Vision Framework

Oct 9 2025 · Swift 5, iOS 26, Xcode 26

Lesson 02: Building Basic Vision Requests

Demo 01

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There’s a starter project in the materials repository for this lesson. Here’s the project, which uses the photos picker from the last lesson. If you want to swap out the camera or the Document picker, you should be able to just bring those ViewModels into this project. You’ll need to update the toolbar code here. And change the value for the photoPickerViewModel. Working with the photos picker on the simulator is pretty easy, so that’s what the demo uses.

if let results = request.results as?
  [VNRecognizedObjectObservation] {

}

let sortedResults = results
  .sorted(by: { $0.confidence > $1.confidence })
  .map { "\($0.labels.first?.identifier ?? "Unknown" )
    - \((Int($0.confidence * 100)))%" }

if let topResult = sortedResults.first {
    self?.classification = topResult
  } else {
    self?.classification = "Unknown"
}

.filter { $0.confidence > 0.01 }

.map { "\($0.identifier) - \((Int($0.confidence * 100)))%" }
.joined(separator: ", ")

if !sortedResults.isEmpty {
  self?.classification = sortedResults
} else {
  self?.classification = "Unknown"
}

if let objects = try? request.supportedIdentifiers() {
  for object in objects {
    logger.debug("Object: \(object)")
  }
}
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