I created a custom bar but I can't change the location of the image and text in the itembar itself.
What I have:
and here is what I want to get:
How I initialize barItems:
private func initializeTabBar() {
let mainNavigationController = MainNavigationController()
mainNavigationController.tabBarItem = UITabBarItem(title: "Explorer", image: UIImage(named: "dot"), tag: 0)
let mainCoordinator = coordinatorFactory.makeMainCoordinator(with: Router(rootController: mainNavigationController))
let BasketViewController = BusketViewController()
BasketViewController.tabBarItem = UITabBarItem(title: "", image: UIImage(named: "busket"), tag: 1)
let FavoriteViewController = FavoriteViewController()
FavoriteViewController.tabBarItem = UITabBarItem(title: "", image: UIImage(named: "heart"), tag: 2)
let ProfileViewController = ProfileViewController()
ProfileViewController.tabBarItem = UITabBarItem(title: "", image: UIImage(named: "profile"), tag: 3)
tabBarController.viewControllers = [mainNavigationController,BasketViewController,FavoriteViewController,ProfileViewController]
tabbar setup:
func setup() {
tabBar.itemWidth = tabBar.bounds.width / 10
tabBar.itemPositioning = .centered
tabBar.tintColor = AppColors.white
tabBar.unselectedItemTintColor = AppColors.white
}
func setupBackground() {
let positionX: CGFloat = 0
let PositionY: CGFloat = 8
let width = tabBar.bounds.width - positionX * 2
let height = tabBar.bounds.height + PositionY * 2
let rounderLayer = CAShapeLayer()
let bezierPath = UIBezierPath(
roundedRect: CGRect(x: positionX, y: tabBar.bounds.minY - PositionY, width: width, height: height), cornerRadius: height / 2 )
rounderLayer.path = bezierPath.cgPath
rounderLayer.fillColor = AppColors.darkBlue.cgColor
tabBar.layer.insertSublayer(rounderLayer, at: 0)
}
I will accept all advice or solutions.
I check if the image is vertical or horizontal. If it is horizontal, I rotate it:
#IBOutlet private weak var img: UIImageView!
img.image = file.image
let imageSize = file.image?.size
let imgWidth = imageSize?.width ?? 0
let imgHeight = imageSize?.height ?? 0
if imgWidth > imgHeight {
print("IMG HORIZONTAL")
imgDetail.transform = imgDetail.transform.rotated(by: .pi / 2)
} else {
print("IMG VERTICAL")
}
But it leaves me a space around the image. I would like it to be at the maximum size of the UIImageView.
Try this, declare your imageView:
let YourImageView: UIImageView = {
let iv = UIImageView()
iv.image = UIImage(named: "myImage")?.withRenderingMode(.alwaysOriginal)
iv.backgroundColor = .clear
iv.contentMode = .scaleAspectFit
iv.isUserInteractionEnabled = true
iv.clipsToBounds = true
iv.translatesAutoresizingMaskIntoConstraints = false
return iv
}()
in viewDidLoad set if statement and call setupConstraints:
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
guard let imgWidth = YourImageView.image?.size.width else { return }
guard let imgHeight = YourImageView.image?.size.height else { return }
if imgWidth > imgHeight {
print("IMG HORIZONTAL")
guard let image = YourImageView.image else { return }
let newImage = image.rotate(radians: .pi / 2) // image rotation
YourImageView.image = newImage
} else {
print("IMG VERTICAL")
}
setupConstraints()
}
set up constraints
fileprivate func setupConstraints() {
view.addSubview(YourImageView)
YourImageView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
YourImageView.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
YourImageView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
YourImageView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
}
write image extension
extension UIImage {
func rotate(radians: Float) -> UIImage? {
var newSize = CGRect(origin: CGPoint.zero, size: self.size).applying(CGAffineTransform(rotationAngle: CGFloat(radians))).size
// Trim off the extremely small float value to prevent core graphics from rounding it up
newSize.width = floor(newSize.width)
newSize.height = floor(newSize.height)
UIGraphicsBeginImageContextWithOptions(newSize, false, self.scale)
guard let context = UIGraphicsGetCurrentContext() else { return UIImage()}
// Move origin to middle
context.translateBy(x: newSize.width/2, y: newSize.height/2)
// Rotate around middle
context.rotate(by: CGFloat(radians))
// Draw the image at its center
self.draw(in: CGRect(x: -self.size.width/2, y: -self.size.height/2, width: self.size.width, height: self.size.height))
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage
}
}
this is the result normal (without image rotate extension call) and rotated (with image rotate extension call):
I have a UIImageView which is loaded by an ImagePicker with a photo (3k x 4k sized) which is filled into the view using AspectFit mode. I then pan and zoom the image with GestureRecognizers which adjust the transform scale and translation of the view. This works well, here is the code:
#objc private func startZooming(_ sender: UIPinchGestureRecognizer) {
let scaleResult = sender.view?.transform.scaledBy(x: sender.scale, y: sender.scale)
guard let scale = scaleResult, scale.a > 1, scale.d > 1 else { return }
sender.view?.transform = scale
sender.scale = 1
}
#objc private func startPanning(_ sender: UIPanGestureRecognizer) {
let translate = sender.translation(in: mainImageView)
let center = mainImageView.center
mainImageView.center = CGPoint(x: center.x + translate.x, y: center.y + translate.y)
self.currImageTranslation.x += translate.x
self.currImageTranslation.y += translate.y
sender.setTranslation(CGPoint(x: 0, y: 0), in: mainImageView)
}
My problem is that I need the resulting visual result of the transform as a CGImage to feed into an visual inference engine. When I get the image from the UIImageView:
let image = myUIImageView.image // I get the original untransformed image
when I try:
UIGraphicsBeginImageContextWithOptions(image!.size, false, 0.0)
myImageView.layer.render(in: UIGraphicsGetCurrentContext()!)
let newImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
newImage is also just the original image (untransformed)
when I try:
let rect = mainImageView.bounds
let scale = UIScreen.main.scale
var t = self.currImageTranslation
let tScale = mainImageView.transform.a
let zoomOffsetFactorX = ((t.x / rect.size.width) * tScale)
let zoomOffsetFactorY = ((t.y / rect.size.height) * tScale)
t.x = t.x - zoomOffsetFactorX
t.y = (t.y + 20.0) + zoomOffsetFactorY
// create a context
UIGraphicsBeginImageContextWithOptions(rect.size, false, 0.0)
let context = UIGraphicsGetCurrentContext()!
let transform = mainImageView.transform
let imrect = CGRect(origin: t, size: rect.size)
context.concatenate(transform)
let tempImage = mainImageView.image
tempImage!.draw(in: imrect)
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
the newImage translates properly, but only at scale = 1.0, zooming with or without scaling creates fractional images, i.e., clipped to the zero, zero origin.
I would like to generate a UIImage of just what the user sees on the screen in that ImageView. Can anyone help?
With #DonMag's generous suggestions, I tried the following:
func enableZoom() {
let pinchGesture = UIPinchGestureRecognizer(target: self,
action: #selector(startZooming(_:)))
let panGesture = UIPanGestureRecognizer(target: self,
action: #selector(startPanning(_:)))
containerView.isUserInteractionEnabled = true
containerView.addGestureRecognizer(pinchGesture)
containerView.addGestureRecognizer(panGesture)
}
#objc private func startZooming(_ sender: UIPinchGestureRecognizer) {
let scaleResult = sender.view?.transform.scaledBy(x: sender.scale, y: sender.scale)
guard let scale = scaleResult, scale.a > 1, scale.d > 1 else { return }
sender.view?.transform = scale
newImage()
sender.scale = 1
}
#objc private func startPanning(_ sender: UIPanGestureRecognizer) {
let translate = sender.translation(in: mainImageView)
let center = mainImageView.center
mainImageView.center = CGPoint(x: center.x + translate.x, y: center.y + translate.y)
self.currImageTranslation.x += translate.x
self.currImageTranslation.y += translate.y
sender.setTranslation(CGPoint(x: 0, y: 0), in: mainImageView)
newImage()
}
//MARK:- create cropped/panned image and infer
func newImage() -> Void {
let format = UIGraphicsImageRendererFormat()
// we want a 1:1 points-to-pixels output
format.scale = 1
let renderer = UIGraphicsImageRenderer(size: containerView.bounds.size, format: format)
let image = renderer.image { ctx in
containerView.drawHierarchy(in: containerView.bounds, afterScreenUpdates: true)
}
self.currCGImage = image.cgImage
//repeatInference() // runs only once every 0.3 s
return
}
Now the "newImage" correctly reflects the translations created by the panGesture, but seemingly ignores the pinchGesture changes in scale. The drawHierarchy seems to be ignoring the imposed transforms in the UIView. Where am I going wrong?
I'm not entirely sure what you're doing with your transform code, but this may work for you -- and is much simpler...
If I understand correctly, you have a UIImageView with .aspectFit and it is in a UIView "container" and you apply a scale and translate transform to the image view:
let format = UIGraphicsImageRendererFormat()
// we want a 1:1 points-to-pixels output
format.scale = 1
let renderer = UIGraphicsImageRenderer(size: containerView.bounds.size, format: format)
let image = renderer.image { ctx in
containerView.drawHierarchy(in: containerView.bounds, afterScreenUpdates: true)
}
Here is a complete example implementation:
class TransImageViewController: UIViewController {
let containerView = UIView()
let imageView = UIImageView()
override func viewDidLoad() {
super.viewDidLoad()
guard let img = UIImage(named: "bkg_2400x1600") else {
fatalError("Could not load the image!!!")
