[SWIFT]GradientProgressBarView

프로젝트 하면서 Gradient ProgressBar가 필요해서 Github에서 참조해서 커스텀 했다.

import Foundation

public class IGradientProgressBarView : UIProgressView {
    
    // MARK: - Properties
    
    /// An array of CGColorRef objects defining the color of each gradient stop. Animatable.
    public var gradientColors: [CGColor] = [#colorLiteral(red: 0.9486141801, green: 0.7027528882, blue: 0.1464758813, alpha: 1).cgColor, #colorLiteral(red: 0.955791533, green: 0.4503515363, blue: 0.6127513647, alpha: 1).cgColor] {
        didSet {
            gradientLayer.colors = gradientColors
        }
    }

    
    /** The radius to use when drawing rounded corners for the gradient layer and progress view backgrounds. Animatable.
    *   The default value of this property is 0.0.
    */
    @IBInspectable public var cornerRadius: CGFloat = 0 {
        didSet {
            self.layer.cornerRadius = cornerRadius
            self.clipsToBounds = true
        }
    }
    
    public override var trackTintColor: UIColor? {
        didSet {
            if trackTintColor != UIColor.clear {
                backgroundColor = trackTintColor
                trackTintColor = UIColor.clear
            }
        }
    }
    
    public override var progressTintColor: UIColor? {
        didSet {
            if progressTintColor != UIColor.clear {
                progressTintColor = UIColor.clear
            }
        }
    }
    
    lazy private var gradientLayer: CAGradientLayer = self.initGradientLayer()

    // MARK: - init methods
    
    override public init (frame : CGRect) {
        super.init(frame : frame)
        setup()
    }
    
    required public init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        setup()
    }
    
    // MARK: Layout
    
    override public func layoutSubviews() {
        super.layoutSubviews()
        updateGradientLayer()
    }
    
    override public func setProgress(_ progress: Float, animated: Bool) {
        super.setProgress(progress, animated: animated)
        updateGradientLayer()
    }
    
    // MARK: - Private methods
    
    private func setup() {
        self.layer.cornerRadius = cornerRadius
        self.layer.addSublayer(gradientLayer)
        progressTintColor = UIColor.clear
        gradientLayer.colors = gradientColors
    }
    
    private func initGradientLayer() -> CAGradientLayer {
        let gradientLayer = CAGradientLayer()
        gradientLayer.frame = sizeByPercentage(originalRect: bounds, width: CGFloat(progress))
        gradientLayer.anchorPoint = CGPoint(x: 0, y: 0)
        gradientLayer.position = CGPoint(x: 0, y: 0)
        gradientLayer.startPoint = CGPoint(x: 0, y: 0.5)
        gradientLayer.endPoint = CGPoint(x: 1, y: 0.5)
        gradientLayer.cornerRadius = cornerRadius
        gradientLayer.masksToBounds = true
        return gradientLayer
    }
    
    private func updateGradientLayer() {
        gradientLayer.frame = sizeByPercentage(originalRect: bounds, width: CGFloat(progress))
        gradientLayer.cornerRadius = cornerRadius
    }
    
    private func sizeByPercentage(originalRect: CGRect, width: CGFloat) -> CGRect {
        let newSize = CGSize(width: originalRect.width * width, height: originalRect.height)
        return CGRect(origin: originalRect.origin, size: newSize)
    }
}

 

[사용방법]

import UIKit
import Alamofire

class DownloadViewController: UIViewController {
	@IBOutlet weak var downloadProgressBar: IGradientProgressBarView!
    
    
    override func viewDidLoad() {
        super.viewDidLoad()

		downloadProgressBar.gradientColors = [UIColor.squash.cgColor, UIColor.rosyPink.cgColor]
        downloadProgressBar.progress = 0.0
        
    }
    
    func fileDownlaodRequest(downloadUrl: String, bundle: String, complete: @escaping (Bool) -> Void) {
        let destination: DownloadRequest.Destination = {[weak self] _, _ in
            var fileURL: URL?
            if let filePath = BundleFileManager.shared.filePath {
                fileURL = filePath.appendingPathComponent(bundle)
                print("다운로드 파일 URL : \(fileURL?.absoluteString)")
            }
            return (fileURL!, []) 
        }
        
        AF.download(downloadUrl, to: destination)
            .downloadProgress { [weak self] progress in
                self?.downloadProgressBar.progress = Float(progress.fractionCompleted)
            }
            .response { [weak self] response in
                if response.error == nil {
                    complete(true)
                } else {
                    complete(false)
                }
            }
    }
}