AirPods – the most expensive backup headphones I’ve ever bought…

… But utterly worth it.

I have a pair of wireless Bose QC35s which are awesome, they are the headphones I primarily use because the noise cancelling is insane, and for my non-audiophile ears they sound amazing.

But they are big, and not really appropriate for use if I don’t have a bag to put them in. That’s why, until now, I’ve always kept a pair of wired in-ear headphones that I can take out with me when I don’t want to carry around a bag and carry case.

As an example, if I’m going on a night out I want to carry as little as possible on me, but I really need some way of listening to music on the train home (because nobody needs to deal with the last train home without music). In these sorts of situations, audio quality is definitely not at the top of my list, but portability and discreteness are; two things AirPods excel at.

That’s not to say the audio quality on AirPods is bad, although they leak sound just like regular EarPods, they sound great to me and I’ve had absolutely no issue with connection at all.

On top of being insanely portable, sounding great and being easy to set up, when used alongside an Apple Watch it’s a match made in heaven. The lack of track and volume controls totally disappears when you have access to both the Music app and the Now Playing “Glance” (you can add this to the Dock in watchOS 3). Better still, the Now Playing Glance lets you control Spotify, or indeed anything else that shows up in the audio controls section of Control Center on iOS.

AirPods are, currently, an extravagance. As someone who loves gadgets I can find ways to justify the cost to myself, but not everyone can. But they are new, and Apple knows they can make some extra bucks from early adopters (as they have done many times in the past, with the first MacBook Air, Retina MacBook Pro and 12″ MacBook as examples). Wireless is the future, and I long for the day wires are completely abolished from everything, not just computing. The cost of them will come down as competition becomes more fierce and the technology matures, but until then I can firmly say, these are the most expensive backup headphones I’ve ever bought, but they are truly, utterly worth it.

It’s ShowTime

Over the weekend I finally got time to work on something I’ve been meaning to get round to for quite some time now.

Introducing ShowTime, an insanely simple way to show your taps and gestures while demoing your iOS app.

Why another one?

I know, if you Google “show touches iOS app” you’ll get a few results. Some old with no recent support and some newer with some support. The reason I still decided to make ShowTime is because none of the solutions I’ve tried work with both single- and multi-window iOS apps.

The last two projects I’ve inherited at work both display new content in multiple windows. This would mean replacing each window with one of the “show touches” window solutions, which isn’t a trivial amount of work.

No, what I want is something that has little to no set up whatsoever, works with multiple windows automatically and can show the level of pressure shown on devices that support 3D Touch. Oh and it needs to be pure Swift code.

So I made one myself.

Why show touches on screen?

If you’re watching someone use an app on their phone, you can see what their fingers are doing so the gestures make sense. In contrast, if you’re watching someone use an app on a screen or video without being able to see their hands, you suddenly loose a lot of context, especially around multiple-touch gestures.

We work hard on making apps, and demoing them is part of our job as professional developers. As an iOS developer we don’t have a native way of showing touches on screen like Android do, so we have to get creative.

How does it work?

ShowTime uses method swizzling, a technique used to replace a default implementation of a class’ function with your own. Swift itself doesn’t support method swizzling, but because any Swift type that inherits from NSObject uses the Obj-C runtime, it is possible to swizzle their methods.

Thankfully, UIWindow inherits from NSObject so it’s possible to swizzle its methods, and the one we’re specifically interested in is sendEvent(_:) which takes a UIEvent as its argument.

ShowTime replaces the default sendEvent(_:) method with its own, and intercepts the event to extract touches. It then displays those touches on the window receiving sendEvent(_:) and then lets the window carry out its default implementation of sendEvent(_:).

This means that all instances of UIWindow (and its subclasses) will automatically get this behaviour, so it doesn’t matter if new windows are created, touches will always be shown.

How to set up ShowTime

There’s actually nothing to do to set up ShowTime other than to include ShowTime.swift in your project.

That said, you can customise the behaviour if you want. You can change the fill and outline of each visual touch, whether force is shown visually, whether to include the number of taps inside each visual touch (great for demoing maps), and more. By default ShowTime shows a blue visual touch, because it contrasts well with most content.

My recommendation for keeping ShowTime around without putting it into production code is to create a demo branch in your repo which has ShowTime installed. You can then merge develop into this branch whenever you’re demoing something, and because there’s such little setup with ShowTime you’ll rarely get merge conflicts.


