About Matt Crombie

Matt has been developing software for over 17 years and these days specialises in cross-platform app development. He's developed dozens of apps on several of the app stores with apps hitting #1. Matt's worked for large software companies and enterprise organisations, the Australian government as well as various startups on cutting edge technology. Originally from New Zealand, Matt currently lives in Brisbane with his wife, daughter and two dogs.

Keeping your UI fast by using this HTTP trick to check if a remote resource exists

Frequently I find a requirement in mobile projects is to consume remote resources, whether it's images, video, audio etc, the requirement comes up fairly frequently. A common problem I found myself hitting was that when you're trying to do this with a backend or customisable content that relies on a URL is that sometimes

Xamarin.iOS April 2021 bug: System.EntryPointNotFoundException: xamarin_timezone_get_data

Having been successfully developing a recent feature a project, I came across an issue suddenly with Xamarin.iOS builds that had gone out to the client. All of a sudden the apps were crashing immediately on startup.Running the same configuration up locally, everything was working fine. When I ran the code on a device however I

By |2021-07-08T18:35:57+10:00April 20th, 2021|Categories: iOS, Xamarin, Xamarin.iOS|Tags: , |0 Comments

5 day-to-day C# extension methods to make your life easier

I've noticed recently I take for granted some extensions methods I've been using for a while now that I use on a fairly frequent basis. From getting a file as base64 quickly to to just doing simple JSON operations, here are 5 day to day extension methods that hopefully prove helpful to your projects.

By |2021-03-25T15:56:38+10:00February 18th, 2021|Categories: .NET Standard, C#, Microsoft, Visual Studio, Xamarin|0 Comments

Fixing small text on iOS WKWebView’s in Xamarin.Forms

Even though Apple have extended the deadline to remove UIWebView's from apps until December, the requirement to update things is still there and I'm finding a lot of clients wanting to get ahead of things and move on. On several apps I work with there is HTML content within the app that's maintained by non-technical

By |2020-05-09T07:38:37+10:00May 7th, 2020|Categories: Apple, iOS, UI, Xamarin, Xamarin.Forms|2 Comments

Automate iOS TestFlight step “Missing export compliance” for every build

Distributing a lot of test versions of apps comes with the territory of being an app developer. There's no way around it. Whilst Microsoft App Center has made cross-platform distribution pretty straight forward and painless, there are times when the individual platform methods come in to play. One thing I do is run a

By |2020-04-10T14:44:13+10:00April 10th, 2020|Categories: Apple, DevOps, iOS|Tags: , , , , , |6 Comments

Customising iOS Frame shadows in Xamarin.Forms 4.5+

Even with iOS 13 having been out for quite a while now and Xamarin.Forms 4.5+ bringing a lot of improvements and fixes, I still find myself having to customise things for different projects (usually for the same reason as some of my other other posts: Graphic Designers and marketing people 😂). One thing that was

By |2020-05-26T13:36:56+10:00April 7th, 2020|Categories: Apple, iOS, UI, Xamarin, Xamarin.Forms|Tags: , , , |8 Comments

Making iOS 13 segmented controls prettier in Xamarin.Forms

Following on from my last post about iOS 13, I've since had the need to update various apps that have a segmented control. I've been using Alexander Reyes cool control Segmented Control Plugin for Xamarin.Forms (I believe there are a few others out there as well) to get keep everything nicely in XAML and working

By |2019-11-22T15:39:15+10:00November 22nd, 2019|Categories: Apple, iOS, UI, Xamarin, Xamarin.Forms|Tags: , , |0 Comments

Controlling iOS 13 modal presentation styles in Xamarin.Forms

With the official release of iOS 13, I've found that as I move some of the apps I work on up to targeting this that various UI components don't work as they used to. So far, this isn't nearly as much of an issue as the transition from iOS 6 to iOS 7 (for

By |2019-10-20T17:35:30+10:00October 18th, 2019|Categories: Apple, iOS, UI, Xamarin, Xamarin.Forms|Tags: , , , |7 Comments

Zip files and folders then export them from your app with .NET Standard

For the majority of the apps I've worked on, there's been a requirement to store some sort of data in files. Whether it's images from the camera or gallery, a database or just log files it seems to come up more often than not. When you're working in the simulator/emulator environment during development it's

By |2019-09-20T15:22:47+10:00September 20th, 2019|Categories: .NET Standard, Android, iOS, Xamarin, Xamarin.Forms|0 Comments
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