 뷰 사용해서 원하는 항목 선택하기

 

특정 이미지들을 파일 경로에 추가해준다.

images/ 이미지들 

 

특정 메서드들을 이용하기 위해

UIPickerViewDelegate, UIPickerViewDataSource 를 상속해 준다

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    let MAX_ARRAY_NUM = 10
    let PICKER_VIEW_COLUMN = 1
    let PICKER_VIEW_HEIGHT:CGFloat = 80
    var imageArray = [UIImage?]()
    var imageFileName = [ "1.jpg", "2.jpg", "3.jpg", "4.jpg", "5.jpg",
                          "6.jpg", "7.jpg", "8.jpg", "9.jpg", "10.jpg" ]

    @IBOutlet var pickerImage: UIPickerView!
    @IBOutlet var lblImageFileName: UILabel!
    @IBOutlet var imageView: UIImageView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

		// 뷰가 로드 될떄 MAX_ARRAY_NUM 개수만큼 imageFileName에 있는 이미지를 할당항
        // 처음 로드될때 0번쨰 배열에 있는 이미지를 넣어준다.
        for i in 0 ..< MAX_ARRAY_NUM {
            let image = UIImage(named: imageFileName[i])
            imageArray.append(image)
        }
        
        lblImageFileName.text = imageFileName[0]
        imageView.image = imageArray[0]
    }

    // returns the number of 'columns' to display.
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return PICKER_VIEW_COLUMN
    }
    
    // returns height of row for each component.
    func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
        return PICKER_VIEW_HEIGHT
    }

    // returns the # of rows in each component..
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return imageFileName.count
    }
    
//    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
//        return imageFileName[row]
//    }

    func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
        let imageView = UIImageView(image:imageArray[row])
        imageView.frame = CGRect(x: 0, y: 0, width: 100, height: 150)
        
        return imageView
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        lblImageFileName.text = imageFileName[row]
        imageView.image = imageArray[row]
    }
}