From 694aecb78cb82797f038e44e3187bb6b5d5a1a60 Mon Sep 17 00:00:00 2001
From: Yannick Winters <yannick.winters@appwise.be>
Date: Tue, 16 Aug 2016 16:20:24 +0200
Subject: [PATCH] Added function to zoom from code

---
 LLSimpleCamera/LLSimpleCamera.h | 11 +++++++++++
 LLSimpleCamera/LLSimpleCamera.m | 12 ++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/LLSimpleCamera/LLSimpleCamera.h b/LLSimpleCamera/LLSimpleCamera.h
index 4e9f9f5..5e438a9 100644
--- a/LLSimpleCamera/LLSimpleCamera.h
+++ b/LLSimpleCamera/LLSimpleCamera.h
@@ -215,6 +215,13 @@ typedef enum : NSUInteger {
  */
 - (void)alterFocusBox:(CALayer *)layer animation:(CAAnimation *)animation;
 
+/**
+ *  Function to zoom the camera from code
+ *
+ *  @param factor from 0.0 to 1.0
+ */
+- (void) scaleToFactor:(CGFloat)factor;
+
 /**
  * Checks is the front camera is available.
  */
@@ -224,4 +231,8 @@ typedef enum : NSUInteger {
  * Checks is the rear camera is available.
  */
 + (BOOL)isRearCameraAvailable;
+
+
+
+
 @end
diff --git a/LLSimpleCamera/LLSimpleCamera.m b/LLSimpleCamera/LLSimpleCamera.m
index db75c9f..28600c9 100644
--- a/LLSimpleCamera/LLSimpleCamera.m
+++ b/LLSimpleCamera/LLSimpleCamera.m
@@ -150,6 +150,18 @@ - (void)handlePinchGesture:(UIPinchGestureRecognizer *)recognizer
     }
 }
 
+#pragma mark - Zooming programmatically
+- (void) scaleToFactor:(CGFloat)factor
+{
+	NSError *error = nil;
+	if ([self.videoCaptureDevice lockForConfiguration:&error])
+	{
+		[self.videoCaptureDevice rampToVideoZoomFactor:factor withRate:10];
+		
+		[self.videoCaptureDevice unlockForConfiguration];
+	}
+}
+
 #pragma mark - Camera
 
 - (void)attachToViewController:(UIViewController *)vc withFrame:(CGRect)frame