I am working on creating a small word guessing app for a school assignment in uikit and I have been trying to figure out a way to overlay an image that updates based on the amount of incorrect guesses left on top of another image. I've spent almost 2 1/2 hours checking and I could not find a single method that worked.
So far this is what I've tried
let bgimg = UIImage(named: "background") // The image used as a background
let bgimgview = UIImageView(image: bgimg) // Create the view holding the image
bgimgview.frame = CGRect(x: 0, y: 0, width: 500, height: 500) // The size of the background image
let frontimg = UIImage(named: "Tree \(currentGame.incorrectMovesRemaining)") // The image in the foreground
let frontimgview = UIImageView(image: frontimg) // Create the view holding the image
frontimgview.frame = CGRect(x: 150, y: 300, width: 50, height: 50) // The size and position of the front image
bgimgview.addSubview(frontimgview) // Add the front image on top of the background
I commented this one out so that my code could work
let bottomImage = UIImage(named: "background")!
// let topImage = UIImage(named: "Tree \(currentGame.incorrectMovesRemaining)")!
// let rect = CGRect(origin: CGPoint(x: 0,y :0), size: CGSize(width: 100, height: 100))
// let newSize = rect.size // set this to what you need
// UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
//
// bottomImage.draw(in: rect)
// topImage.draw(in: rect)
//
// let newImage = UIGraphicsGetImageFromCurrentImageContext()
// UIGraphicsEndImageContext()
// }
//
// var backgroundImageButton: UIButton! {
// backgroundImageButton.setBackgroundImage(newImage)
You should be able to do this by adjusting the alpha value of the foreground image view. Alpha controls the transparency of a view-- an alpha of 1.0 makes it opaque, a value of 0 is invisible, and values between 0 and 1 make a view more or less transparent. If you have the two image views aligned so that one covers the other, you can set the foreground image alpha to any value from 0 to 1 to adjust how transparent it is.
Related
I been trying to convert an UIImage to a matrix or a bitarray in swift but I don`t know how
import UIKit
import PlaygroundSupport
let bgimg = UIImage(named: "IMG_8565.JPG") // The image used as a background
let bgimgview = UIImageView(image: bgimg) // Create the view holding the image
bgimgview.frame = CGRect(x: 0, y: 0, width: 500, height: 500) // The size of the background image
let frontimg = UIImage(named: "spongebob.png") // The image in the foreground
let frontimgview = UIImageView(image: frontimg) // Create the view holding the image
frontimgview.frame = CGRect(x: 100, y: 200, width: 150, height: 150) // The size and position of the front image
bgimgview.addSubview(frontimgview) // Add the front image on top of the background
the last line contains the image and is what i`m trying to change into a matrix or a bitarray
also I know there are similar post but i hardly understand them, so please help me
mb you want just convert your image to the Data?
guard let image = UIImage(named: "IMG_8565.JPG") else { return }
guard let data = image?.jpegData(compressionQuality: 1.0) else { return }
compressionQuality: 1.0 - it's max quality for your image.
I want to add a logo as a background image to my tableView. Image size is 50px, 50px.
I tried the code below, but this puts the image lower right corner.
let imageView = UIImageView(image: UIImage(named: "logo"))
imageView.contentMode = .scaleAspectFit
imageView.layer.frame = CGRect(x: self.view.frame.midX, y: self.view.frame.midY, width: 50, height: 50)
let tableViewBackgroundView = UIView()
tableViewBackgroundView.addSubview(imageView)
self.tableView.backgroundView = tableViewBackgroundView
There are a few points about swift that are pretty key:
1) The x and y parameters in CGRect.init(x:y:width:height:) don't refer to the center of the imageView. Instead, they are points in a coordinate system where (0, 0) is the Upper Left Corner of the view that the CGRect is being presented over, and
2) UIImageView actually inherits from UIView, so because of this you can just say
tableView.backgroundView = imageView
You shouldn't have to fiddle around with any CGRects, I believe this code should work just fine, although you may have to fiddle with different contentMode properties to get it to display how you like.
let imageView = UIImageView(image: UIImage(named: "logo"))
imageView.layer.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
imageView.layer.frame.midX = tableView.layer.frame.midX
imageView.layer.frame.midY = tableView.layer.frame.midY
tableView.backgroundView = imageView
I have a single image. And I have a collection view with banner images. Now,I need to combine these 2 images into single image without affecting their quality and height so that I could be able to download the merged image. I searched but couldn't find proper solutions for swift 3. My code is given as:
As per as your question You have to add two images and show up in a single UIImageView.
Here is a simple example of adding two images vertically and showing up in an UIImageView -
let topImage = UIImage(named: "image1.png") // 355 X 200
let bottomImage = UIImage(named: "image2.png") // 355 X 60
let size = CGSize(width: (topImage?.size.width)!, height: (topImage?.size.height)! + (bottomImage?.size.height)!)
