Users need to be able to take photo of their ID. I need to add a blue frame to camera view as a guide. Guide should have same aspect ratio on all device sizes and fit a label with instructions. Can I accomplish this using UIImagePicker?
Here is some incomplete code. Thanks for any help.
UIImageView *overlayImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#""]];
CGRect overlayRect = CGRectMake(0, 0, self.view.frame.size.height - 16, self.view.frame.size.width - 16);
[overlayImage setFrame:overlayRect];
[self.imagePicker setCameraOverlayView:overlayImage];
Use AVCaptureDevice, AVCaptureSession, AVCaptureVideoPreviewLayer and AVCapturePhotoOutput.
Set AVCaptureDeviceInput as input of capture session, and photo output as output of capture session. Initialize AVCaptureVideoPreviewLayer with AVCaptureSession and add to your view.layer thought addSublayer. You can use UIViewController from storyboard or programmatically instantiated controller, add picture of overlay or cornered view.layer.borderWidth or UIBezierPath. Set up controller as AVCapturePhotoCaptureDelegate, add delegate methods. Use capturePhoto(with:delegate:) method. Enjoy.
Related
I was wondering is there any way to force replaykit to record only a part of the screen in square mode? The current API seems to record the whole screen!
ReplayKit records everything on the screen exempt system prompts and dialogs.
You can however overlay another UIWindow on top of your main one and apply a mask to an empty UIView to hide parts of the screen and force a square recording.
The frame ratio of the final recording will still be equal to the screen though.
_overlayWindow = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds]; //Full sized window
_overlayWindow.backgroundColor = [UIColor clearColor];
_overlayWindow.userInteractionEnabled = false;
_overlayWindow.hidden = NO;
UIView *maskedView = [[UIView alloc] initWithFrame:_overlayWindow.bounds];
// Create a mask layer
CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
CGRect maskRect = CGRectMake(0, 0, 200, 200);
// Create a path with the rectangle in it.
CGPathRef path = CGPathCreateWithRect(maskRect, NULL);
maskLayer.path = path;
// Set the mask of the view.
maskedView.layer.mask = maskLayer;
[_overlayWindow addSubview:maskedView];
At the moment ReplayKit framework does not provide customisation of Screen Recording in terms of Screen size. So you have to record whole screen of GamePlay.
In my view I have a UIView that I use to preview the camera. It's a lot smaller than the regular preview view (128x128). I initialise the UIImagePickerController like this:
self.picker = [[UIImagePickerController alloc] init];
self.picker.delegate = self;
self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
self.picker.cameraDevice = UIImagePickerControllerCameraDeviceFront;
self.picker.showsCameraControls = NO;
self.picker.view.frame = self.profilePictureView.frame;
I then use [v addSubview:self.picker.view]; to show the camera's preview within my custom UIVIew. So far this works as intended, I see the part of the camera preview that overlaps my custom view in that view (essentially masking the preview with my custom view).
Now I'm trying to get what is displayed in my UIView into a UIImage (resulting in a 128x128 image). I tried using the delegation methods, but I only get the full size image from the camera there. I also tried taking a screenshot from the view but I got lost...
How can I create a UIImage with the exact same content as the view I use to render the camera preview, including size, offset and ratio?
I want to blend two UIImages as Fused App is doing:
https://itunes.apple.com/us/app/fused-double-exposure-video/id869117407?mt=8
What Fused is doing, it takes two images (foreground & background) and apply blending in such a way that background remains the same and user can move,rotate & size the foreground image. I attached two images for better understanding. I want to achieve the same behaviour in my app. I have tried all CoreImage & CoreGraphics but I could not achieve this. Help needed from all of you.
First Screen: After applying Overly blend mode.
Second Screen: Change the size of foreground image:
My Result:
You can achieve what you want by using CHTStickerView, I've used it before and it works great. CHTStickerView is a movable, resizable, rotatable UIView with one finger, which is fully customizable.
Use CHTStickerView as your foreground image and UIImageView as your background image.
So your code should look something like this:
- (void)viewDidLoad {
[super viewDidLoad];
//background
UIImageView *backgroundImageView = [[UIImageView alloc] initWithFrame:self.view.frame];
[backgroundImageView setImage:#"background.png"];
[self.view addSubview:backgroundImageView];
//foreground
UIImageView *foregroundImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 150, 150)];
[foregroundImageView setImage:[UIImage imageNamed:#"foreground.png"]];
CHTStickerView *stickerView = [[CHTStickerView alloc] initWithContentView:foregroundImageView]; //set your foreground image as content in CHTStickerView
stickerView.center = self.view.center;
stickerView.delegate = self;
[stickerView setImage:[UIImage imageNamed:#"Close"] forHandler:CHTStickerViewHandlerClose];
[stickerView setImage:[UIImage imageNamed:#"Rotate"] forHandler:CHTStickerViewHandlerRotate];
[self.view addSubview:stickerView];
}
UPDATE
Alright I downloaded the app and checked out blend. I think what the app is doing is just getting the opacity value of the foreground image with the slide bar and drawing the foreground image (opacity set) on the background image.
So to set the opacity of a UIImage check this out: How to set the opacity/alpha of a UIImage?
And to draw and image over another check this out: Draw another image on a UIImage
To summarize, what you need to do is:
1) get the position and size of the CHTStickerView after user rotated and resize
2) get the UIImage from CHTStickerView, get the opacity value from slider
3) set opacity to image and draw image on your background image
Hope this helps!
I'm trying to get the video output on my screen in Swift. But the screen stays completely white. I found this tutorial in ObjC and I followed it (only in Swift style syntax).
In there there is a line previewLayer.frame = myView.bounds;
But the field .frame seems to be read only in swift. And I think this might be why I don't see anything on the screen.
How can I set the frame for the previewLayer in Swift?
I see three points in that tutorial where you could end up not displaying the preview, and thus getting a white screen. Below are the Obj-C and Swift counterparts.
1) You might have missed adding the input to the capture session:
// [session addInput:input];
session.addInput(input)
2) You might not have initialized the preview layer's bounds to that of your view controller:
// UIView *myView = self.view;
// previewLayer.frame = myView.bounds;
previewLayer.frame = self.view.bounds
3) You might not have added the preview layer as a sublayer of your view:
// [self.view.layer addSublayer:previewLayer];
self.view.layer.addSublayer(previewLayer)
I know a few methods to blur images - the Apple class(ApplyLightEffect) , and the CIFilter , but they are all takes UIImage and create a blur.
I need to simply create some layer above images that are moving, and blur this layer so everything behind is blur. the blur effect should be very gentle.
How would i get that in a simple way ? are there more ways to apply similar effects to blur that i can check ? (which are dynamic )
Thanks .
Check out this iOS Framework:
https://github.com/nicklockwood/FXBlurView
Instead of instantiating your view like this:
UIView *view = [[UIView alloc] init];
Import FXBlurView and do this:
FXBlurView *blurredView = [[FXBlurView alloc] init];
You can also set some custom parameters:
[blurredView setBlurRadius:30]; //Sets radius of blur
[blurredView setDynamic:NO]; //Disables whether the blur updates in real time.
[blurredView setBlurEnables:YES]; //Enables/disables the blur.
[blurredView setTintColor:nil]; //Set to nil to get rid of the blue glow from the default iOS tint color.
That should do it.