Swift Snippet : Map Bool values with Generics in Swift

My problem

It often occurs while writing code that you need to assign a value of a certain type, based on the value of Boolean. To do this there are multiple ways, but the 2 most known are

1. The let’s-write-a-lot-of-code approach

I don’t like the first approach, because it creates a bloated codebase. A better way is to use the ternary operator (also known as the inline-if).

2. The one-line-star-developer (ternary operator) approach

You specify the Boolean you want to evaluate, add a question mark, followed by the value if the Boolean is true, followed by a colon, followed by the value if the Boolean is false.

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TNInfoBubble – Prisma app info bubble component

I was using the Prisma app (like half of the world probably) and noticed the info bubble when you swipe with your fingers to adjust the strength of the effect.

This is my implementation (written in Swift) of this component, which comes with the Prisma look out of the box.

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TouchID authentication tutorial for Swift

TouchID

A few years ago Apple introduced TouchID on the iPhone5S. Instead of asking your user for a password, you can just ask for their fingerprint (if their device has TouchID) which improves the UX by a gazillion times.

With the introduction of iOS7, it was impossible for a developer to use the fingerprint sensor for authentication. Luckily in iOS8, Apple provided us with an API to do so.

In this tutorial I’ll show you how you can integrate TouchID authentication in your application.

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New features in Swift 2

Swift 2

At the 2014 WWDC conference Apple announced Swift as a new language to write iOS app.  In February 2015 they released Swift 1.2, which fixed a lot of issues (especially with the compiler) and added new language features.

In June 2015 Apple announced at WWDC Swift 2, which will be made open source later this year.  In this post I will cover the new features in Swift 2.

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TNSwiftyCheckboxGroup, create checkbox groups in Swift

TNCheckboxGroup

Last year I published TNCheckboxGroup for Objective-C, but I had a few comments it didn’t work when using with Swift. So I just published a Swift version on Github. This versions leverages UICollectionView to handle big sets of checkboxes. TNSwiftyCheckboxGroup, create checkbox groups in Swift.

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Load assets from bundle resources in Cocoapods

The problem

Yesterday I stumbled upon a problem when I loaded a xib file within my development pod.

I checked StackOverflow and found a few threads with the same issue:

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Custom cells for UIPickerView with AutoLayout

For a project I needed to add a UIPickerView with custom cells using AutoLayout.  UIKit allows this via the UIPickerViewDelegate method pickerView(_:viewForRow:forComponent:reusingView).

The cell just needed an UIImageView and UILabel, so I thought it would be pretty straightforward to do, but there are some caveats you need to know. Big thanks to Tom Adriaenssen for pointing them out and not ruining my Sunday afternoon 🙂

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