iOS Concurrency with GCD & Operations

Sep 12 2023 · Swift 5.8, macOS 13, iOS 16, Xcode 14.3

Part 3: Operations & OperationQueues

21. Challenge: Implement a Dependency

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Challenge: Implement Dependency

Continue with your final project from the previous video or open the starter project. Update downloadImageOp in ImageStore to apply the tilt-shift filter to the downloaded image.

let downloadOp = NetworkImageOperation(url: images[index].url)
let tiltShiftOp = TiltShiftOperation()
tiltShiftOp.completionBlock = {  // change operation to tiltShiftOp
  guard let image = tiltShiftOp.image else { return }  // change operation to tiltShiftOp
  DispatchQueue.main.async {
    self.images[index].image = image