I am using NinevehGL framework and Qualcomm AR in order to intract with 3D object , but I faced with a problem which is I can not overlay any view , button , text on the camera !!! or better to say add any view to subview !!
for example [self.view addSubView:myImage];
but when camera starts , nothing adds !
I would be grateful if you tell me how to do so ..
You need to make sure that your views are positioned correctly (center, bounds, and transform). It's a bit tricky because the AR camera is always displayed in landscape right orientation if you're using the default orientation.
You can display it in portrait orientation, but then you need to modify the values while configuring video background. I suggest to use the default landscape right orientation.
Related
You cannot subclass UIImagePickerController, but surely there is clean(not saying obvious or easy) way to keep camera feed as background of UIViewController and just make UIImagePickerController overlay to rotate like it would respond to shouldAutorotateToInterfaceOrientation: ?
I just want to UIImagePicker stay in its beloved portrait orientation, but I want rotate my UI buttons that I put into camera overlay. What I have now, is changing each element's orientation with CGAffineTransformMakeRotation() so it always stays at the same place, but rotates around each center.
I downloaded Layar app and the somehow achieved it... camera feed stays and UI buttons rotates (like UIViewController's style).
edit: I have to use iOS 5.1 and Xcode 4.2
edit2: for now I have this int DIRECTION and depending on what is the current orientation of the device I assign from 0 to 3, so I can decide with what angle to rotate all UI buttons. I do this inside shouldAutorotateToInterfaceOrientation: which is returning only YES for portrait and upside portrait.
You have to put constraints on the buttons and picker view.
Use this link to study AutoLayout concept by Ray Wenderlich
Hope this will help but you have to go through it thoroughly.
I created a custom camera overlay for the live screen camera view and have imported my own custom icons for the camera, flash and flip buttons. Everything looks good in portrait mode, but when I switch the live camera screen to landscape mode, the orientation of the camera stays in portrait mode and shows this in console,
"Error: CGAffineTransformInvert: singular matrix"
I tried using the auto resizing mask, also have tried setting two different frames for the icons in both portrait and landscape mode in didRotateFromInterfaceOrientation method. But none of these are working.
My question is, will the landscape orientation support only the default iPhone camera overlay view or will it also support the custom overlayview.
Here are the screenshots indicating the behaviour of the icons repositioning each other when switched from portrait to landscape mode. I want exactly like this in my custom overlay view.
Edit:
I've made the live screen of my custom camera overlay to change by using the UIDevice Orientation method. But right now, the frame is not resizing when i try to switch from the portrait to landscape mode. So, i just want the entire frame to resize in landscape mode. Also, in this piece of code, if i try to change the value of CAMERA_TRANSFORM_Y,
#define CAMERA_TRANSFORM_X 1
#define CAMERA_TRANSFORM_Y 1.234
self.picker.cameraViewTransform = CGAffineTransformScale(self.picker.cameraViewTransform, CAMERA_TRANSFORM_X, CAMERA_TRANSFORM_Y);
the size of the overlay view reduces both from the top and bottom margin. But, more size gets reduced from the bottom than from the top margin. I want the overlay size to change uniformly both from the top and from the bottom margin.
This is my sample code,
Sample project
I'm looking to change the phone's rotation based on the size of an image. is there a way to detect if the image has 480px x 300px dimensions then use landscape rotation and vice versa?
I have many photos some of which are best view landscape and other best viewed in portrait mode.
thanks for any help.
Think hard about whether you want to rotate the whole UIView that the image is on, versus just doing a rotation transform on the image, so it's turned 90 degrees inside a view that's still portrait mode. When I came up against this issue myself recently, I chose the latter. The whole rest of my app is locked in portrait mode, and to have this one view re-orient its whole thing to be landscape was just weird. Instead I float the image out in a UIView up on top of everything else, and rotate it if that's the best-fit orientation of the image.
I'm having a nightmare with the rotation on iPad. I've searched all over the place for some tutorials, but nothing seems to really be for what I want. (Possibly not searching for the right thing?!)
I have a portrait view by default which is an image and a button inside the view. When I rotate, I detect this can work out if it's landscape. I then try to set the frame size of the uiview to fit nicely on the screen.
If I let it autoresize, it simply stretches and fills the screen. This I don't want.
but the trouble is, when I resize, the button gets resized too, but not in the same ratio as the image.
My question is: What's the best way to resize the view. I wanted to simply reduce the uiview by say 60% and it resizes EVERYTHING in that view with the same 60%. The only way I see this is working at the moment is to create two views... but that's twice the work and maintenance!
I've tried messing with the autosizing arrows in Interface builder, but that again seems to screw things up more!
I'm completely lost here!! Thanks for any info
The problem you have there is that the view is automatically resized to the screen ratio. On an iPad in Portrait Orientation the screen size is 1024x768. After the rotation to Landscape the origin rotates too and your screen content is skewed or stretched to 768x1024.
What you need to do is to override the
-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration
message of the UIViewController of the view which rotates. This message is called within the animation block of the rotation. You just set the framesize of your subviews (the button) to whatever is best for you. Once i had a problem with rotating an OpenGL view. The content of the view was stretched when rotating to landscape. Since it is not possible to alter any OpenGL matrices within the animation block the only solution i found was to make the view quadratic and to set the origin behind the bounds of the screen (in -x direction). You have to override the message also to reset the origin above the screen (in -y direction) bounds in landscape mode, to keep the viewport in the middle of the screen. That way the view kept its ratio. Whatever solution is best for you, overriding this message should work out.
Have you tried disabling the autoresizesSubviews property on your UIView? It should prevent any size changes on the subviews when you resize your view.
I haven't been able to figure this out. Could someone please help me? I am trying to stop one UIView in my app from rotating when the device is turned.
I am working on a drawing app. Right now, when the device is turned, all UI elements turn with it. What I am trying to do is have all the buttons, menus, etc. turn, but have my canvas UIView be static and ignore the rotation of the phone.
If the canvas view is a subview of a view that rotates, then it will rotate as well. It's inescapable.
If you have one element of a view that you do not want to appear to rotate, you have use a rotation transform to programmatically rotate that one view back to the orientation and frame you want it have.
You could use the following to prevent the view itself from rotating:
- (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)interfaceOrientation {
return false;
}
Then manually rotate the individual elements you want rotated.
OP here. Rotating the view using CGAffineTransformMakeRotate() worked like a charm. Thanks, TechZen!