}
let stack = UIStackView()
stack.spacing = 20
stack.distribution = .fillEqually
let b1 = UIButton()
let b2 = UIButton()
[b1, b2].forEach { b in
b.backgroundColor = .red
b.setTitleColor(.white, for: .normal)
b.setTitleColor(.gray, for: .highlighted)
}
b1.setTitle("Transform", for: [])
b2.setTitle("Capture", for: [])
stack.addArrangedSubview(b1)
stack.addArrangedSubview(b2)
[stack, containerView, imageView].forEach {
$0.translatesAutoresizingMaskIntoConstraints = false
}
view.addSubview(stack)
view.addSubview(containerView)
containerView.addSubview(imageView)
let g = view.safeAreaLayoutGuide
NSLayoutConstraint.activate([
// buttons stack at top
stack.topAnchor.constraint(equalTo: g.topAnchor, constant: 20.0),
stack.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 40.0),
stack.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: -40.0),
// container 400x500 centered
containerView.widthAnchor.constraint(equalToConstant: 400),
containerView.heightAnchor.constraint(equalToConstant: 500),
containerView.centerXAnchor.constraint(equalTo: g.centerXAnchor),
containerView.centerYAnchor.constraint(equalTo: g.centerYAnchor),
// imageView constrained all 4 sides to container
imageView.topAnchor.constraint(equalTo: containerView.topAnchor),
imageView.leadingAnchor.constraint(equalTo: containerView.leadingAnchor),
imageView.trailingAnchor.constraint(equalTo: containerView.trailingAnchor),
imageView.bottomAnchor.constraint(equalTo: containerView.bottomAnchor),
])
containerView.clipsToBounds = true
imageView.contentMode = .scaleAspectFit
imageView.image = img
view.backgroundColor = .blue
containerView.backgroundColor = .yellow
imageView.backgroundColor = .orange
b1.addTarget(self, action: #selector(self.doTransform), for: .touchUpInside)
b2.addTarget(self, action: #selector(self.grabImage), for: .touchUpInside)
}
#objc func doTransform() -> Void {
var t = CGAffineTransform.identity
t = t.scaledBy(x: 4.0, y: 4.0)
t = t.translatedBy(x: -120, y: 40)
imageView.transform = t
}
#objc func grabImage() -> Void {
let format = UIGraphicsImageRendererFormat()
// we want a 1:1 points-to-pixels output
format.scale = 1
let renderer = UIGraphicsImageRenderer(size: containerView.bounds.size, format: format)
let image = renderer.image { ctx in
containerView.drawHierarchy(in: containerView.bounds, afterScreenUpdates: true)
}
// do what you want with the resulting image
print("Resulting image size:", image.size)
}
}
Using this image as my "bkg_2400x1600" image asset:
The above code starts like this (my "container" view is 400x500 pts):
Taping the "Transform" button applies .scaledBy(x: 4.0, y: 4.0) and .translatedBy(x: -120, y: 40):
and then tapping "Capture" gives me this 400x500 pixel image:
#DonMag put me on the right track. However, to get the correct scaling in the grabbed image, I needed to apply the scaleBy transform to the UIImageView, not the containerview. Also, I needed to set the format scale to the current scale factor from the pinchGesture. Here is the working version:
func enableZoom() {
let pinchGesture = UIPinchGestureRecognizer(target: self, action: #selector(startZooming(_:)))
let panGesture = UIPanGestureRecognizer(target: self, action: #selector(startPanning(_:)))
containerView.isUserInteractionEnabled = true
containerView.addGestureRecognizer(pinchGesture)
containerView.addGestureRecognizer(panGesture)
}
#objc private func startZooming(_ sender: UIPinchGestureRecognizer) {
// let scaleResult = sender.view?.transform.scaledBy(x: sender.scale, y: sender.scale)
// guard let scale = scaleResult, scale.a > 1, scale.d > 1 else { return }
// sender.view?.transform = scale
let scaleResult = mainImageView?.transform.scaledBy(x: sender.scale, y: sender.scale)
guard let scale = scaleResult, scale.a > 1, scale.d > 1 else { return }
mainImageView.transform = scale
currImageScale = sender.scale
newImage()
sender.scale = 1
}
#objc private func startPanning(_ sender: UIPanGestureRecognizer) {
let translate = sender.translation(in: mainImageView)
let center = mainImageView.center
mainImageView.center = CGPoint(x: center.x + translate.x, y: center.y + translate.y)
self.currImageTranslation.x += translate.x
self.currImageTranslation.y += translate.y
sender.setTranslation(CGPoint(x: 0, y: 0), in: mainImageView)
newImage()
}
//MARK:- create cropped/panned image and infer
func newImage() -> Void {
let format = UIGraphicsImageRendererFormat()
// we want a 1:1 points-to-pixels output
format.scale = currImageScale
let renderer = UIGraphicsImageRenderer(size: containerView.bounds.size, format: format)
let image = renderer.image { ctx in
containerView.drawHierarchy(in: containerView.bounds, afterScreenUpdates: true)
}
self.currCGImage = image.cgImage
repeatInference() // runs only once every 0.3 s
return
}
I want to run CAEmitterLayer only once, I was thinking of stopping birthRate but I can't do it. What I want is for it to run only once when tapping on the screen. I've been trying with delegates but I can't get it to work. And could you please tell me if my code is efficient.
