Supported camera view rotating, partially.

It is too difficult to support rotating perfectly.....

Author: sonsongithub

CameraViewController.h

@@ -76,6 +76,7 @@ typedef enum {
 	NSTimer							*fpsTimer;
 	int								frameCounter;
 	double							fpsTimeStamp;
+	BOOL							canRotate;
 }
 - (id)initWithCameraViewControllerType:(CameraViewControllerType)value;
 - (void)startToMeasureFPS;

CameraViewController.m

@@ -168,8 +168,8 @@ - (void)prepareWithCameraViewControllerType:(CameraViewControllerType)value {
 	}
 
 	// setting preview layer
-	previewView = [[UIView alloc] initWithFrame:CGRectZero];
-	[previewView setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
+	previewView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 1024, 1024)];
+	[previewView setAutoresizingMask:UIViewAutoresizingNone];
 
 	previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:session];
 }
@@ -184,36 +184,22 @@ - (id)initWithCameraViewControllerType:(CameraViewControllerType)value {
 }
 
 - (void)adjustCameraPreviewLayerOrientaion:(UIInterfaceOrientation)orientation {
-	CATransform3D m;
-	CGRect f = previewLayer.frame;
-	
-	float offsetx = (f.size.height - f.size.width)/2;
-	float offsety = (f.size.width - f.size.height)/2;
-	
 	switch(orientation) {
 		case UIInterfaceOrientationLandscapeLeft:
-			m = CATransform3DMakeTranslation(offsetx, offsety, 0);
-			m = CATransform3DRotate(m, M_PI/2, 0, 0, 1);
+			previewView.transform = CGAffineTransformMakeRotation(M_PI_2);
 			break;
 		case UIInterfaceOrientationLandscapeRight:
-			m = CATransform3DMakeTranslation(offsetx, offsety, 0);
-			m = CATransform3DRotate(m, 3 * M_PI/2, 0, 0, 1);
+			previewView.transform = CGAffineTransformMakeRotation(M_PI_2);
 			break;
 		case UIInterfaceOrientationPortrait:
-			m = CATransform3DMakeTranslation(0, -2, 0);
-			m = CATransform3DRotate(m, 0, 0, 0, 1);
+			previewView.transform = CGAffineTransformMakeRotation(0);
 			break;
 		case UIInterfaceOrientationPortraitUpsideDown:
-			m = CATransform3DMakeTranslation(0, -2, 0);
-			m = CATransform3DRotate(m, M_PI, 0, 0, 1);
+			previewView.transform = CGAffineTransformMakeRotation(0);
 			break;
 		default:
-			m = CATransform3DMakeTranslation(0, -2, 0);
-			m = CATransform3DRotate(m, 0, 0, 0, 1);
 			break;
 	}
-	
-	previewLayer.transform = m;
 }
 
 - (void)waitForSessionStopRunning {
@@ -251,7 +237,7 @@ - (id)initWithCoder:(NSCoder *)coder {
 
 - (void)viewWillAppear:(BOOL)animated {
 	[super viewWillAppear:animated];
-	
+
 	float width = self.view.frame.size.width;
 	float height = self.view.frame.size.width * aspectRatio;
 
@@ -261,6 +247,8 @@ - (void)viewWillAppear:(BOOL)animated {
 	[session startRunning];
 
 	[self adjustCameraPreviewLayerOrientaion:self.interfaceOrientation];
+	
+	canRotate = YES;
 }
 
 - (void)viewWillDisappear:(BOOL)animated {
@@ -276,9 +264,9 @@ - (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrie
 }
 
 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
-	return (interfaceOrientation == UIInterfaceOrientationPortrait);
-	// for orientation test
-	//return YES;
+	// I can't understand the orienation behavior of view controllers.....
+	// Recommend that you don't overide this method... or please help me.
+	return canRotate;
 }
 
 #pragma mark - AVCaptureVideoDataOutputSampleBufferDelegate

cv/NormalCameraViewController.m

@@ -35,12 +35,33 @@ @implementation NormalCameraViewController
 
 - (void)viewWillAppear:(BOOL)animated {
 	[super viewWillAppear:animated];
+
+	CGRect frame;
+	switch(self.interfaceOrientation) {
+		case UIInterfaceOrientationLandscapeLeft:
+			frame = CGRectMake(0, self.view.frame.size.width - 44, self.view.frame.size.height, 44);
+			break;
+		case UIInterfaceOrientationLandscapeRight:
+			frame = CGRectMake(0, self.view.frame.size.width - 44, self.view.frame.size.height, 44);
+			break;
+		case UIInterfaceOrientationPortrait:
+			frame = CGRectMake(0, self.view.frame.size.height - 44, self.view.frame.size.width, 44);
+			break;
+		case UIInterfaceOrientationPortraitUpsideDown:
+			frame = CGRectMake(0, self.view.frame.size.height - 44, self.view.frame.size.width, 44);
+			break;
+		default:
+			frame = CGRectMake(0, self.view.frame.size.height - 44, self.view.frame.size.width, 44);
+			break;
+	}
 
 	// add toolbar
-	UIToolbar *bar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height - 44, self.view.frame.size.width, 44)];
+	UIToolbar *bar = [[UIToolbar alloc] initWithFrame:frame];//CGRectMake(0, self.view.frame.size.height - 44, self.view.frame.size.width, 44)];
+	[bar setAutoresizingMask:UIViewAutoresizingFlexibleTopMargin|UIViewAutoresizingFlexibleWidth];
 	[self.view addSubview:bar];
 	[bar release];
 
+	// add button
 	UIBarButtonItem *closeButton = [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Close", nil) style:UIBarButtonItemStyleBordered target:self action:@selector(close:)] autorelease];
 	[bar setItems:[NSArray arrayWithObject:closeButton]];
 }

cv/cvViewController.m

@@ -36,6 +36,10 @@
 
 @implementation cvViewController
 
+- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
+	return YES;
+}
+
 - (IBAction)openCameraViewController:(id)sender {
 	NormalCameraViewController *controller = [[NormalCameraViewController alloc] initWithCameraViewControllerType:BufferGrayColor|BufferSize640x480];
 	[self presentModalViewController:controller animated:YES];

cv/en.lproj/cvViewController.xib

@@ -100,7 +100,6 @@
 						<string key="NSFrame">{{73, 256}, {175, 37}}</string>
 						<reference key="NSSuperview" ref="774585933"/>
 						<reference key="NSWindow"/>
-						<reference key="NSNextKeyView"/>
 						<bool key="IBUIOpaque">NO</bool>
 						<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
 						<int key="IBUIContentHorizontalAlignment">0</int>