How can I add padding between an UIImageView and its border?
Img.layer.cornerRadius = Img.bounds.width / 2
Img.layer.borderWidth = 2
Img.layer.borderColor = UIColor.blue.cgColor
Img.clipsToBounds = true
Like this:
As per the this link
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let image = UIImage(named: "imagename")!
let imageView = UIImageView(image: image.imageWithInsets(insets: UIEdgeInsetsMake(30, 30, 30, 30)))
imageView.frame = CGRect(x: 0, y: 0, width: 300, height: 400)
imageView.backgroundColor = UIColor.gray
imageView.layer.borderWidth = 2
imageView.layer.borderColor = UIColor.blue.cgColor
view.addSubview(imageView)
}
}
extension UIImage {
func imageWithInsets(insets: UIEdgeInsets) -> UIImage? {
UIGraphicsBeginImageContextWithOptions(
CGSize(width: self.size.width + insets.left + insets.right,
height: self.size.height + insets.top + insets.bottom), false, self.scale)
let _ = UIGraphicsGetCurrentContext()
let origin = CGPoint(x: insets.left, y: insets.top)
self.draw(at: origin)
let imageWithInsets = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return imageWithInsets
}
}
For adding padding to the UIImage of UIImageView, use the below piece of code in Swift
let padding: CGFloat = 6
myImageView.contentMode = .scaleAspectFill
myImageView.image = UIImage(named: "myImage.png").resizableImage(withCapInsets: UIEdgeInsets(top: padding, left: padding, bottom: padding, right: padding), resizingMode: .stretch)
Related
I would like to convert two images into one image with custom design.
The expected image is a snapshot of my UICollectionViewCell, not a UIImage actually.
I copied the layout codes from my custom UICVCell.swift file and tried to render the view into UIImage, but the result image is what you can see below.
I searched through a lot of questions in SOF, but most of it was about 'How you can render a UIView into a UIImage.'
I've tried drawing too, but had the same messed up result.
Can anybody tell me what's the problem?
I would really appreciate your help, it's my first question in SOF.
I might cry in a minute or two, literally...
class ViewController: UIViewController {
private var imageView: UIImageView = {
let iv = UIImageView()
iv.contentMode = .scaleAspectFit
iv.clipsToBounds = true
return iv
}()
func createBubbleImage(images: [UIImage?]) -> UIImage? {
switch images.count {
case 1:
return images[0]
case 2:
let newView = UIView(frame: .init(x: 0, y: 0, width: 300, height: 300))
let size = newView.frame.width
let iv0 = UIImageView(image: images[0])
iv0.contentMode = .scaleAspectFit
iv0.clipsToBounds = true
let iv1 = UIImageView(image: images[1])
iv1.contentMode = .scaleAspectFit
iv1.clipsToBounds = true
newView.addSubview(iv0)
iv0.anchor(top: newView.topAnchor, left: newView.leftAnchor, paddingTop: size * 0.04, paddingLeft: size * 0.04, width: size * 0.56, height: size * 0.56)
newView.addSubview(iv1)
iv1.anchor(bottom: newView.bottomAnchor, right: newView.rightAnchor, paddingBottom: size * 0.04, paddingRight: size * 0.04, width: size * 0.56, height: size * 0.56)
iv0.layer.cornerRadius = size * 0.28
iv1.layer.cornerRadius = size * 0.28
let renderer = UIGraphicsImageRenderer(bounds: newView.bounds)
return renderer.image { ctx in
newView.layer.render(in: ctx.cgContext)
}
default:
return UIImage(named: "logo")
}
}
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
view.addSubview(imageView)
imageView.center(inView: view)
imageView.setDimensions(width: 300, height: 300)
imageView.image = createBubbleImage(images: [UIImage(named: "0"), UIImage(named: "1")])
}
}
Expected Image
Result Image
Do the following:
Remove the code lines that have the anchor method.
Initiate the iv0 and iv1 with UIImageView(frame: ...)
Add iv0.image = images[0] and iv1.image = images[1]
I also increased the radius a little bit because in my test device the images were not completely circular.
The code should look like this:
func createBubbleImage(images: [UIImage?]) -> UIImage? {
switch images.count {
case 1:
return images[0]
case 2:
let newView = UIView(frame: .init(x: 0, y: 0, width: 300, height: 300))
let size = newView.frame.width
let iv0 = UIImageView(frame: .init(x: 0, y: 0, width: 200, height: 200))
iv0.image = images[0]
iv0.contentMode = .scaleAspectFit
iv0.clipsToBounds = true
let iv1 = UIImageView(frame: .init(x: 100, y: 100, width: 200, height: 200))
iv1.image = images[1]
iv1.contentMode = .scaleAspectFit
iv1.clipsToBounds = true
newView.addSubview(iv0)
newView.addSubview(iv1)
iv0.layer.cornerRadius = size * 0.35
iv1.layer.cornerRadius = size * 0.35
let renderer = UIGraphicsImageRenderer(bounds: newView.bounds)
return renderer.image { ctx in
newView.layer.render(in: ctx.cgContext)
}
default:
return UIImage(named: "logo")
}
}
With it, the result is the following:
I had to take a screenshot from your "expected image", that's why the images look like zoomed in. You can play with the UIImageView(frame: ...) part to adjust the two images as you want (I didn't played enough to avoid that cut in the edges, but it is possible with the right measures).
Remark: the x and y values in the UIImageView frame are the horizontal and vertical distances from the top-left corner of newView to the top-left corner of your UIImageView, respectively.
So I added a UIImageView to the right of my UITextField, but I need to add a little bit of padding to the right side so that it doesn't anchor all the way to the right. I tried adding a custom frame but that didn't work, so I'm not too sure how to go about getting that padding. Any help would be much appreaciated.
See TextField Example Here
let titleField : UITextField = {
let titleField = UITextField()
titleField.placeholder = "Title"
titleField.textAlignment = .center
titleField.backgroundColor = .white
titleField.addDoneCancelToolbar()
var imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 10, height: 10))
let image = UIImage(systemName: "exclamationmark.circle")?.withTintColor(.systemRed, renderingMode: .alwaysOriginal)
imageView.image = image
titleField.rightView = imageView
titleField.rightViewMode = .always
// titleField.rightView?.isHidden = true
return titleField
}()
Subclass UITextField and override https://developer.apple.com/documentation/uikit/uitextfield/1619638-rightviewrect.
Just add the extension :
extension UITextField {
func rightImage(_ image: UIImage?, imageWidth: CGFloat, padding: CGFloat) {
let imageView = UIImageView()
imageView.frame = CGRect(x: padding + 2, y: 0, width: imageWidth, height: frame.height)
imageView.contentMode = .scaleAspectFit
imageView.image = image
let containerView = UIView(frame: CGRect(x: 0, y: 0, width: imageWidth + padding , height: frame.height))
containerView.addSubview(imageView)
rightView = containerView
rightViewMode = .always
}
}
To use it :
if let image = UIImage(named: imagename + ".png") {
titlefield.rightImage(image, imageWidth: 30, padding: 5)
}
I got a UITableView with default cell styles. (set to .subtitle style)
I want to make its UIImageView circular.
cell.imageView.layer.borderWidth = 1
cell.imageView.layer.masksToBounds = false
cell.imageView.layer.borderColor = UIColor.white.cgColor
cell.imageView.layer.cornerRadius = profileImageView.frame.size.width/2
cell.imageView.clipsToBounds = true
this would not work at this situation!