import UIKit
import PlaygroundSupport
class Emitter {
static func get(with image: UIImage) -> CAEmitterLayer {
let emitter = CAEmitterLayer()
emitter.emitterShape = kCAEmitterLayerLine
emitter.emitterCells = generateEmitterCells(image: image)
print("emit")
emitter.setValue(0.0, forKey: "em")
return emitter
}
static func generateEmitterCells(image: UIImage) -> [CAEmitterCell] {
var cells = [CAEmitterCell]()
let cell = CAEmitterCell()
cell.contents = image.cgImage
cell.birthRate = 0.1
cell.lifetime = 20
cell.velocity = 250
cell.emissionRange = (10 * (.pi/180))
cell.scale = 0.9
cell.scaleRange = 0.3
cell.velocityRange = 100
cells.append(cell)
print("cells")
return cells
}
}
class ViewController : UIViewController{
override func viewDidLoad() {
super.viewDidLoad()
view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleTap)))
let view2 = UIView(frame: self.view.frame)
self.view.frame = CGRect(x: 0, y: 0, width: 320, height: 580)
super.view.backgroundColor = UIColor.white
self.view.addSubview(view2)
}
#objc func handleTap() {
rain()
}
func rain() {
let emitter = Emitter.get(with: UIImage(named: "Group 1493")!)
emitter.emitterPosition = CGPoint(x: view.frame.width / 2, y: view.frame.height + 25)
emitter.emitterSize = CGSize(width: view.frame.width, height: 2)
self.view.layer.addSublayer(emitter)
}
}
let controller = ViewController()
PlaygroundPage.current.liveView = controller.view
You could set lifetime propertie to 0 after first splash
DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
emitter.lifetime = 0
}
You need to do a few things.
You need to CAEmitterLayer's beginTime: emitter.beginTime = CACurrentMediaTime()
To stop new particles birth you need to set emitter.birthRate = 0. You can delay it using GCD to create this splash effect.
I am loading a UIWebView and in the meantime I wan't to show a blank page with this activity indicator spinning (siri activity indicator). From what I have understand you can not change the image, but can't I use that image and create an animation with it rotating 360° and looping? Or will that drain the battery?
something like this?:
- (void)webViewDidStartLoad:(UIWebView *)webView {
//set up animation
[self.view addSubview:self.loadingImage];
//start animation
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
//stop animation
[self.loadingImage removeFromSuperview];
}
What should I do?
Thanks in advance!
Most of this is found in Stack Overflow. Let me summarize:
Create an UIImageView which will serve as an activity indicator (inside storyboard scene, NIB, code ... wherever you wish). Let's call it _activityIndicatorImage
Load your image: _activityIndicatorImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"activity_indicator"]];
You need to use animation to rotate it. Here is the method I use:
+ (void)rotateLayerInfinite:(CALayer *)layer
{
CABasicAnimation *rotation;
rotation = [CABasicAnimation animationWithKeyPath:#"transform.rotation"];
rotation.fromValue = [NSNumber numberWithFloat:0];
rotation.toValue = [NSNumber numberWithFloat:(2 * M_PI)];
rotation.duration = 0.7f; // Speed
rotation.repeatCount = HUGE_VALF; // Repeat forever. Can be a finite number.
[layer removeAllAnimations];
[layer addAnimation:rotation forKey:#"Spin"];
}
Inside my layoutSubviews method I initiate rotation. You could place this in your webViewDidStartLoad and webViewDidFinishLoad if this is better for your case:
- (void)layoutSubviews
{
[super layoutSubviews];
// some other code
[Utils rotateLayerInfinite:_activityIndicatorImage.layer];
}
You could always always stop rotation using [_activityIndicatorImage.layer removeAllAnimations];
You may use this beautiful loader inspired from Tumblr app:
Asich/AMTumblrHud
Swift 5
Another answer working perfect
Step 1.
Create swift file "CustomLoader.swift" and put this code in that file
import UIKit
import CoreGraphics
import QuartzCore
class CustomLoader: UIView
{
//MARK:- NOT ACCESSABLE OUT SIDE
fileprivate var duration : CFTimeInterval! = 1
fileprivate var isAnimating :Bool = false
fileprivate var backgroundView : UIView!
