I'm working on a Swift iOS app where I want the user to be able to place an image (a sticker such as a beard or an eyepatch) over another image.
Currently I have it working to where they can take a photo or pull an image up from their Photos and have that display in a UIImage. Obviously next is adding the sticker. I've been able to dig up zero data on this from Google or Stack. And I mean zero.
Does anyone have a general idea of how I would execute this? Specifics would help too of course.
Here's the easy way.
have a UIView as a parent, let's say stickerView
add image to stickerView
add stickers to stickerView
save a snapshot of stickerView
Here's the code to snapshot UIView,
extension UIImage {
class func imageWithView(view: UIView) -> UIImage {
UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.opaque, 0.0)
view.drawViewHierarchyInRect(view.bounds, afterScreenUpdates: true)
let img = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return img
}
}
Usage
let snapshotImage = UIImage.imageWithView(stickerView)
I would suggest you to add UIImageView for sticker instead of editing image when adding sticker. And after that when save the image then you should edit the image.
Related
I am trying to convert UIView containing 2 UIImageView to UIImage. Almost everything is working fine, but on final conversion some transparent diagonal lines are shown in final UIImage. I cant understand why is this happening. If someone can help. Thanks.
extension UIView {
/**
Convert UIView to UIImage
*/
func toImage() -> UIImage {
UIGraphicsBeginImageContextWithOptions(self.bounds.size, self.isOpaque, 0.0)
self.drawHierarchy(in: self.bounds, afterScreenUpdates: false)
let snapshotImageFromMyView = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return snapshotImageFromMyView!
}
}
following are before and after saving image
enter image descriptBefore SavingAfter Saving
I found the problem, my code was converting resulting UIImage to Webp at 0.70 quality. That was adding lines in image. By saving jpg and then converting to webp fixed the problem.
Is there a way to integrate a UIImageView when taking photos?
I can't seem to find a topic discussing this.
What I wanted to do is to have a UIImageView overlay on the preview. When the shutter is tapped, it should take the picture with the UIImageView embedded in it.
So here's where I am right now. The "test image" part will be made draggable on top of the preview view. I want to include that image with the image I'll be taking when I push the shutter button.
Is this possible? Or is there a better way?
I'm using AVCaptureVideoPreviewLayer, AVCaptureSession and AVCapturePhotoOutput. I'm just putting the UIIMageView above the UIView where the AVCaptureVideoPreviewLayer is also a subview.
EDIT: Tested saving the UIView as an image, and it doesn't include the preview layer (only returns the UIView + UIImageView overlay).
There is at least two ways of doing this.
1) Capture photo from camera and add overlay image based on draggable image view position. This will produce best possible quality.
2) If you don't need photo quality you can use another solution - render draggable view layer in graphic context and video preview layer:
func takePhotoWithOverlay() -> UIImage? {
let overlayImageView // UIImageView with overlay image
let videoPreviewLayer // AVCaptureVideoPreviewLayer
guard let superview = overlayImageView.superview else { return nil }
UIGraphicsBeginImageContextWithOptions(superview.bounds.size, false, 0.0)
defer { UIGraphicsEndImageContext() }
guard let context = UIGraphicsGetCurrentContext() else { return nil }
videoPreviewLayer.render(in: context)
overlayImageView.layer.render(in: context)
return UIGraphicsGetImageFromCurrentImageContext()
}
I have One Uitextview I want to add Image like this
and I want to Draging and change place in every where in Uitextview like Page app how can I do this.enter image description here
Here is my code :
UIGraphicsBeginImageContextWithOptions(txtEditor.bounds.size, false, 0)
txtEditor.drawHierarchy(in: txtEditor.bounds, afterScreenUpdates: true)
let txtimage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
But in this code I have one size and I can't change Uiimage size in uitextview.
I'm developing an app where I have an area where there is an image in the background, and another image that I can move, like a sticker.
My goal is to create and save an image with the background image and the "sticker" above, using Swift. Here's my function that allows me to do what I want (my background view is called "imageView", my imageview sticker is called "jacques") :
let newSize = CGSizeMake(imageView.image!.size.width, imageView.image!.size.height)
UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0);
imageView.image!.drawInRect(CGRectMake(0,0,newSize.width,newSize.height))
let jacquesX = ((jacques.frame.origin.x - imageView.frame.origin.x) * (imageView.image?.size.width)!) / UIScreen.mainScreen().bounds.width
let jacquesY = ((jacques.frame.origin.y - imageView.frame.origin.y) * (imageView.image?.size.height)!) / UIScreen.mainScreen().bounds.height
let jacquesWidth: CGFloat = jacques.image!.size.width
let jacquesHeight: CGFloat = jacques.image!.size.height
jacques.image!.drawInRect(CGRectMake(jacquesX, jacquesY, jacquesWidth, jacquesHeight))
let newImage: UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
UIImageWriteToSavedPhotosAlbum(newImage, self, "image:didFinishSavingWithError:contextInfo:", nil)
Unfortunately, my sticker isn't the right size. I think it's well placed in the image, but it's size is way too small. I don't know if my solution is the best one, i'm open to all suggestion. And I'm new, so if you have good practice to share, i'm all ears :)
You could do this in the storyboard. First you could size the picture however you want. To create a sticker effect you could just add imageView, size it to background size,and then put jacques on the storyboard, and finally resize them.
I was using
UIGraphicsBeginImageContext(view.frame.size)
view.layer.renderInContext(UIGraphicsGetCurrentContext())
let screenshot = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
to share a screenshot of the score the user made in the game but I saw some apps that share a custom image with the score the user made, and I really can't find how to make that custom image
Make your custom UIView and than set the score in it's label and use above code.You do not need to show your customView.It's just to take snapshot.
UIGraphicsBeginImageContext(customView.frame.size)
customView.layer.renderInContext(UIGraphicsGetCurrentContext())
let screenshot = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()