What’s new in ClassKit

// Create a context for quiz
let quizContext = CLSContext.init(type: CLSContextType.quiz, identifier: "science_Investigation_quiz", title: "Measurements Quiz")

// Add a summary describing this context
quizContext.summary = "A short quiz to test how much students know about scientific measurements and how to examine and analyze scientific data."

// Add a thumbnail for this context — ClassKit will downsize thumbnails to 330 x 330 px if needed
let bundle = Bundle.main
if let resourceURL = bundle.resourceURL {
    let imageURL = resourceURL.appendingPathComponent("measurements_quiz.jpg")
    if let thumbnail = thumbnailFromImage(atURL: imageURL) {
        quizContext.thumbnail = thumbnail
    }
}

// Create a thumbnail of maximum dimension 330 x 330 px from an image file
func thumbnailFromImage(atURL: URL) -> CGImage? {
   if let imageSource = CGImageSourceCreateWithURL(atURL as CFURL, nil) {
       let thumbnailOptions = [kCGImageSourceCreateThumbnailFromImageAlways as String: true,
                               kCGImageSourceThumbnailMaxPixelSize as String: 330]
       return CGImageSourceCreateThumbnailAtIndex(
           imageSource, 0, thumbnailOptions as CFDictionary);
   }
   return nil
}

// Add suggested age range appropriate for the content — ages 9 to 11 years

quizContext.suggestedAge = NSRange(9...11)

// Add suggested time to complete this quiz — 15 to 20 minutes

quizContext.suggestedCompletionTime = NSRange(15...20)

// Add progress reporting capabilities

let reportingPercentDetails = "Reports percentage of progress"
let reportingCapabilityPercent = CLSProgressReportingCapability.init(
        kind: .percent,
        details: reportingPercentDetails)

let reportingQuantityDetails = "Reports number of hints used"
let reportingCapabilityQuantity = CLSProgressReportingCapability.init(
        kind: .quantity,
        details: reportingQuantityDetails)

quizContext.addProgressReportingCapabilities([reportingCapabilityPercent,
                                       reportingCapabilityQuantity])