Hopefully you’ll try ShowTime during your next client demo, internal demo or while creating a product video. If you do, please let me know how you get on!

Extending NSCoding

NSCoding is used often through many iOS, macOS, watchOS and tvOS apps, and usually results in instances that conform being archived into data for transportation or persisting.

So lets extend NSCoding so we can easily archive that object. It’s very simple but very useful:

Now any type that conforms to Archivable will have to conform to NSCoding and will also be easily archived by calling instance.archivedData. Because we’ve extended the protocol itself, all types that declare they conform get this behaviour for free. Neat ?

Why I Think watchOS 1 Did Long-term Damage to Apple Watch’s Reputation

Let me start by saying I do not hate Apple Watch. I love Apple Watch, I have two different models and have owned more than that, and the device hasn’t been out even a year yet. It’s an awesome little device and has so much potential.

But, I personally feel Apple made a significant error releasing Apple Watch with watchOS 1 which will do some very long-term damage to Apple Watch’s reputation for iterations to come. Here’s why:

1. People think Apple Watch is slow

watchOS 1 apps had a very different architecture to watchOS 2 apps. watchOS 1 apps were, in essence, extensions of an iOS app which ran on the iPhone itself, and essentially just used the watch as a second screen.

To load anything, or respond to taps, Apple Watch had to ask the iPhone for the information or to carry out the task and then refresh the UI and send any data back. Over Bluetooth. This took a lot of time, especially when first loading the app’s UI, and everything felt sluggish.

Mere months later, Apple release watchOS 2 to developers with native apps. Native apps no longer get loaded from the iPhone each time and all components of the app are stored on the watch. Apple Watch apps can now do most computation on-device, and don’t need to load the UI from the iPhone. Everything is super speedy, well-written apps load in 3-5 seconds, and UI is very responsive, but it requires (parts of) the app to be re-written. This brings me to point 2:

2. Many developers don’t want to spend time porting a watchOS 1 app to watchOS 2

Whether you’re a big company or an independent developer, finding out there’s a whole new architecture (and new APIs to port to as a result1) to develop for just a few months after the device has released isn’t great news. It takes time to develop an app, especially on a brand new platform, even on a device as small as Apple Watch.

I’ve lost the article now (I think it was on but there was a report about how few apps have been updated to be native, and for me this is still true for many watchOS apps that I use like Philips Hue. It’s frustrating to know that their app could load significantly faster if they ported to watchOS 2, and if a company that far advanced in terms of iOS and HomeKit support haven’t ported to watchOS 2, is it so surprising that more independent developers haven’t either?

We can’t expect all users of Apple Watch to understand that even though they’ve updated to watchOS 2, an app isn’t automatically native. To them, it’s just another slow to load app. This hurts the developers’ reputation and also Apple Watch’s reputation.

So many developers wanted to make the gold rush when Apple Watch was released, there were so many apps being released at the time that it was staggering. Imagine if every single one of those apps were native and had access to the same APIs that apps could a mere few months later.

In my opinion, Apple should have waited. It would have launched with reviews of how responsive the UI is in apps, rather than the opposite.


1 Updating my app, MacID for Apple Watch, to support watchOS 2 was surprisingly more difficult than I expected. If I had multiple apps to port to watchOS 2 I honestly couldn’t say if I would have spent the time porting all of them, but that just further highlights my point.

Hello, I’m gay.

Yesterday was National Coming Out Day, a day I love because we all get to share our stories, remember our experiences and, hopefully, show other gay people that it’s okay and everything will be alright. 

While pottering about thinking about my own experience, it dawned on me; although I “officially” came out when I was 13 (if there is such a thing), I’ve never stopped coming out since. 

Coming out is made to sound like a one-time, rip-the-plaster-off experience. Often painful, but better to do quickly, right? In reality, that is hardly the case. Sure, I may now find it easier to tell new people I’m gay, but each time I do, I’m still coming out to them all over again. 
If I start a new job or get a new barber, I will inevitably have to let them know at some point, or be subjected to talk about “fit birds” or asked if I saw “that one”. Telling a new barber is especially scary as not only are they in control of how I look for the next few weeks, they also have a razor to hand. Yes, it is still a fear even in 2015. 

When talking to someone new and they ask me whether I have a girlfriend and I say no, it’s assumed I’m single. The onus is on me to clarify and risk being shunned out of a potential new circle of friends.