//MARK:- ACCESS INSTANCE ONLY AND CHANGE ACCORDING TO YOUR NEEDS *******
let colors : [UIColor] = [.red, .blue, .orange, .purple]
var defaultColor : UIColor = UIColor.red
var isUsrInteractionEnable : Bool = false
var defaultbgColor: UIColor = UIColor.white
var loaderSize : CGFloat = 80.0
/// **************** ****************** ////////// **************
//MARK:- MAKE SHARED INSTANCE
private static var Instance : CustomLoader!
static let sharedInstance : CustomLoader = {
if Instance == nil
{
Instance = CustomLoader()
}
return Instance
}()
//MARK:- DESTROY TO SHARED INSTANCE
#objc fileprivate func destroyShardInstance()
{
CustomLoader.Instance = nil
}
//MARK:- SET YOUR LOADER INITIALIZER FRAME ELSE DEFAULT IS CENTER
func startAnimation()
{
let win = UIApplication.shared.keyWindow
backgroundView = UIView()
backgroundView.frame = (UIApplication.shared.keyWindow?.frame)!
backgroundView.backgroundColor = UIColor.init(white: 0, alpha: 0.4)
win?.addSubview(backgroundView)
self.frame = CGRect.init(x: ((UIScreen.main.bounds.width) - loaderSize)/2, y: ((UIScreen.main.bounds.height) - loaderSize)/2, width: loaderSize, height: loaderSize)
self.addCenterImage()
self.isHidden = false
self.backgroundView.addSubview(self)
self.layer.cornerRadius = loaderSize/2
self.layer.masksToBounds = true
backgroundView.accessibilityIdentifier = "CustomLoader"
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.NSExtensionHostDidBecomeActive, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(CustomLoader.ResumeLoader), name: NSNotification.Name.NSExtensionHostDidBecomeActive, object: nil)
self.layoutSubviews()
}
//MARK:- AVOID STUCKING LOADER WHEN CAME BACK FROM BACKGROUND
#objc fileprivate func ResumeLoader()
{
if isAnimating
{
self.stopAnimation()
self.AnimationStart()
}
}
override func layoutSubviews()
{
super.layoutSubviews()
self.backgroundColor = defaultbgColor
UIApplication.shared.keyWindow?.isUserInteractionEnabled = isUsrInteractionEnable
self.AnimationStart()
}
#objc fileprivate func addCenterImage()
{
/// add image in center
let centerImage = UIImage(named: "Logo")
let imageSize = loaderSize/2.5
let centerImgView = UIImageView(image: centerImage)
centerImgView.frame = CGRect(
x: (self.bounds.width - imageSize) / 2 ,
y: (self.bounds.height - imageSize) / 2,
width: imageSize,
height: imageSize
)
centerImgView.contentMode = .scaleAspectFit
centerImgView.layer.cornerRadius = imageSize/2
centerImgView.clipsToBounds = true
self.addSubview(centerImgView)
}
//MARK:- CALL IT TO START THE LOADER , AFTER INITIALIZE THE LOADER
#objc fileprivate func AnimationStart()
{
if isAnimating
{
return
}
let size = CGSize.init(width: loaderSize , height: loaderSize)
let dotNum: CGFloat = 10
let diameter: CGFloat = size.width / 5.5 //10
let dot = CALayer()
let frame = CGRect(
x: (layer.bounds.width - diameter) / 2 + diameter * 2,
y: (layer.bounds.height - diameter) / 2,
width: diameter/1.3,
height: diameter/1.3
)
dot.backgroundColor = colors[0].cgColor
dot.cornerRadius = frame.width / 2
dot.frame = frame
let replicatorLayer = CAReplicatorLayer()
replicatorLayer.frame = layer.bounds
replicatorLayer.instanceCount = Int(dotNum)
replicatorLayer.instanceDelay = 0.1
let angle = (2.0 * M_PI) / Double(replicatorLayer.instanceCount)
replicatorLayer.instanceTransform = CATransform3DMakeRotation(CGFloat(angle), 0.0, 0.0, 1.0)
layer.addSublayer(replicatorLayer)
replicatorLayer.addSublayer(dot)
let scaleAnimation = CABasicAnimation(keyPath: "transform.scale")
scaleAnimation.toValue = 0.4
scaleAnimation.duration = 0.5
scaleAnimation.autoreverses = true
scaleAnimation.repeatCount = .infinity
scaleAnimation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
dot.add(scaleAnimation, forKey: "scaleAnimation")
let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation")
rotationAnimation.toValue = -2.0 * Double.pi
rotationAnimation.duration = 6.0
rotationAnimation.repeatCount = .infinity
rotationAnimation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.linear)
replicatorLayer.add(rotationAnimation, forKey: "rotationAnimation")
if colors.count > 1 {
var cgColors : [CGColor] = []
for color in colors {
cgColors.append(color.cgColor)
}
let colorAnimation = CAKeyframeAnimation(keyPath: "backgroundColor")
colorAnimation.values = cgColors
colorAnimation.duration = 2
colorAnimation.repeatCount = .infinity
colorAnimation.autoreverses = true
dot.add(colorAnimation, forKey: "colorAnimation")
}
self.isAnimating = true
self.isHidden = false
}
//MARK:- CALL IT TO STOP THE LOADER
func stopAnimation()
{
if !isAnimating
{
return
}
UIApplication.shared.keyWindow?.isUserInteractionEnabled = true
let winSubviews = UIApplication.shared.keyWindow?.subviews
if (winSubviews?.count)! > 0
{
for viw in winSubviews!