I found the right way thanks to https://stackoverflow.com/a/50462058/10489699 .
let itemSize = CGSize.init(width: 50, height: 50)
UIGraphicsBeginImageContextWithOptions(itemSize, false, UIScreen.main.scale)
let imageRect = CGRect.init(origin: CGPoint.zero, size: itemSize)
cell.imageView?.image!.draw(in: imageRect)
cell.imageView?.image! = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
cell.imageView?.layer.cornerRadius = (itemSize.width) / 2
cell.imageView?.clipsToBounds = true
Don't try if let image = cell.imageView?.image! {...} , I don't know why but it hits the UIImageView !
you can use this code
public extension UIView {
func round() {
let width = bounds.width < bounds.height ? bounds.width : bounds.height
let mask = CAShapeLayer()
mask.path = UIBezierPath(ovalIn: CGRect(x: bounds.midX - width / 2, y: bounds.midY - width / 2, width: width, height: width)).cgPath
self.layer.mask = mask
}
}
and you can use like this:
profileImageView.round()
I want to change the position of the image title of the navigation bar after changing the height of navigation, but it doesn't work. I'm a rookie，please help me, thank you guys!
override func viewDidAppear(_ animated: Bool)
{
NavigationBarHeight()
}
func NavigationBarHeight() {
for subview in (self.navigationController?.navigationBar.subviews)! {
if NSStringFromClass(subview.classForCoder).contains("BarBackground") {
var subViewFrame: CGRect = subview.frame
subViewFrame.size.height = 75
subview.frame = subViewFrame
}
}
}
func addNavBarImage() {
let navController = navigationController
let image = UIImage(named: "文字logo")
let imageView = UIImageView(image: image)
let bannerWidth = navController?.navigationBar.frame.size.width
let bannerHeight = navController?.navigationBar.frame.size.height
let bannerX = bannerWidth! / 2 - image!.size.width / 2
let bannerY = bannerHeight! / 2 - image!.size.height / 2
imageView.frame = CGRect(x: bannerX, y: bannerY, width: bannerWidth!/2, height: bannerHeight! / 2)
imageView.contentMode = .scaleAspectFit
navigationItem.titleView = imageView
}
Well you can use this to change :-
func title_Logo() {
let imageView = UIImageView(image: #imageLiteral(resourceName: "icon-logo"))
imageView.frame = CGRect(x: 0, y: 0, width: 170, height: 30)
imageView.contentMode = .scaleAspectFit
let titleView = UIView(frame: CGRect(x: 0, y: 0, width: 170, height: 30))
titleView.addSubview(imageView)
titleView.backgroundColor = .clear
self.navigationItem.titleView = titleView
}
and just call the function where you want to use
I want to globally change the navigation bar back button, so I have this:
UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(-100, -5000), forBarMetrics: .Default)
var backImage: UIImage = UIImage(named: "BackButton")!
backImage = backImage.imageWithAlignmentRectInsets(UIEdgeInsetsMake(0, 0, 0, 20))
UINavigationBar.appearance().backIndicatorImage = backImage
UINavigationBar.appearance().backIndicatorTransitionMaskImage = backImage
But the back image is too close to the left of the screen. How do I move it farther to the right?
Just adjust the actual image.
extension UIImage {
func imageWithInsets(insets: UIEdgeInsets) -> UIImage {
UIGraphicsBeginImageContextWithOptions(
CGSizeMake(self.size.width + insets.left + insets.right,
self.size.height + insets.top + insets.bottom), false, self.scale)
let context = UIGraphicsGetCurrentContext()
let origin = CGPoint(x: insets.left, y: insets.top)
self.drawAtPoint(origin)
let imageWithInsets = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return imageWithInsets
}
}
For Swift 4:
extension UIImage {
func withInsets(_ insets: UIEdgeInsets) -> UIImage? {
UIGraphicsBeginImageContextWithOptions(
CGSize(width: size.width + insets.left + insets.right,
height: size.height + insets.top + insets.bottom),
false,
self.scale)
let origin = CGPoint(x: insets.left, y: insets.top)
self.draw(at: origin)
let imageWithInsets = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return imageWithInsets
}
}
You need to adjust the left position on UIEdgeInsetsMake.
You are already calling it here:
backImage = backImage.imageWithAlignmentRectInsets(UIEdgeInsetsMake(0, 0, 0, 20))
Like so:
backImage = backImage.imageWithAlignmentRectInsets(UIEdgeInsetsMake(0, -50, 0, 50))