Merge branch 'release/1.4.1'

Author: AlexLittlejohn

ALCameraViewController.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |spec|
   spec.name               = "ALCameraViewController"
-  spec.version            = "1.4.0"
-  spec.summary            = "A camera view controller with custom image picker and image cropping. Written in Swift."
+  spec.version            = "1.4.1"
+  spec.summary            = "A camera view controller with custom image picker and image cropping."
   spec.source             = { :git => "https://github.com/AlexLittlejohn/ALCameraViewController.git", :tag => spec.version.to_s }
   spec.requires_arc       = true
   spec.platform           = :ios, "8.0"

ALCameraViewController/ViewController/CameraViewController.swift

@@ -48,6 +48,7 @@ open class CameraViewController: UIViewController {
     var didUpdateViews = false
     var allowCropping = false
     var animationRunning = false
+    let allowVolumeButtonCapture: Bool
 
     var lastInterfaceOrientation : UIInterfaceOrientation?
     open var onCompletion: CameraViewCompletion?
@@ -158,8 +159,9 @@ open class CameraViewController: UIViewController {
 
 	private let allowsLibraryAccess: Bool
 
-	public init(croppingEnabled: Bool, allowsLibraryAccess: Bool = true, allowsSwapCameraOrientation: Bool = true, completion: @escaping CameraViewCompletion) {
+    public init(croppingEnabled: Bool, allowsLibraryAccess: Bool = true, allowsSwapCameraOrientation: Bool = true, allowVolumeButtonCapture: Bool = true, completion: @escaping CameraViewCompletion) {
 		self.allowsLibraryAccess = allowsLibraryAccess
+        self.allowVolumeButtonCapture = allowVolumeButtonCapture
         super.init(nibName: nil, bundle: nil)
         onCompletion = completion
         allowCropping = croppingEnabled
@@ -266,6 +268,7 @@ open class CameraViewController: UIViewController {
         setupActions()
         checkPermissions()
         cameraView.configureFocus()
+        cameraView.configureZoom()
     }
 
     /**
@@ -276,7 +279,10 @@ open class CameraViewController: UIViewController {
         cameraView.startSession()
         addCameraObserver()
         addRotateObserver()
-        setupVolumeControl()
+
+        if allowVolumeButtonCapture {
+            setupVolumeControl()
+        }
     }
 
     /**

ALCameraViewController/Views/CameraView.swift

@@ -100,6 +100,11 @@ public class CameraView: UIView {
             line.alpha = 0
         }
     }
+
+    public func configureZoom() {
+        let pinchGesture = UIPinchGestureRecognizer(target: self, action: #selector(pinch(gesture:)))
+        addGestureRecognizer(pinchGesture)
+    }
 
     internal func focus(gesture: UITapGestureRecognizer) {
         let point = gesture.location(in: self)
@@ -134,6 +139,37 @@ public class CameraView: UIView {
                 }
         })
     }
+
+    internal func pinch(gesture: UIPinchGestureRecognizer) {
+        guard let device = device else { return }
+
+        // Return zoom value between the minimum and maximum zoom values
+        func minMaxZoom(_ factor: CGFloat) -> CGFloat {
+            return min(max(factor, 1.0), device.activeFormat.videoMaxZoomFactor)
+        }
+
+        func update(scale factor: CGFloat) {
+            do {
+                try device.lockForConfiguration()
+                defer { device.unlockForConfiguration() }
+                device.videoZoomFactor = factor
+            } catch {
+                print("\(error.localizedDescription)")
+            }
+        }
+
+        let velocity = gesture.velocity
+        let velocityFactor: CGFloat = 8.0
+        let desiredZoomFactor = device.videoZoomFactor + atan2(velocity, velocityFactor)
+
+        let newScaleFactor = minMaxZoom(desiredZoomFactor)
+        switch gesture.state {
+        case .began, .changed:
+            update(scale: newScaleFactor)
+        case _:
+            break
+        }
+    }
 
     private func createPreview() {
 

README.md

@@ -1,5 +1,5 @@
 # ALCameraViewController
-A camera view controller with custom image picker and image cropping. Written in Swift.
+A camera view controller with custom image picker and image cropping.
 
 ![camera](https://cloud.githubusercontent.com/assets/932822/8455694/c61de812-2006-11e5-85c0-a57e3d980561.jpg)
 ![cropper](https://cloud.githubusercontent.com/assets/932822/8455697/c627ac44-2006-11e5-82be-7f96e73d9b1f.jpg)