{
if viw.accessibilityIdentifier == "CustomLoader"
{
viw.removeFromSuperview()
// break
}
}
}
layer.sublayers = nil
isAnimating = false
self.isHidden = true
self.destroyShardInstance()
}
//MARK:- GETTING RANDOM COLOR , AND MANAGE YOUR OWN COLORS
#objc fileprivate func randomColor()->UIColor
{
let randomRed:CGFloat = CGFloat(drand48())
let randomGreen:CGFloat = CGFloat(drand48())
let randomBlue:CGFloat = CGFloat(drand48())
return UIColor(red: randomRed, green: randomGreen, blue: randomBlue, alpha: 1.0)
}
override func draw(_ rect: CGRect)
{
}
}
find the func name and "addCenterImage" and replace the image name with your custom image.
Step 2
Create the AppDelegate class instance out side of the AppDelegate class like this.
var AppInstance: AppDelegate!
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate
{ func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool
{
AppInstance = self
}
Step 3.
put these two func in your AppDelegate
//MARK: - Activity Indicator -
func showLoader()
{
CustomLoader.sharedInstance.startAnimation()
}
func hideLoader()
{
CustomLoader.sharedInstance.stopAnimation()
}
Step 4. Use the functions like this whenever you want to animate your loader and stop.
AppInstance.showLoader()
AppInstance.hideLoader()
HAPPY LOADING...
SWIFT 4 Sweet And Simply just put extension UIView{}
Modified answer of #gandhi Mena
if you want to create your own custom Loading indicator
Create a UIView extension which create and customize your brand logo as a custom indicator put this code in you global declaration file.
extension UIView{
func customActivityIndicator(view: UIView, widthView: CGFloat?,backgroundColor: UIColor?, textColor:UIColor?, message: String?) -> UIView{
//Config UIView
self.backgroundColor = backgroundColor //Background color of your view which you want to set
var selfWidth = view.frame.width
if widthView != nil{
selfWidth = widthView ?? selfWidth
}
let selfHeigh = view.frame.height
let loopImages = UIImageView()
let imageListArray = ["image1", "image2"] // Put your desired array of images in a specific order the way you want to display animation.
loopImages.animationImages = imageListArray
loopImages.animationDuration = TimeInterval(0.8)
loopImages.startAnimating()
let imageFrameX = (selfWidth / 2) - 30
let imageFrameY = (selfHeigh / 2) - 60
var imageWidth = CGFloat(60)
var imageHeight = CGFloat(60)
if widthView != nil{
imageWidth = widthView ?? imageWidth
imageHeight = widthView ?? imageHeight
}
//ConfigureLabel
let label = UILabel()
label.textAlignment = .center
label.textColor = .gray
label.font = UIFont(name: "SFUIDisplay-Regular", size: 17.0)! // Your Desired UIFont Style and Size
label.numberOfLines = 0
label.text = message ?? ""
label.textColor = textColor ?? UIColor.clear
//Config frame of label
let labelFrameX = (selfWidth / 2) - 100
let labelFrameY = (selfHeigh / 2) - 10
let labelWidth = CGFloat(200)
let labelHeight = CGFloat(70)
// Define UIView frame
self.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width , height: UIScreen.main.bounds.size.height)
//ImageFrame
loopImages.frame = CGRect(x: imageFrameX, y: imageFrameY, width: imageWidth, height: imageHeight)
//LabelFrame
label.frame = CGRect(x: labelFrameX, y: labelFrameY, width: labelWidth, height: labelHeight)
//add loading and label to customView
self.addSubview(loopImages)
self.addSubview(label)
return self }}
Hide an indicator something like this you can remove subview at the top from the subview stack. put this code in the same globally declared swift file.
func hideLoader(removeFrom : UIView){
removeFrom.subviews.last?.removeFromSuperview()
}
Now you can shoot at the mark by this code
To display activity indicator in your view controller put this code when you want to display.
self.view.addSubview(UIView().customActivityIndicator(view: self.view, widthView: nil, backgroundColor:"Desired color", textColor: "Desired color", message: "Loading something"))
To hide animating loader you can user above function you defined in the globally. In your ViewController.swift where you want to hide put this line of code.
hideLoader(removeFrom: self.view)
imageListArray looks like this.
I've faced a similar issue lately. And this is my solution. Basically, it's what topic starter initially wanted: blank page with custom activity indicator on it.
