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I was looking at formatters provided by Foundation framework and this time I would like to put some attention on MeasurementFormatter. Like the name says, it is used for creating localized strings of some sort of measurements. Measurements are represented by a generic struct Measurement where the generic UnitType describes the unit represented by it. …
Continue reading "Measurement, Unit, Dimension, and MeasurementFormatter on iOS"
WWDC’20 introduced WidgetKit which is a new framework for building widgets on iOS, iPadOS, and macOS. Widgets provide a quick way for displaying content from your app either on the home screen on iOS or on the notification center on macOS. As I have an iOS app which stores data with CoreData then let’s see …
Continue reading "Sharing data from CoreData storage with a Widget on iOS"
I am happy to announce that Signal Path 2.0 is available now for macOS and iOS. Signal Path uses Apple's universal purchase offering - buy it once for both platforms. Signal Path 2.0 on the App Store Past, present, and future I spent a lot of time architecting both apps in a way that they …
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Thank you to everyone who visted my blog and I really hope that you learnt something new. I am trying to keep my blog post short and having sample code what can be used instantly. But now, its time to take a look back on all the blog posts I wrote in 2019. This year …
XCTMetric enables creating tests with measure blocks collecting information about CPU, memory and disk. In this post we'll write UI-tests measuring a button tap what triggers writing to disk, allocating larger amount of memory and applying filters what requires CPU to do more work. It should be noted that XCTMetric can also be used in …
Property wrappers allow property declaration to state what kind of property wrapper is used for implementing the property. We can use it for implementing transformations on properties like validating if string is email or not. This is what we will do: creating a property wrapper for email properties and validating emails using NSDataDetector. If value …
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iOS 13 added a new class named UIContextMenuInteraction what is used for attaching menus to views. When adding menu interaction to a view and user uses 3D Touch or long press gesture on devices not supporting it, a menu is presented alongside with the highlighted content view. Therefore depending on the available space, not all …
Continue reading "Displaying menus with UIContextMenuInteraction on iOS"
Apple's Vision framework contains computer vision related functionality and with iOS 13 it can detect text on images as well. Moreover, Apple added a new framework VisionKit what makes it easy to integrate document scanning functionality. For demonstrating the usage of it, let's build a simple UI what can present the scanner and display scanned …
Continue reading "Scanning text using SwiftUI and Vision on iOS"
It is this time of the year when to look back. In total I published 22 blog posts and had 2765 views by 1632 people. Together with 3 posts from the 2017 I now have 25 blog posts. In the end of the July I posted Sharing UI code with protocol extension what marked the …
Almost every app needs a way of inserting information using keyboard. When keyboard shows up, we do not want to keep content behind the keyboard hidden and instead, allow user to see it. UIResponder contains several notifications we can use to adjust the layout. Keyboard change notifications UIResponder contains a list of notifications and user …
