How create UIImage from bytes?

How create UIImage from bytes?

By : Dj-Roy Live
Date : January 10 2021, 01:45 PM
it should still fix some issue You'll want to create a bitmap context (using CGBitmapContextCreate()), and draw into that. This requires using CoreGraphics. Then take your context and use CGBitmapContextCreateImage() to create an CGImageRef out of it. Finally, use +[UIImage imageWithCGImage:] to convert that CGImageRef to a UIImage.
code :

Share : facebook icon twitter icon
Get bytes from UIImage

Get bytes from UIImage

By : user3134473
Date : March 29 2020, 07:55 AM
I wish this helpful for you UIImageJPEGRepresentation or UIImagePNGRepresentation will return NSData*'s that you can use to get the raw data
See docs here
How do I use the NSString draw functionality to create a UIImage from text and combine this image with another UIImage

How do I use the NSString draw functionality to create a UIImage from text and combine this image with another UIImage

By : Mariana Tremurici
Date : March 29 2020, 07:55 AM
like below fixes the issue I have NSString draw functionality to create a UIImage from text and combine this image with another UIImage and also movable UIImage.now i want to combine this Two UIImage together into a single UIImage.
code :
-(UIImage *)imageFromText:(NSString *)text
    // set the font type and size
    UIFont *font = [UIFont systemFontOfSize:20.0];
    CGSize size  = [text sizeWithFont:font];

    // check if UIGraphicsBeginImageContextWithOptions is available (iOS is 4.0+)
    if (UIGraphicsBeginImageContextWithOptions != NULL)
        // iOS is < 4.0

    // optional: add a shadow, to avoid clipping the shadow you should make the context size bigger
    // CGContextRef ctx = UIGraphicsGetCurrentContext();
    // CGContextSetShadowWithColor(ctx, CGSizeMake(1.0, 1.0), 5.0, [[UIColor grayColor] CGColor]);

    // draw in context, you can use also drawInRect:withFont:
    [text drawAtPoint:CGPointMake(0.0, 0.0) withFont:font];

    // transfer image
    UIImage *Image = UIGraphicsGetImageFromCurrentImageContext();

    return Image;
how to create an UIImage that represent a radial portion of an UIImage?

how to create an UIImage that represent a radial portion of an UIImage?

By : user3901259
Date : March 29 2020, 07:55 AM
With these it helps given an image below and a percentage say 25%. How can I generate another UIImage that represent 25% of the radial portion of the given image? Any help is greatly appreciated.
code :
- (UIImage *)radialPortion:(float)percent image:(UIImage *)image
    CGSize size = image.size;
    CGRect rect = {CGPointZero,size};
    CGFloat radius = MAX(size.width, size.height)/2;
    UIBezierPath *path = [UIBezierPath bezierPath];
    CGPoint center = CGPointMake(size.width/2, size.height/2);
    [path moveToPoint:center];
    [path addLineToPoint:CGPointMake(center.x, center.y-radius)];
    [path addArcWithCenter:center radius:radius startAngle:-M_PI_2 endAngle:-M_PI_2+M_PI*2*percent clockwise:1];
    [path closePath];
    [path addClip];
    [image drawInRect:rect];
    return UIGraphicsGetImageFromCurrentImageContext();
How to create a UIImage from bytes

How to create a UIImage from bytes

By : Bounta Btb
Date : March 29 2020, 07:55 AM
help you fix your problem I've a String with byte code of a Image, I want create a UIImage from it. , Try this.
code :
let data : Data = Data(base64Encoded: codeBytes, options: .ignoreUnknownCharacters)!
cell.imgView.image = UIImage(data: data)
Create new UIImage from freehand drawn line over UIImage - Swift

Create new UIImage from freehand drawn line over UIImage - Swift

By : user2197137
Date : March 29 2020, 07:55 AM
With these it helps If you want to create an image from a masked path, you can:
Create UIBezierPath from user gesture Use that bezier path as the CAShapeLayer on the image view When the user gesture is done, remove that shape layer, but create new shape layer and use it as a mask Create image from that masked image view: Use UIGraphicsBeginImageContextWithOptions to begin the image rendering process; Use drawHierarchy to render whatever should be captured in the image; Use UIGraphicsGetImageFromCurrentImageContext to capture the image from whatever you rendered, and Use UIGraphicsEndImageContext to indicate that the image rendering process is done.
code :
class ViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!

    private var path: UIBezierPath?
    private var strokeLayer: CAShapeLayer?

