uiimage – Page 5 – Tarik Billa

How to set the alpha of an UIImage in SWIFT programmatically?

June 4, 2023 by Tarik

Luckily I was able to help myself and would like to share with you my solution: Swift 3 // UIImage+Alpha.swift extension UIImage { func alpha(_ value:CGFloat) -> UIImage { UIGraphicsBeginImageContextWithOptions(size, false, scale) draw(at: CGPoint.zero, blendMode: .normal, alpha: value) let newImage = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return newImage! } } The above new Swift extension I added to … Read more

What’s the default size for the UIImage in a UITableViewCell?

June 2, 2023 by Tarik

40×40 UITableViewCell’s imageView fit to 40×40 Need to make imageView filled in 40×40… I am using SDK 3.0 with build in “Cell Objects in Predefined Styles”…

SwiftUI – Add Border to One Edge of an Image

May 29, 2023 by Tarik

Demo Implementation You can use this modifier on any View: .border(width: 5, edges: [.top, .leading], color: .yellow) With the help of this simple extension: extension View { func border(width: CGFloat, edges: [Edge], color: Color) -> some View { overlay(EdgeBorder(width: width, edges: edges).foregroundColor(color)) } } And here is the magic struct behind this: struct EdgeBorder: Shape … Read more

Crop UIImage to fit a frame image

May 24, 2023 by Tarik

In Interface Builder, use the following configuration: There are two important settings, namely: Mode: Aspect Fill Clip Subviews It can also be done programmatically: [imageView setContentMode:UIViewContentModeScaleAspectFill]; [imageView setClipsToBounds:YES]; This will correctly fill the view with the image, keep its aspect ratio and hide what doesn’t fit.

iOS: Image get rotated 90 degree after saved as PNG representation data

May 24, 2023 by Tarik

Starting with iOS 4.0 when the camera takes a photo it does not rotate it before saving, it simply sets a rotation flag in the EXIF data of the JPEG.If you save a UIImage as a JPEG, it will set the rotation flag.PNGs do not support a rotation flag, so if you save a UIImage … Read more

How to draw an UIImage or directly in -drawRect:?

May 20, 2023 by Tarik

Call [img drawInRect:rect];.

UIImage -> CGImageRef

May 19, 2023 by Tarik

It is as simple as image.CGImage where image is a UIImage object.

Create a UIImage with a URL in iOS

May 19, 2023 by Tarik

This is a three step process. First you will create an NSURL object to hold the URL we are attempting to access. We will supply this URL to the NSData class method, +dataWithContentsOfURL: to obtain the image over the network as raw data, then use the +imageWithData: class method on UIImage to convert the data … Read more

Creating a horizontal line

May 14, 2023 by Tarik

Create a UIView with a black background that is 1 pixel high and 320 pixels wide.

How to get UIImage of AppIcon?

May 11, 2023 by Tarik

The problem is that the AppIcon from the asset catalog is not placed in the the catalog after compiling. Instated it it copied into your apps bundle, just like before. The name conversion used when copying the icon to the app bundle is AppIcon<size>.png, where the size is for example 40×40 or 72×72 You can … Read more