How to Play, Record and Merge Videos in iOS and Swift
Recording videos and playing around with them programmatically is one of the coolest things you can do with your phone. However, not nearly enough apps offer this ability, which you can easily add using the AV Foundation framework. AV Foundation has been a part of macOS since OS X Lion (10.7) and iOS since iOS 4 in 2010. It’s grown considerably since then, with well over 100 classes to date. This
View Debugging in Xcode 6
When you’re developing an app, sometimes there may be a bug with your views or auto layout constraints that isn’t easy to find just by looking through your code. It pays to know the technique of view debugging – and this has never been easier with the advent of Xcode 6. Instead of printing frames to the console and trying to visualize layouts in your head, you’re now able to inspect an entire view
CALayers Tutorial for iOS: Introduction to CALayers
If you’ve been programming for the iPhone, you’re probably really familiar with UIViews – buttons, text areas, sliders, web views, and more are all subclasses of UIView. But you might not know much about the technology that UIView is built upon: CALayers! At least I didn’t, for quite a while. It’s good to know a bit about CALayers, because you can use them to create some neat visual effects really
Core Graphics Tutorial: Lines, Rectangles, and Gradients
This is the first in a series of Core Graphics tutorials that will to take the mystery out of Core Graphics. You’ll learn the APIs step by step with practical exercises, starting by beautifying table views with Core Graphics. Core Graphics is a really cool API on iOS. As a developer, you can use it to customize your UI with some really neat effects, often without even having to get an artist invol
Beginning Storyboards in iOS 5 Part 2
Note from Ray: This is the third iOS 5 tutorial in the iOS 5 Feast! This tutorial is a free preview chapter from our new book iOS 5 By Tutorials. Matthijs Hollemans wrote this chapter – the same guy who wrote the iOS Apprentice Series. Enjoy! This is a post by iOS Tutorial Team member Matthijs Hollemans, an experienced iOS developer and designer. If you want to learn more about the new storyboardi
Beginning Storyboards in iOS 5 Part 1
Update 10/24/12: If you’d like a new version of this tutorial fully updated for iOS 6 and Xcode 4.5, check out iOS 5 by Tutorials Second Edition! Note from Ray: This is the second iOS 5 tutorial in the iOS 5 Feast! This tutorial is a free preview chapter from our new book iOS 5 By Tutorials. Matthijs Hollemans wrote this chapter – the same guy who wrote the iOS Apprentice Series. Enjoy! This is a
My App Crashed, Now What?
App crashes are a natural part of the development cycle. The challenge is to understand the real reason behind the crash and apply the proper fix, not just hide the crash. In this tutorial, you’ll look at some crash examples, investigate them, understand why they happened and, finally, fix them once and for all. Before you get started, it’s valuable to know some details about Swift so you understa
Beginning ARC in iOS 5 Tutorial Part 2
Note from Ray: This is the twelfth iOS 5 tutorial in the iOS 5 Feast! This tutorial is a free preview chapter from our new book iOS 5 By Tutorials. Matthijs Hollemans wrote this chapter – the same guy who wrote the iOS Apprentice Series. Enjoy! This is a post by iOS Tutorial Team member Matthijs Hollemans, an experienced iOS developer and designer. This is the second part of a two part tutorial se
Beginning ARC in iOS 5 Tutorial Part 1
Update 10/24/12: If you’d like a new version of this tutorial fully updated for iOS 6 and Xcode 4.5, check out iOS 5 by Tutorials Second Edition! Note from Ray: This is the twelfth iOS 5 tutorial in the iOS 5 Feast! This tutorial is a free preview chapter from our new book iOS 5 By Tutorials. Matthijs Hollemans wrote this chapter – the same guy who wrote the iOS Apprentice Series. Enjoy! This is a
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How To Make a Custom Control Tutorial: A Reusable Slider