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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 …
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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 …
Every app consists of different flows for achieving a specific goal. For example, there is a sequence of views for sign up. When sign up flow ends, we need to move to so called main view what represents the main functionality of the app. There are definitely a lot of different ways how to handle …
Continue reading "Navigating using flow controllers and responder chain on iOS"
This time we are going to take a look on how to create a form with text input using UITableView. Displaying static text in UITableView is easy but for enabling text input in UITableView and propagating the change back to a model object requires a couple of steps. Introduction In this example project we are …
Storing data persistently on iOS is something what is needed quite often. In this post, we are going to look into how to build a persistent data store and how to store image data. Initialising the persistent data store Persistent data store is an object managing a folder on disk. It allows writing and reading …
In the beginning of this year I blogged about how to generate random float and integers. Meanwhile, SE-0202 "Random Unification" got implemented in Swift 4.2 making my additions unnecessary. Let's take a look how to use new API for getting random numbers. Random integers, floats and booleans In my own implementation I was extending range …
This time we will take a look on how to take photos and browse them on iOS. Using UIImagePickerController Creating user interface for taking photos consists of presenting an instance of UIImagePickerController. Controller needs a delegate and source type what defines if we are going to take a photo or pick a photo from the …
In iOS view transitions can be interactive and non-interactive. In this post we are going to take a look on how to implement a custom non-interactive transition. Setting up a custom transition For setting up a custom non-interactive transition it is needed to create an animator object defining the transition and feeding it into UIKit. …