I’m not trying to say that coming out isn’t easier in 2015; quite the contrary. We have such easy access to a fantastic community and array of support I would say it’s easier than ever (if you live in certain countries), but these things are all still very real and can get incredibly tedious. I’m 28 now, I can’t even imagine how many times I’ve been told I don’t “look gay”. Well, comrade, I can assure you I am, it’s been the one constant in my life and something that has made me a very independent person.

To clarify, I don’t really give a fuck if some closed-minded person dislikes me because I happen to find men more attractive than women, I know there are more people in the world who I would prefer dedicating my friendship to. But that doesn’t change the possibility of violence, or the possibility that it could negatively affect my career.

We take a lot of shit as gay people, and far too many people are still uncomfortable talking naturally about themselves in conversation. This needs to change. If you’re ever on the other side of the conversation and realising that someone is gay, brush it off and carry on. Let them know you’re okay with gay people by continuing to be the same person, so they can too. Don’t say ridiculous things like “I don’t have a problem with gay people.”, or “I have a gay friend, do you know them?”. It’s insulting, even if you didn’t realise it before now. 

You don’t have to come out as someone who accepts me, just accept me. Besides, I’m awesome and it’s your loss if you don’t.

Where Does Apple Watch Fit In?

After getting my grubby fingers all over an Apple Watch since the 24th April I’ve had a fair bit of time to use it, both for personal use and for development of MacID.

During that time I’ve been asked time and time again:

What does it do? Is it worth it?

The answers I give to that are “everything” and “yes”, but I think what people really want to know when they ask is, “what is it good for?”.

To answer that, lets have a look at where Apple’s other products fit in to our lives. (This, of course, is circumstantial and just a generalisation).

The Mac, nowadays, is ultimately for creating content. OS X is still the parent of all other Apple products, and it’s still usually the easiest way of doing multiple things at once when you’re working on a project. The iPad tries to be a content creator, but in reality it still fails in many aspects. Sure, it’s good for a quick edit of a Pages document, but if you want to create a website, code an app, do some detailed design work, or write an essay, you still need to use a proper operating system with much more accurate input.

iOS on the other hand, is amazing for consuming content and communication. Twitter, Instagram, messaging, iBooks, listening to Music; these are all far superior on iOS. Again, you can do all of this on your Mac now, but engagement is much higher on mobile devices for this sort of content.

So, what about Apple Watch? I personally think Apple Watch will excel with utility apps. Apps which allow you to unlock your Mac or hotel room, board a plane, check your car’s current charge, book a cab, control your TV, or check off a shopping list. These all take seconds of your time for each interaction, and are perfect for the small form factor.

Once developers stop seeing Apple Watch as something they have to get their current apps onto, and start understanding where it will excel, Apple Watch (and other wearables) will start to become integral in our lives just like laptops and smartphones.

Winning the War Bluetooth on OS X

If you’re experiencing issues with MacID not reconnecting properly, this post outlines some of the things that you can do to try and overcome the problems.

Bluetooth in OS X is becoming the new wifi in OS X. That is to say, it’s now exceptionally buggy for some people.

While we wait for Apple to send out updates there are a few things we can do. There are a few files associated with Bluetooth on your Mac, don’t worry about breaking your Mac by deleting anything I recommend in this post because OS X will re-generate the files when it needs to.

In this post on Stack Overflow you can see there are two main files associated with the Bluetooth cache on your Mac. They’re located in two different places though so if this is your first time digging around in system folders you might get a little lost.

Here’s what to do:

There are two different Bluetooth files you need to find to clear the cache. Although I have already written a post on the first file, it uses Terminal, so here’s how to delete the file manually. Note that the file in the ByHost folder will have a few random characters in, but it will always start with 

First find these two folders:

  • /Library/Preferences can be found by opening Finder, clicking Go, then clicking on your hard drive, then choose Library, then choose Preferences.

    /Library/Preferences/ - file to delete
    /Library/Preferences/ – file to delete
  • ~/Library/Preferences/ByHost can be found by opening Finder, clicking Go while holding ALT on your keyboard, then clicking Library, then Preferences, then ByHost.

    ~/Library/Preferences/ByHost/ - file to delete
    ~/Library/Preferences/ByHost/ – file to delete
  1. Unpair your device from the MacID menu.
  2. Turn off Bluetooth.
  3. Delete from /Library/Preferences
  4. Delete files named from ~/Library/Preferences/ByHost (note that this is the user preference folder, not the system one)
  5. Restart BOTH your Mac and iPhone.
  6. Turn Bluetooth back on.
  7. Open both MacID for iOS and MacID for OS X to re-pair them.