I have partly used #Azharhussain Shaikh answer but I've implemented auto-layout instead of using frames and added a few other refinements with the intention to make usage as simple as possible.
So, it's an extension for UIView with two methods: addActivityIndicator() and removeActivityIndicator()
extension UIView {
func addActivityIndicator() {
// creating a view (let's call it "loading" view) which will be added on top of the view you want to have activity indicator on (parent view)
let view = UIView()
// setting up a background for a view so it would make content under it look like not active
view.backgroundColor = UIColor.white.withAlphaComponent(0.7)
// adding "loading" view to a parent view
// setting up auto-layout anchors so it would cover whole parent view
self.addSubview(view)
view.translatesAutoresizingMaskIntoConstraints = false
view.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
view.bottomAnchor.constraint(equalTo: self.bottomAnchor).isActive = true
view.leftAnchor.constraint(equalTo: self.leftAnchor).isActive = true
view.rightAnchor.constraint(equalTo: self.rightAnchor).isActive = true
// creating array with images, which will be animated
// in my case I have 30 images with names activity0.png ... activity29.png
var imagesArray = [UIImage(named: "activity\(0)")!]
for i in 1..<30 {
imagesArray.append(UIImage(named: "activity\(i)")!)
}
// creating UIImageView with array of images
// setting up animation duration and starting animation
let activityImage = UIImageView()
activityImage.animationImages = imagesArray
activityImage.animationDuration = TimeInterval(0.7)
activityImage.startAnimating()
// adding UIImageView on "loading" view
// setting up auto-layout anchors so it would be in center of "loading" view with 30x30 size
view.addSubview(activityImage)
activityImage.translatesAutoresizingMaskIntoConstraints = false
activityImage.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
activityImage.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
activityImage.widthAnchor.constraint(equalToConstant: 30).isActive = true
activityImage.heightAnchor.constraint(equalToConstant: 30).isActive = true
}
func removeActivityIndicator() {
// checking if a view has subviews on it
guard let lastSubView = self.subviews.last else { return }
// removing last subview with an assumption that last view is a "loading" view
lastSubView.removeFromSuperview()
} }
"Rotating" effect is achieved by those 30 images you've put in imagesArray. Each image is a new frame of a rotating indicator like this.
Usage. In your view controller for showing an activity indicator simply put:
view.addActivityIndicator()
For removing an activity indicator:
view.removeActivityIndicator()
For example, in case of using it with table view (like I do) it can be used like this:
func setLoadingScreen() {
view.addActivityIndicator()
tableView.isScrollEnabled = false
}
func removeLoadingScreen() {
view.removeActivityIndicator()
tableView.isScrollEnabled = true
}
It works in Swift 4.
Swift 5.0 version of accepted Answer
public extension UIImageView {
func spin(duration: Float) {
let rotation = CABasicAnimation(keyPath: "transform.rotation")
rotation.fromValue = 0
rotation.toValue = 2 * Double.pi
rotation.duration = 0.7
rotation.repeatCount = duration
layer.add(rotation, forKey: "spin")
}
func stopSpinning() {
layer.removeAllAnimations()
}
}
Without Image , you can use third party library
for objective C (also support in iOS 6) https://github.com/shebinkoshy/UIControllsRepo
for swift https://github.com/shebinkoshy/Activity-Indicator-Swift
Advantages
-> Able to set colors for spinner
-> Available in different sizes like tiny, small, medium, large, very large
-> Able to set Title (center and bottom) for medium, large, very large sizes
You can set an images to your activityIndicator. I created a function for add custom image to activityIndicator. Here is what I created.
public func showProgressView(view: UIView) -> UIImageView {
let containerView = UIView()
let progressView = UIView()
var activityIndicatorImageView = UIImageView()
if let statusImage = UIImage(named: Constants.ActivityIndicatorImageName1) {
let activityImageView = UIImageView(image: statusImage)
containerView.frame = view.frame
containerView.backgroundColor = UIColor(hex: 0xffffff, alpha: 0.3)
progressView.frame = CGRectMake(0, 0, 80, 80)
progressView.center = CGPointMake(view.bounds.width / 2, view.bounds.height / 2)
progressView.backgroundColor = UIColor(hex: 0x18bda3, alpha: 0.7)
progressView.clipsToBounds = true
progressView.layer.cornerRadius = 10
activityImageView.animationImages = [UIImage(named: Constants.ActivityIndicatorImageName1)!,
UIImage(named: Constants.ActivityIndicatorImageName2)!,
UIImage(named: Constants.ActivityIndicatorImageName3)!,
UIImage(named: Constants.ActivityIndicatorImageName4)!,
UIImage(named: Constants.ActivityIndicatorImageName5)!]
