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 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 have an UIScrollView and an UILabel on a ViewController. If the user arrives at the last page of the scrollView, the Label should be hidden. How can I do that? Here is my unfinished code:
swipeLabel.center.x = self.view.frame.width + 30
self.comingSoonLabel.isHidden = false
self.scrollView.frame = CGRect(x: 0, y: 0, width: self.scrollView.frame.width, height: self.scrollView.frame.height)
let scrollviewHeight = self.scrollView.frame.height
let scrollviewWidth = self.scrollView.frame.width
let imgOne = UIImageView(frame: CGRect(x: 0, y: 0, width: scrollviewWidth, height: scrollviewHeight))
let imgTwo = UIImageView(frame: CGRect(x: scrollviewWidth, y: 0, width: scrollviewWidth, height: scrollviewHeight))
let feedbackView = UIView(frame: CGRect(x: scrollviewWidth*4, y: 0, width: scrollviewWidth, height: scrollviewHeight))
imgOne.image = UIImage(named: "preview1")
imgTwo.image = UIImage(named: "preview2")
self.scrollView.addSubview(imgOne)
self.scrollView.addSubview(imgTwo)
self.scrollView.addSubview(feedbackView)
self.addChildFeedBack(feedbackView: feedbackView)
self.scrollView.contentSize = CGSize(width: self.scrollView.frame.width * 3, height: self.scrollView.frame.height)
self.scrollView.isPagingEnabled = true
}
func addChildFeedBack(feedbackView: UIView){
let contestStoryboard = UIStoryboard(name: "feedback", bundle: nil)
let testVC = contestStoryboard.instantiateViewController(withIdentifier: "FeedbackViewController") as! FeedbackViewController
testVC.view.frame = feedbackView.bounds
feedbackView.addSubview(testVC.view)
self.addChildViewController(testVC)
testVC.didMove(toParentViewController: self)
self.comingSoonLabel.isHidden = true
}
You can get pageNumber using scrollview's delegate method.
Note -You need to assign delegate of scrollview and conform that delegate also.
scrollview.delegate = self //assign
class testClass: UIViewController, UIScrollViewDelegate // conform
Delegate
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let pageNumber = round(scrollView.contentOffset.x / scrollView.frame.size.width)
if pageNumber == 3{
// hide your label here
}
// do you logic related to last page
}
I want to customize my app's look by using a logo image as the navigation bar's title, instead of plain text. When I use this code
let logo = UIImage(named: "logo.png")
self.navigationItem.titleView = logo;
I get the error "UIImage is not convertible to UIView". How can I do this correctly?
Put it inside an UIImageView
let logo = UIImage(named: "logo.png")
let imageView = UIImageView(image:logo)
self.navigationItem.titleView = imageView
I use this. It works in iOS 8
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let image = UIImage(named: "YOURIMAGE")
navigationItem.titleView = UIImageView(image: image)
}
And here is an example how you can do it with CGRect.
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 38, height: 38))
imageView.contentMode = .ScaleAspectFit
let image = UIImage(named: "YOURIMAGE")
imageView.image = image
navigationItem.titleView = imageView
}
Hope this will help.
For swift 4 and you can adjust imageView size
let logoContainer = UIView(frame: CGRect(x: 0, y: 0, width: 270, height: 30))
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 270, height: 30))
imageView.contentMode = .scaleAspectFit
let image = UIImage(named: "your_image")
imageView.image = image
logoContainer.addSubview(imageView)
navigationItem.titleView = logoContainer
I tried #Jack's answer above, the logo did appear however the image occupied the whole Navigation Bar. I wanted it to fit.
Swift 4, Xcode 9.2
1.Assign value to navigation controller, UIImage. Adjust size by dividing frame and Image size.
func addNavBarImage() {
let navController = navigationController!
let image = UIImage(named: "logo-signIn6.png") //Your logo url here
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, height: bannerHeight)
imageView.contentMode = .scaleAspectFit
navigationItem.titleView = imageView
}
Add the function right under viewDidLoad()
addNavBarImage()
Note on the image asset. Before uploading, I adjusted the logo with extra margins rather than cropped at the edges.