    @IBAction func didHandlePan(_ gesture: UIPanGestureRecognizer) {
        let location = gesture.location(in: imageView)

        switch gesture.state {
        case .began:
            path = UIBezierPath()
            path?.move(to: location)
            strokeLayer = CAShapeLayer()
            strokeLayer?.strokeColor = #colorLiteral(red: 1, green: 0.1491314173, blue: 0, alpha: 1).cgColor
            strokeLayer?.fillColor = #colorLiteral(red: 0, green: 0, blue: 0, alpha: 0).cgColor
            strokeLayer?.lineWidth = 5
            strokeLayer?.path = path?.cgPath

        case .changed:
            path?.addLine(to: location)
            strokeLayer?.path = path?.cgPath

        case .cancelled, .ended:
            // remove stroke from image view

            strokeLayer = nil

            // mask the image view

            let mask = CAShapeLayer()
            mask.fillColor = #colorLiteral(red: 0, green: 0, blue: 0, alpha: 1).cgColor
            mask.strokeColor = #colorLiteral(red: 0, green: 0, blue: 0, alpha: 0).cgColor
            mask.lineWidth = 0
            mask.path = path?.cgPath
            imageView.layer.mask = mask

            // get cropped image

            guard let image = imageView?.snapshot else { return }
            imageView.layer.mask = nil

            // perhaps use that image?

            imageView.image = image

        default: break

extension UIView {
    var snapshot: UIImage? {
        UIGraphicsBeginImageContextWithOptions(bounds.size, false, 0)
        drawHierarchy(in: bounds, afterScreenUpdates: true)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        return image
Related Posts Related Posts :
  • Load PDF into layer offscreen
  • What is the best approach for writing unit tests for iPhone / iPad?
  • I am getting the error Wrong type argument to unary minus and Expected ';' before ':' token
  • Custom logo on top of UINavigationBar?
  • Custom UISlider Image disappearing?
  • HTML5 on iPhone Safari - data stored by localStorage does not always persist. Why?
  • @synthesize comma separated list
  • Xcode iPhone Programming check if a server is online
  • objective c iphone : can we view console log on device
  • What are the sizes used for the iOS application splash screen?
  • UITableViewCell with custom gradient background, with another gradient as highlight color
  • Print a copy of my app in the iPhone Simulator?
  • NSNumberFormatter, how to remove blank spaces in currency symbol
  • Google Map Street view in Iphone app
  • How can i make a link to update my iPhone application?
  • Question Related to Custom control
  • get SSL Broken pipe error when try to make push notification
  • How to store UISegmentedControle state in NSUserdefaults
  • What developer conferences/code camps would one go for mobile development?
  • How can I intercept the StoreKit "buy dialog" to make a MBProgressHUD / UIProgressView show up correctly and a
  • Is Appcelerator Titanium now banned on the iPhone?
  • Data storing in plist works in simulaor but not in device
  • UISearchDisplayController and search performance with lots of data
  • Why is my UIViewController initializer never called?
  • Can you run a blender game on an iphone or droid?
  • CGBitmapContextCreate on the iPhone/iPad
  • Problem pushing multiple view controllers onto navigation controller stack
  • addSubview like modal
  • UITableView section index overlaps search bar
  • iPhone Mapkit: How can I get a real business name/address from a longitude/latitude?
  • animating adding/removing layers on iPhone
  • iPhone 4.0 Beta compile for 3.1.3
  • how to implement RSA algorithm in iphone application?
  • IPhone SDK Default NSUserDefaults
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk