39 lines
969 B
Swift
39 lines
969 B
Swift
//
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// CameraView+Zoom.swift
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// mrousavy
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//
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// Created by Marc Rousavy on 18.12.20.
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// Copyright © 2020 mrousavy. All rights reserved.
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//
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import Foundation
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import UIKit
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extension CameraView {
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@objc
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final func onPinch(_ gesture: UIPinchGestureRecognizer) {
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let scale = max(min(gesture.scale * pinchScaleOffset, cameraSession.maxZoom), CGFloat(1.0))
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if gesture.state == .ended {
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pinchScaleOffset = scale
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return
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}
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// Update zoom React prop
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zoom = NSNumber(value: scale)
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didSetProps([])
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}
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func addPinchGestureRecognizer() {
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removePinchGestureRecognizer()
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pinchGestureRecognizer = UIPinchGestureRecognizer(target: self, action: #selector(onPinch(_:)))
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addGestureRecognizer(pinchGestureRecognizer!)
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}
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func removePinchGestureRecognizer() {
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if let pinchGestureRecognizer = pinchGestureRecognizer {
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removeGestureRecognizer(pinchGestureRecognizer)
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self.pinchGestureRecognizer = nil
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}
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}
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}
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