Image Enum

ReadMe.md

Safer Image/Resource Loading

• non-optional UIImages
• convenience API to build UIImageViews with static resources
• easy to load images from within a framework
• test verifies that all images exist, preventing accidental removal
• this approach could easily be adapted to other types of resources

Image.swift

import UIKit

public enum Image: String {
    private static let bundle = Bundle(for: ClassInImageBundle.self)
  
    // Your images here:
    case imageOne = "image-1"
    case imageTwo = "image-2"
	
    public var uiImage: UIImage {
        return UIImage(named: rawValue, in: Bundle.jmKit, compatibleWith: nil) ?? UIImage()
    }

    public var cgImage: CGImage {
        return uiImage.cgImage ?? UIImage().cgImage!
    }

    public var size: CGSize {
        return uiImage.size
    }

    public var imageView: UIImageView {
        return UIImageView(image: uiImage)
    }
}

private class ClassInImageBundle: NSObject {}

ImageTest.swift

import XCTest
import <AppOrFramework>

class ImageTest: XCTestCase {
    func testImagesExist() {
        Image.allCases.forEach { image in
            XCTAssertTrue(verifyImage(image))
        }
    }

    private func verifyImage(_ image: Image) -> Bool {
        return image.uiImage.size != CGSize.zero
    }
}