activityImageView.animationDuration = 0.8;
activityImageView.frame = CGRectMake(view.frame.size.width / 2 - statusImage.size.width / 2, view.frame.size.height / 2 - statusImage.size.height / 2, 40.0, 48.0)
activityImageView.center = CGPointMake(progressView.bounds.width / 2, progressView.bounds.height / 2)
dispatch_async(dispatch_get_main_queue()) {
progressView.addSubview(activityImageView)
containerView.addSubview(progressView)
view.addSubview(containerView)
activityIndicatorImageView = activityImageView
}
}
return activityIndicatorImageView
}
You can call this method everywhere in your code. And just call the startAnimating method. If you want to hide just call the stopAnimating method.
it works in both SWITF 3 and 4
var activityIndicator = UIActivityIndicatorView()
var myView : UIView = UIView()
func viewDidLoad() {
spinnerCreation()
}
func spinnerCreation() {
activityIndicator.activityIndicatorViewStyle = .whiteLarge
let label = UILabel.init(frame: CGRect(x: 5, y: 60, width: 90, height: 20))
label.textColor = UIColor.white
label.font = UIFont.boldSystemFont(ofSize: 14.0)
label.textAlignment = NSTextAlignment.center
label.text = "Please wait...."
myView.frame = CGRect(x: (UIScreen.main.bounds.size.width - 100)/2, y: (UIScreen.main.bounds.size.height - 100)/2, width: 100, height: 100)
myView.backgroundColor = UIColor.init(white: 0.0, alpha: 0.7)
myView.layer.cornerRadius = 5
activityIndicator.center = CGPoint(x: myView.frame.size.width/2, y: myView.frame.size.height/2 - 10)
myView.addSubview(activityIndicator)
myView.addSubview(label)
myView.isHidden = true
self.window?.addSubview(myView)
}
#IBAction func activityIndicatorStart(_ sender: Any) {
myView.isHidden = false
self.activityIndicator.startAnimating()
self.view.isUserInteractionEnabled = false
self.view.bringSubview(toFront: myView)
}
#IBAction func activityIndicatorStop(_ sender: Any)() {
myView.isHidden = true
self.activityIndicator.stopAnimating()
self.view.isUserInteractionEnabled = true
}
You can create your custom activity Indicator with this in Swift 3 & 4:
Create a new file with name: UIViewExtension.Swift and copy this code and paste in your new file file:
import UIkit
extension UIView{
func customActivityIndicator(view: UIView, widthView: CGFloat? = nil,backgroundColor: UIColor? = nil, message: String? = nil,colorMessage:UIColor? = nil ) -> UIView{
//Config UIView
self.backgroundColor = backgroundColor ?? UIColor.clear
self.layer.cornerRadius = 10
var selfWidth = view.frame.width - 100
if widthView != nil{
selfWidth = widthView ?? selfWidth
}
let selfHeigh = CGFloat(100)
let selfFrameX = (view.frame.width / 2) - (selfWidth / 2)
let selfFrameY = (view.frame.height / 2) - (selfHeigh / 2)
let loopImages = UIImageView()
//ConfigCustomLoading with secuence images
let imageListArray = [UIImage(named:""),UIImage(named:""), UIImage(named:"")]
loopImages.animationImages = imageListArray
loopImages.animationDuration = TimeInterval(1.3)
loopImages.startAnimating()
let imageFrameX = (selfWidth / 2) - 17
let imageFrameY = (selfHeigh / 2) - 35
var imageWidth = CGFloat(35)
var imageHeight = CGFloat(35)
if widthView != nil{
imageWidth = widthView ?? imageWidth
imageHeight = widthView ?? imageHeight
}
//ConfigureLabel
let label = UILabel()
label.textAlignment = .center
label.textColor = .gray
label.font = UIFont.boldSystemFont(ofSize: 17)
label.numberOfLines = 0
label.text = message ?? ""
label.textColor = colorMessage ?? UIColor.clear
//Config frame of label
let labelFrameX = (selfWidth / 2) - 100
let labelFrameY = (selfHeigh / 2) - 10
let labelWidth = CGFloat(200)
let labelHeight = CGFloat(70)
//add loading and label to customView
self.addSubview(loopImages)
self.addSubview(label)
//Define frames
//UIViewFrame
self.frame = CGRect(x: selfFrameX, y: selfFrameY, width: selfWidth , height: selfHeigh)
//ImageFrame
loopImages.frame = CGRect(x: imageFrameX, y: imageFrameY, width: imageWidth, height: imageHeight)
//LabelFrame
label.frame = CGRect(x: labelFrameX, y: labelFrameY, width: labelWidth, height: labelHeight)
return self
}
}
And then you can use it in your ViewController like this:
import UIKit
class ExampleViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.addSubview(UIView().customActivityIndicator(view: self.view,backgroundColor: UIColor.green))
}
//function for stop and desappear loading
func deseappearLoading(){
self.view.subviews.last?.removeFromSuperview()
}
}
Don't forget replace [UIImage(named:" "),UIImage(named:" "), UIImage(named:" ")] with your names of images and adjust the TimeInterval(1.3). Enjoy it.