react-native-vision-camera/package/ios/PreviewView.swift
Marc Rousavy 3169444697
feat: Implement resizeMode prop for iOS (#1838)
* feat: Implement `resizeMode` prop for iOS

- `"cover"`: Keep aspect ratio, but fill entire parent view (centered).
- `"contain"`: Keep aspect ratio, but make sure the entire content is visible even if it introduces additional blank areas (centered).

* chore: Update prop docs

* Update CameraProps.ts

* Lint & Format
2023-09-23 10:14:27 +02:00

52 lines
1.2 KiB
Swift

//
// PreviewView.swift
// VisionCamera
//
// Created by Marc Rousavy on 30.11.22.
// Copyright © 2022 mrousavy. All rights reserved.
//
import AVFoundation
import Foundation
import UIKit
class PreviewView: UIView {
/**
Convenience wrapper to get layer as its statically known type.
*/
var videoPreviewLayer: AVCaptureVideoPreviewLayer {
// swiftlint:disable force_cast
return layer as! AVCaptureVideoPreviewLayer
// swiftlint:enable force_cast
}
/**
Gets or sets the resize mode of the PreviewView.
*/
var resizeMode: ResizeMode = .cover {
didSet {
switch resizeMode {
case .cover:
videoPreviewLayer.videoGravity = .resizeAspectFill
case .contain:
videoPreviewLayer.videoGravity = .resizeAspect
}
}
}
override public class var layerClass: AnyClass {
return AVCaptureVideoPreviewLayer.self
}
init(frame: CGRect, session: AVCaptureSession) {
super.init(frame: frame)
videoPreviewLayer.session = session
videoPreviewLayer.videoGravity = .resizeAspectFill
}
@available(*, unavailable)
required init?(coder _: NSCoder) {
fatalError("init(coder:) is not implemented!")
}
}