Book Image

iOS Programming Cookbook

By : Hossam Ghareeb
Book Image

iOS Programming Cookbook

By: Hossam Ghareeb

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
About the Author
About the Reviewer
Customer Feedback

Drawing text, images, lines, rectangles, and gradients

In this section, we will learn to draw simple shapes, gradients, or even images. You will need to draw shapes, lines, and images to create custom components or to use in drawing apps where the user can draw shapes and generate an image of their drawing.

Getting ready

When you need to do any custom drawing in iOS, you will need the help of the Core Graphics framework. This framework is full of cool APIs that you can use to build awesome things. In this section, we will see how to use it to sketch custom drawings in custom UIView. In the following demo, we will draw a custom face with eyes, a nose, and a mouth.

How to do it...

  1. Create a new Xcode project with the Single View Application template with name the Drawing.

  2. Now, let's create a new custom view. Create a new class named CustomView, which is a subclass of UIView.

  3. Add the following function, where custom drawing will be done. Xcode might create it for you, but it will be commented, so...