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

Measuring performance


Performance is one of the most important things that you should take care of in your app. Your users need to use your app smoothly with no interruption or hanging. They have something to do, and they have to do it fast. When you develop your application, you develop it for a platform, not for a specific device. For example, you develop an iOS application, which will run on different types of devices with different CPU capabilities. That's why, measuring your app performance is very important, so you can find the areas that need optimization.

How to do it...

  1. In these measurements, we will not write any code. So, you can pick any Xcode project you have to run these experiments on.

  2. First, we will try to measure the CPU usage of an app to see how our app uses the multiple cores/threads that we have.

  3. Open the Xcode project, and click on Profile as we did in the preceding recipe.

  4. Choose Time Profiler from the list of instruments:

  5. Choose the device/simulator and the app from the...