Posts categorized under: Programming

Streaming a Web video to AppleTV with Xamarin

If you have the URL of a streaming video, it's easy to display on an AppleTV, even though tvOS does not have a UIWebView (which would make it really easy). You have to use some AVFoundation code, such as:

[code lang="csharp"]
var src = NSUrl.FromString("https://somevideo");
var asset …

The Half-Baked Neural Net APIs of iOS 10

iOS 10 contains 2 sets of APIs relating to Artificial Neural Nets and Deep Learning, aka The New New Thing. Unfortunately, both APIs are bizarrely incomplete: they allow you to specify the topology of the neural net, but have no facility for training.

I say this is "bizarre" for two …

WWDC Remote Viewing Protips

I attended the 2015 WWDC and made these notes afterwards. Aside from the specifics re. the Apple Watch and AppleTV, they may be of value to those who are considering streaming sessions next week:

WWDC: Post-show Streaming is the Key to Value

From an editorial perspective, one thing that is …

Tracking Apple Pencil angles and pressure with Xamarin

Rumor has it that Apple will support the Apple Pencil in the forthcoming iPad. If so, more developers will want to use the new features of UITouch -- force, angle, and elevation -- supported by the incredibly-precise stylus.

Basically, it's trivial:

-- Force is UITouch.Force;
-- Angle is UITouch.GetAzimuthAngle(UIView); and
-- Angle …

Hair-Tearing-Out-Thing Explainer (Provisioning Profiles):

There is a company called Round Red Food. They make brain-phones and brain-watches and brain-televisions. These brain-things run brain-books written by Round Red Food. But Round Red Food also allows other people to write brain-books.

Round Red Food wants to control what brain-books run on their brain-things. To do this …

TideMonkey: Development Diary 0

I am publicly committing to developing “TideMonkey,” a tide-prediction application that will run on (at least) iOS and watchOS.

TideMonkey will be based on Xtide, an excellent piece of software developed by David Flater. At the moment, my hope is that it will be a very loose port, or what …

GameplayKit path-finding in iOS 9 with Xamarin.iOS

Easy-peasy, lemon-squeazy:

[code lang="csharp"]
var a = GKGraphNode2D.FromPoint (new Vector2 (0, 5));
var b = GKGraphNode2D.FromPoint (new Vector2 (3, 0));
var c = GKGraphNode2D.FromPoint (new Vector2 (2, 6));
var d = GKGraphNode2D.FromPoint (new Vector2 (4, 6));
var e = GKGraphNode2D.FromPoint (new Vector2 (6, 5));
var f = GKGraphNode2D.FromPoint (new …

FizzBuzz with iOS 9 GameplayKit Expert System in C# with Xam.iOS

OK, so this is silly, but:

[code lang="csharp"]
var clearRule = GKRule.FromPredicate ((rules) => reset, rules => {
output = "";
reset = false;
});
clearRule.Salience = 1;

var fizzRule = GKRule.FromPredicate (mod (3), rules => {
output += "fizz";
});
fizzRule.Salience = 2;
var buzzRule = GKRule.FromPredicate (mod (5), rules => {
output += "buzz";
});
buzzRule.Salience = 2;

var outputRule = GKRule.FromPredicate …

Why You Should Watch WWDC Session Streams

From an editorial perspective, one thing that is clear about WWDC is that the main audience for the sessions is not the developers in attendance, but the much more diverse, more diffuse, and more transient on-line audience that will view the videos over the next months and even years.

WWDC …