Swift – Protocol Oriented Programming – Byte Implementation (using Sequence and Generics)

I just uploaded a video on YouTube that teaches protocol oriented programming. You can check it out here:

Conforming to Sequence Protocol in Swift 4 to Create a Byte Data Structure

I just uploaded a video on YouTube that demonstrates how you can create a data structure, called Byte, that can hold 8 bits of data, from scratch, using Sequence. Happy watching!

ScrollView + UILabel (Scrollable label with Auto Layout)

I just created a tutorial on YouTube that shows you how you can create scrollable labels

Swift Weekly – Issue 10 – The Swift Runtime (Part 8) – Switch Statement

I was thinking of writing an article this week about the switch statement but i almost fell asleep half way through the article. that’s super boring. to write it even! so I thought I’ll do something more exciting and that is looking at how theswitch statement and its complementary case statement works.

Click here to read the full article on Swift Weekly’s GitHub page…

Swift Weekly is today’s most trending Swift repo on GitHub

Swift-Weekly is gaining some stance on GitHub really. i didn’t think this hobby project of mine could get so many people excited about Swift. Check it out here.

Swift Weekly – Issue 07 – The Swift Runtime (Part 5) – Operators

I thought I’d write about operators a bit in this issue. I don’t like to teach how operators work, but rather show you some cool things that we can do with operators. but then again, many websites do that already. you can just search online and find hundreds, if not thousands of blogs/websites that can teach you how to use operators and how to create your own in Swift. so how can i be different and offer something else? well, we will talk about operators in this issue and how to write your own, but, i will also show you how custom operators are compiled by the Swift compiler.

Continue reading this article on GitHub by clicking here.

iOS 8 Swift Programming Cookbook Videos, 50% off, only for 1 week

Hello interwebs,

I was informed today by O’Reilly that my title “iOS 8 Swift Programming Cookbook” videos is 50% off for a week

Here is a direct link to the video including the discount code

If you have no luck with the above link, just go to O’Reilly’s website and purchase the book with the discount code of VDWK

Ciao

Swift Weekly – Issue 02 – The Swift Runtime (Part 1)

In this edition, I wanted to write about arrays and dictionaires and take the easy route. But I thought to myself: wouldn’t be cool if _somebody_ dug deep into the Swift runtime for crying out loud? Then I thought that I cannot wait for somebody to do that so I’m going to have to do that myself. So here, this edition of Swift Weekly is about the Swift runtime. At least the basics.

Please note that I am using a disassembler + dSYM file. I am disassembling the contents of the AppDelegate with some basic code in it and then hooking my disassembler up with the dSYM file to see more details.

Also in this article I am testing the output disassembly of Xcode 6.1 on the x86_64 architecture, not ARM which is available on iOS devices.

Continue reading this article on Swift Weekly’s Github page: https://github.com/vandadnp/swift-weekly/tree/master/issue02

Building and Running Python Scripts with Xcode 6.1

Follow these steps:

1. Open Xcode
2. Create a new project and select Other from under the OS X category when the dialog appears, and then choose External Build System:
   

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3. In the next page, give your project a name “product name” and then in the “build tool”, choose the path of your Python interpreter. If you don’t know where your Python interpreter is, open Terminal and type in which python to get the path to the interpreter, like so:
   

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4. Then save your project on disk
5. From the Product menu, choose Scheme and then Edit Scheme or just Option-click the little Play button on top left of Xcode. Now you should see the Edit Scheme screen which looks like this:
   

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6. Now tap on the Info tab on top of the dialog and then press on the Executable combo-box (which currently says “None”) and then from the list, choose “other…”
   

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7. An open-dialog will appear waiting for you to select your build tool, again! This is a bug in Xcode. So press the Cmd+Shift+G button in the open-dialog and when the “Go to the folder” dialog appears, enter the path of your Python interpreter again like so:
   

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8. Once you are done, press the Go button and then press the Choose button
9. Back in the Edit Scheme dialog, uncheck the “Debug executable option as you don’t want Xcode to attach the LLDB debugger to Python. That’s not useful. This step is very important.
   
   

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10. Now tap on the Arguments tab and then under the “Arguments Passed on Launch”, press the + (plus) button and then type in “test.py” without the quotation marks, like so:
    

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11. Now tap on the Options tab and then under the “Working directory” section, tap the “Use custom working directory” and then tap on the little Folder button. Once the open-dialog appears, choose the root folder of your Xcode project:
    

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12. Now press the Close button to close the Edit Scheme dialog
13. Press the Cmd+N combination on keyboard or just select from the menus, File->New->File…
14. In the New file dialog, from the left hand side, choose OS X and then Other and then choose Empty and then press the Next button:
    

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15. Name your file “test.py” (without the quotation marks) and then ensure that you are saving it under your project’s main folder, the same folder that you set your “Working directory” to a few steps ago. Once you are done, press the Create button.
    

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16. Write a simple Python script in your “test.py” file like so:
    

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17. Now run your application and have a look at the console in Xcode to see your Python script successfully executed:
    

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That was it really. Good luck everyone. If you have any questions, just let me know.

Xcode 6.1, beta 2

I have now updated all example codes of O’Reilly’s iOS 8 Swift Programming Cookbook to be compatible with Xcode 6.1, Beta 2 and iOS 8.1. You can access all the sample codes on Github.

You can also get the video version of the book here.