malhal

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SwiftUI, Swift, Objective-C and iOS Development

SwiftUI

NavigationSplitView with List selection of different types

I came across an interesting Stack Overflow question about how to support List selection of different types when using NavigationSplitView when in regular width, e.g. on iPad landscape. This problem doesn’t arise with NavigationStackView because multiple ForEach can simply iterate Read more…

By malhal, 3 weeks12th January 2023 ago
SwiftUI

Multiple sheets in SwiftUI using subviews

If you need to show multiple sheets in SwiftUI it is best to use the framework features to your advantage. Rather than try to abstract the problem into a generic coordinator object, which you then have to unbundle again to Read more…

By malhal, 2 months29th November 2022 ago
SwiftUI

Nested Property Wrappers in Swift

I designed a better way to nest property wrappers than other examples I’ve seen in this article and this Stack Overflow question. The sample below is a redesigned version of the code in the question, which I also posted as Read more…

By malhal, 2 months18th November 2022 ago
SwiftUI

UITextView in a UIViewRepresentable

I’ve seen a lot of code shared online getting the Coordinator wrong so thought I’d share an example of how I believe the Coordinator should be done. makeView returning context.coordinator.textView is taken from Fruta’s PaymentButton.swift but the ideas of the Read more…

By malhal, 2 months17th November 2022 ago
MapKit

UIViewRepresentable with Coordinator Example

There are not many examples of correctly using a Coordinator with UIViewRepresentable so thought I would share one here. You’ll see many examples including some from Apple that return Coordinator(self) which is completely wrong because the UIViewRepresentable is a struct Read more…

By malhal, 2 months16th November 2022 ago
SwiftUI

SwiftUI List EditActions

It’s hard to find this feature in the documentation so thought I’d share an example here.

By malhal, 3 months14th November 2022 ago
SwiftUI

How to get @Environment or @EnvironmentObject inside ObservableObject

Saw this interesting question on Stackoverflow and thought I would answer it. The trick is to use `DynamicProperty as an intermediary as follows:

By malhal, 7 months28th June 2022 ago
SwiftUI

Open window / scene in SwiftUI 2.0 on macOS

Here is how to open a new window or re-activate an existing one in SwiftUI on macOS. In your ContentView create a button and open a URL for your app and another View e.g. Viewer to be shown in the Read more…

By malhal, 2 years6th December 2020 ago
CoreData

Dynamically filtering @FetchRequest with SwiftUI

Update 30/6/2022: I realised we shouldn’t be initing NSPredicate objects inside body so need a new approach. I was reading Paul Hudson’s article Dynamically filtering @FetchRequest with SwiftUI and thought I would share an improvement for declaring the singers @FetchRequest Read more…

By malhal, 2 years3rd December 2020 ago
SwiftUI

SwiftUI: AppStorage with Dynamic Key

If we want to use @AppStorage but with a dynamic key passed to the View we can do this: DynamicKeyApp.swift ContentView.swift

By malhal, 2 years ago

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Recent Posts
  • NavigationSplitView with List selection of different types
  • Multiple sheets in SwiftUI using subviews
  • Nested Property Wrappers in Swift
  • UITextView in a UIViewRepresentable
  • UIViewRepresentable with Coordinator Example
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