UIGraphicsBeginImageContextWithOptions(size, false, 0.0)
topImage?.draw(in: CGRect(x:0, y:0, width:size.width, height: (topImage?.size.height)!))
bottomImage?.draw(in: CGRect(x:0, y:(topImage?.size.height)!, width: size.width, height: (bottomImage?.size.height)!))
let newImage:UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
// I've added an UIImageView, You can change as per your requirement.
let mergeImageView = UIImageView(frame: CGRect(x:0, y: 200, width: 355, height: 260))
// Here is your final combined images into a single image view.
mergeImageView.image = newImage
I hope it will help you to start with.
I need to draw an image like this
What provided is: green bubble with down arrow image(green bubble image already have border so I don't need to draw it) and center photo. And I need to draw white border around the photo + rounded corner it
This is the code I have so far:
let rect = CGRect(origin: .zero, size: CGSize(width: 60, height: 67))
let width = CGFloat(50)
let borderWidth: CGFloat = 1.0
let imageRect = CGRect(x: 5, y: 5, width: width, height: width)
let bubbleImg = #imageLiteral(resourceName: "pinGreen")
UIGraphicsBeginImageContextWithOptions(rect.size, false, 0.0)
let context = UIGraphicsGetCurrentContext()
bubbleImg.draw(in: rect)
let path = UIBezierPath(roundedRect: imageRect.insetBy(dx: borderWidth / 2, dy: borderWidth / 2), cornerRadius: width/2)
context!.saveGState()
path.addClip()
image.draw(in: imageRect)
context!.restoreGState()
UIColor.purple.setStroke()
path.lineWidth = borderWidth
path.stroke()
let roundedImage = UIGraphicsGetImageFromCurrentImageContext();
let img = roundedImage?.cgImage!
UIGraphicsEndImageContext();
and this is the result
Can anyone help me with this?
Is there anyway to design and get this type of image from xib file?
I will tell you the simplest way:
You need imageView1 for green bubble image, imageView2 for the photo (width=height). Their centers are the same.
The imageView2 has corner radius equal to its frame width/2.
Set border color of imageView2's layer to White, and border width is about 5 px. Dont forget to set maskToBounds=true.
Please try.
DaijDjan: this answer in one image (showing IB + code + app):
I have an UIView that its layer contents is an image.
let image = UIImage(names: "myImage")
layer.contents = image.CGImage
This image has a few colors.
Is there a way to change a specific color to any other color of my choice?
I found answers for changing the all of the colors in the image but not a specific one.
answer
You can't change specific color in PNG with transparent background, but.. i found the solution.
extension UIImage {
func maskWithColors(color: UIColor) -> UIImage? {
let maskingColors: [CGFloat] = [100, 255, 100, 255, 100, 255] // We should replace white color.
let maskImage = cgImage! //
let bounds = CGRect(x: 0, y: 0, width: size.width * 3, height: size.height * 3) // * 3, for best resolution.
let sz = CGSize(width: size.width * 3, height: size.height * 3) // Size.
var returnImage: UIImage? // Image, to return
/* Firstly we will remove transparent background, because
maskingColorComponents don't work with transparent images. */
UIGraphicsBeginImageContextWithOptions(sz, true, 0.0)
let context = UIGraphicsGetCurrentContext()!
context.saveGState()
context.scaleBy(x: 1.0, y: -1.0) // iOS flips images upside down, this fix it.
context.translateBy(x: 0, y: -sz.height) // and this :)
context.draw(maskImage, in: bounds)
context.restoreGState()
let noAlphaImage = UIGraphicsGetImageFromCurrentImageContext() // new image, without transparent elements.
UIGraphicsEndImageContext()
let noAlphaCGRef = noAlphaImage?.cgImage // get CGImage.
if let imgRefCopy = noAlphaCGRef?.copy(maskingColorComponents: maskingColors) { // Magic.
UIGraphicsBeginImageContextWithOptions(sz, false, 0.0)
let context = UIGraphicsGetCurrentContext()!
context.scaleBy(x: 1.0, y: -1.0)
context.translateBy(x: 0, y: -sz.height)
context.clip(to: bounds, mask: maskImage) // Remove background from image with mask.
context.setFillColor(color.cgColor) // set new color. We remove white color, and set red.
context.fill(bounds)
context.draw(imgRefCopy, in: bounds) // draw new image
let finalImage = UIGraphicsGetImageFromCurrentImageContext()
returnImage = finalImage! // YEAH!
UIGraphicsEndImageContext()
}
return returnImage
}
}
For call this function use code like this...
let image = UIImage(named: "Brush").maskWithColor(color: UIColor.red)
Result:
You can not change the image color... The only way is to change the image on any event or something...
Another variant is to create one image with transparent color, and set the background color of the view or something where you put the image...