Book Image

iOS Programming Cookbook

Book Image

iOS Programming Cookbook

Overview of this book

Do you want to understand all the facets of iOS programming and build complex iOS apps? Then you have come to the right place. This problem-solution guide will help you to eliminate expensive learning curves and focus on specific issues to make you proficient at tasks and the speed-up time involved. Beginning with some advanced UI components such as Stack Views and UICollectionView, you will gradually move on to building an interface efficiently. You will work through adding gesture recognizer and touch elements on table cells for custom actions. You will work with the Photos framework to access and manipulate photos. You will then prepare your app for multitasking and write responsive and highly efficient apps. Next, you will integrate maps and core location services while making your app more secure through various encryption methods. Finally, you will dive deep into the advanced techniques of implementing notifications while working with memory management and optimizing the performance of your apps. By the end of the book, you will master most of the latest iOS 10 frameworks.
Table of Contents (22 chapters)
iOS Programming Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Working with Autolayout and constraints


Autolayout is one of the best things that happened in iOS. I still remember the old days when I had to write too much code just for positioning views on screen and change their their sizes to be relative to the screen size. With Autolayout now, you can do a lot of things and add constraints to your views without writing a single line of code. Mastering Autolayout will help you to avoid the hassle of different screen sizes and even orientation changes.

Getting ready

In the demo project that we are going to do in this section, we will use the same project used in the preceding section to add some Autolayout constraints to see what they can do. You can use Xcode 8.0 as recommended, but you still can use earlier versions; however, you will notice some differences in screenshots.

How to do it...

  1. If you run the demo app we created in the previous section, you will see that views are not aligned properly, as we didn't add any constraints. For example, check how...