What we need is a common place to put our initialization code before calling any superclass’s initializers, so what I currently using, shown in a code below. (It also cover the case of interdependence among defaults and keep them constant.) import UIKit class MyView: UIView { let value1: Int let value2: Int enum InitMethod { … Read more
This is what I came up with. It’s an extension to String. Don’t forget to add #import <CommonCrypto/CommonCrypto.h> to the ObjC-Swift bridging header that Xcode creates. extension String { var md5: String! { let str = self.cStringUsingEncoding(NSUTF8StringEncoding) let strLen = CC_LONG(self.lengthOfBytesUsingEncoding(NSUTF8StringEncoding)) let digestLen = Int(CC_MD5_DIGEST_LENGTH) let result = UnsafeMutablePointer<CUnsignedChar>.alloc(digestLen) CC_MD5(str!, strLen, result) let hash = … Read more
No, you do not need class prefixes in Swift, because classes are namespaced to the module in which they live. If you need to disambiguate between (for example) an Array from Swift and an Array class/struct that you’ve declared in your app, you can do so by typing it as a Swift.Array or a MyProject.Array. … Read more
Hope this may help you, var bottomImage = UIImage(named: “bottom.png”) var topImage = UIImage(named: “top.png”) var size = CGSize(width: 300, height: 300) UIGraphicsBeginImageContext(size) let areaSize = CGRect(x: 0, y: 0, width: size.width, height: size.height) bottomImage!.draw(in: areaSize) topImage!.draw(in: areaSize, blendMode: .normal, alpha: 0.8) var newImage:UIImage = UIGraphicsGetImageFromCurrentImageContext()! UIGraphicsEndImageContext() All the Best 🙂
This is solution which I have used in my app: var image: UIImage = UIImage(named: “imageName”) imageView.layer.borderWidth = 1.0 imageView.layer.masksToBounds = false imageView.layer.borderColor = UIColor.whiteColor().CGColor imageView.layer.cornerRadius = image.frame.size.width/2 imageView.clipsToBounds = true Swift 4.0 let image = UIImage(named: “imageName”) imageView.layer.borderWidth = 1.0 imageView.layer.masksToBounds = false imageView.layer.borderColor = UIColor.white.cgColor imageView.layer.cornerRadius = image.frame.size.width / 2 imageView.clipsToBounds = true
Explicitly typing scale to CGFloat, as you have discovered, is indeed the way handle the typing issue in swift. For reference for others: let scale: CGFloat = 2.0 let r = self.view.bounds var r2 = CGRect() r2.size.width = r.width * scale Not sure how to answer your second question, you may want to post it … Read more
You can use this Swift 5 code to play system sounds: // import this import AVFoundation // create a sound ID, in this case its the tweet sound. let systemSoundID: SystemSoundID = 1016 // to play sound AudioServicesPlaySystemSound(systemSoundID) The most up to date list of sounds I could find are here. Documentation Reference And this … Read more
Keep in mind that UITableView is defined as an optional in the function, which means your initial cell declaration needs to check for the optional in the property. Also, the returned queued cell is also optional, so ensure you make an optional cast to UITableViewCell. Afterwards, we can force unwrap because we know we have … Read more
translatesAutoresizingMaskIntoConstraints needs to be set to false when: You Create a UIView-based object in code (Storyboard/NIB will set it for you if the file has autolayout enabled), And you want to use auto layout for this view rather than frame-based layout, And the view will be added to a view hierarchy that is using auto … Read more
UPDATE If your deployment target at least iOS 16, macOS 13, tvOS 16, or watchOS 9, you can write a custom Layout. For example: import SwiftUI struct MyLayout: Layout { func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize { return proposal.replacingUnspecifiedDimensions() } func placeSubviews(in bounds: CGRect, proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) … Read more