Final result:
You can use custom UINavigationItem so, you only need to change "Navigation Item" as YourCustomClass on the Main.storyboard.
In Swift 3
class FixedImageNavigationItem: UINavigationItem {
private let fixedImage : UIImage = UIImage(named: "your-header-logo.png")!
private let imageView : UIImageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 50, height: 37.5))
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
imageView.contentMode = .scaleAspectFit
imageView.image = fixedImage
self.titleView = imageView
}
}
Here is a handy function for Swift 4.2, shows an image with title text:-
override func viewDidLoad() {
super.viewDidLoad()
//Sets the navigation title with text and image
self.navigationItem.titleView = navTitleWithImageAndText(titleText: "Dean Stanley", imageName: "online")
}
func navTitleWithImageAndText(titleText: String, imageName: String) -> UIView {
// Creates a new UIView
let titleView = UIView()
// Creates a new text label
let label = UILabel()
label.text = titleText
label.sizeToFit()
label.center = titleView.center
label.textAlignment = NSTextAlignment.center
// Creates the image view
let image = UIImageView()
image.image = UIImage(named: imageName)
// Maintains the image's aspect ratio:
let imageAspect = image.image!.size.width / image.image!.size.height
// Sets the image frame so that it's immediately before the text:
let imageX = label.frame.origin.x - label.frame.size.height * imageAspect
let imageY = label.frame.origin.y
let imageWidth = label.frame.size.height * imageAspect
let imageHeight = label.frame.size.height
image.frame = CGRect(x: imageX, y: imageY, width: imageWidth, height: imageHeight)
image.contentMode = UIView.ContentMode.scaleAspectFit
// Adds both the label and image view to the titleView
titleView.addSubview(label)
titleView.addSubview(image)
// Sets the titleView frame to fit within the UINavigation Title
titleView.sizeToFit()
return titleView
}
this worked for me in Sept 2015 - Hope this helps someone out there.
// 1
var nav = self.navigationController?.navigationBar
// 2 set the style
nav?.barStyle = UIBarStyle.Black
nav?.tintColor = UIColor.yellowColor()
// 3
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
imageView.contentMode = .ScaleAspectFit
// 4
let image = UIImage(named: "logo.png")
imageView.image = image
// 5
navigationItem.titleView = imageView
I have written this for iOS 10 & iOS 11 and it worked for me:
extension UINavigationBar {
func setupNavigationBar() {
let titleImageWidth = frame.size.width * 0.32
let titleImageHeight = frame.size.height * 0.64
var navigationBarIconimageView = UIImageView()
if #available(iOS 11.0, *) {
navigationBarIconimageView.widthAnchor.constraint(equalToConstant: titleImageWidth).isActive = true
navigationBarIconimageView.heightAnchor.constraint(equalToConstant: titleImageHeight).isActive = true
} else {
navigationBarIconimageView = UIImageView(frame: CGRect(x: 0, y: 0, width: titleImageWidth, height: titleImageHeight))
}
navigationBarIconimageView.contentMode = .scaleAspectFit
navigationBarIconimageView.image = UIImage(named: "image")
topItem?.titleView = navigationBarIconimageView
}
}
Swift 5.1+, Xcode 13+
Sometimes if your image is in high resolution then, imageView shifts from centre, I would suggest using this method
lazy var navigationTitleImageView = UIImageView()
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationTitleImageView.image = logo
self.navigationTitleImageView.contentMode = .scaleAspectFit
self.navigationTitleImageView.translatesAutoresizingMaskIntoConstraints = false
if let navC = self.navigationController{
navC.navigationBar.addSubview(self.navigationTitleImageView)
self.navigationTitleImageView.centerXAnchor.constraint(equalTo: navC.navigationBar.centerXAnchor).isActive = true
self.navigationTitleImageView.centerYAnchor.constraint(equalTo: navC.navigationBar.centerYAnchor, constant: 0).isActive = true
self.navigationTitleImageView.widthAnchor.constraint(equalTo: navC.navigationBar.widthAnchor, multiplier: 0.2).isActive = true
self.navigationTitleImageView.heightAnchor.constraint(equalTo: navC.navigationBar.widthAnchor, multiplier: 0.088).isActive = true
}
}
and viewWillDisappear()
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
self.navigationTitleImageView.removeFromSuperview()
}
or else just reduce the image size
If you'd prefer to use autolayout, and want a permanent fixed image in the navigation bar, that doesn't animate in with each screen, this solution works well:
class CustomTitleNavigationController: UINavigationController {
override func viewDidLoad() {
super.viewDidLoad()
let logo = UIImage(named: "MyHeaderImage")
let imageView = UIImageView(image:logo)
imageView.contentMode = .scaleAspectFit
imageView.translatesAutoresizingMaskIntoConstraints = false
navigationBar.addSubview(imageView)
navigationBar.addConstraint (navigationBar.leftAnchor.constraint(equalTo: imageView.leftAnchor, constant: 0))
navigationBar.addConstraint (navigationBar.rightAnchor.constraint(equalTo: imageView.rightAnchor, constant: 0))
navigationBar.addConstraint (navigationBar.topAnchor.constraint(equalTo: imageView.topAnchor, constant: 0))
navigationBar.addConstraint (navigationBar.bottomAnchor.constraint(equalTo: imageView.bottomAnchor, constant: 0))
}
Programmatically could be done like this.
private var imageView: UIView {
let bannerWidth = navigationBar.frame.size.width * 0.5 // 0.5 its multiplier to get correct image width
let bannerHeight = navigationBar.frame.size.height
let view = UIView()
view.backgroundColor = .clear
view.frame = CGRect(x: 0, y: 0, width: bannerWidth, height: bannerHeight)
let image = UIImage(named: "your_image_name")
let imageView = UIImageView(image: image)
imageView.contentMode = .scaleAspectFit
imageView.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height)
view.addSubview(imageView)
return view
}
The just change titleView
navigationItem.titleView = imageView
let's do try and checkout
let image = UIImage(named: "Navbar_bg.png")
navigationItem.titleView = UIImageView(image: image)
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
imageView.contentMode = .ScaleAspectFit
let imageView = UIImageView(frame: (CGRect(x: 0, y: 0, width: 40, height:
40)))
imageView.contentMode = .scaleAspectFit
let image = UIImage (named: "logo") // logo is your NPG asset
imageView.image = image
self.navigationItem.titleView = imageView
Works for me in swift 4 (square image 40x40)
let imageView = UIImageView()
imageView.frame.size.width = 40
imageView.frame.size.height = 40
imageView.contentMode = .scaleAspectFit
let image = UIImage(named: "YOUR_IMAGE_NAME")
imageView.image = image
navigationItem.titleView = imageView
If you want other measures, try
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 50, height: 100.5)))
imageView.contentMode = .scaleAspectFit
let image = UIImage(named: "YOUR_IMAGE_NAME")
imageView.image = image
navigationItem.titleView = imageView
I hope it serves you. It works for me.
Objective-C version:
//create the space for the image
UIImageView *myImage = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 256, 144)];
//bind the image with the ImageView allocated
myImage.image = [UIImage imageNamed:#"logo.png"];
//add image into imageview
_myNavigationItem.titleView = myImage;
Just in case someone (like me) had arrived here looking for the answer in Objective-C.
This worked for me... try it
let image : UIImage = UIImage(named: "LogoName")
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 25, height: 25))
imageView.contentMode = .scaleAspectFit
imageView.image = image
navigationItem.titleView = imageView
In order to get the image view with the proper size and in the center, you should use the following approach:
let width = 120 // choose the image width
let height = 20 // choose the image height
let titleView = UIView(frame: CGRect(x: 0, y: 0, width: view.bounds.width, height: 44)) //44 is the standard size of the top bar
let imageView = UIImageView(frame: CGRect(x: (view.bounds.width - width)/2, y: (44 - height)/2, width: width, height: height))
imageView.contentMode = .scaleAspectFit //choose other if it makes sense
imageView.image = UIImage(named: "your_image_name")
titleView.addSubview(imageView)
navigationItem.titleView = titleView