What else can you do?

When I first started development on MacID I couldn’t get Bluetooth to turn off, the option was greyed out. Turns out there was a file lurking about that completely screwed everything up. After deleting a file in /Library/Preferences/SystemConfiguration called everything worked properly for me.

If that file exists on your machine, deleting it may help you here too.

You can also try my other post on clearing the cache using Terminal.

But why is this happening?

When MacID disconnects, either OS X or iOS (neither I nor Apple are sure which yet) is making the MacID app look like a new device by changing the identifier associated with it.

When you pair MacID for iOS with MacID for OS X, MacID for OS X stores the identifier and uses it to reconnect (so that it knows your iPhone is the right one). If that identifier changes, as above, then MacID will never be able to reconnect without re-pairing.

To make matters even more complicated, connection attempts never time-out with Bluetooth LE so it will forever sit at “waiting to attempt” assuming that your iPhone is just out of range.

During development this happened a few times, but always sorted itself out. Usually after clearing the cache as described above, and restarting both Mac and iPhone a couple of times.

I have now filed two separate bug reports with Apple and are sending them reports when I can.

Clear Bluetooth Cache for Core Bluetooth on Mac OS X

OS X really aggressively caches Bluetooth connections, which makes working with Core Bluetooth a royal pain.

After much searching about, I’ve found a way that seems to clear the cache properly. Turn off Bluetooth, open up terminal and copy and paste these three commands in order. You’ll have to enter your password after the first one, and you won’t see your password entered as you type (but it is being entered, so hit return once you’ve entered it and then copy the next two commands):

Once you’ve done that, you’ll need to restart. Voila, once you boot back up it should show you name changes on your iOS peripherals etc.

Can’t Turn *OFF* Bluetooth on Mac OS X – FIXED

Before continuing, remember the back up your data and I’m not responsible for any loss of data or damage to your computer.

[Jump to solution]

This was bugging me for quite some time, and although there are numerous posts on the web regarding this issue, nothing worked for me.

The problem I was having, was that Bluetooth was on, and couldn’t be turned off. In Bluetooth preferences in System Preferences the “Turn Bluetooth Off” button was greyed out and not selectable, and in the menu bar (sometimes called status bar), the option wasn’t there at all. Below are some screenshots of how it should look when everything’s working okay:

This is how it SHOULD look.
This is how it SHOULD look.
Turn Bluetooth Off didn't exist for such a long time :(
Turn Bluetooth Off didn’t exist for such a long time 🙁


This problem persisted through OS X 10.9 Mavericks to OS X 10.10 Yosemite, so at first I was concerned there was a problem with the Bluetooth radio in my computer.

As I say, there are plenty of posts on the web which come up when you search “can’t turn off bluetooth Mac“, and apparent fixes range from resetting the SMC, resetting PRAM, reinstalling kexts and changing .plist files, but nothing worked for me. I tried a lot of things.

So how did I fix it? Well, thankfully due to having OS X Yosemite on an external drive (for development testing while it was in beta) I could boot into that and see if Bluetooth worked properly there. Thankfully, it did, and that means that it’s not a problem with the Bluetooth radio in my Mac, rather a problem with my install. So I set about comparing all the Bluetooth related files hidden away I could find.

For some reason, on my faulty OS X install, in  /Library/Preferences/SystemConfiguration/ there was a file called In my working OS X install, this file didn’t exist. It was the only difference I could see, so I deleted it. After a restart, BEHOLD! The option to turn Bluetooth off re-appeared in both System Preferences and the menu bar.

Hopefully this helps others, as I found nothing to do with this on the web anywhere and there still seemed to be some people in forums that couldn’t fix theirs. Maybe this was the issue.

Detect Mac OS X Screen Lock & Unlock With Objective-C

I really couldn’t find very much on Google about how to detect when OS X has it’s screen locked. Screen lock is not the same as the log in window; screen lock is basically just a system overlay that keeps everything running but locked and secure, while on the other hand the log in screen completely logs the user out and kills the session.

Screen lock is a function that can be activated in the Security panel of System Preferences, but also the Keychain menu bar application can lock the screen for you, or you can press ctrl+shift+eject/power.

I finally stumbled upon this answer on StackOverflow, and in case that link ever dies I thought I would add it here too.

In your .m file you’ll need to set up a  NSDistributedNotificationCenter which listens for screen locked notifications:

And then of course implement the two selectors: