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Understanding the Xcode interface


From:

Programming for Non-Programmers: iOS 7

with Todd Perkins

Video: Understanding the Xcode interface

With all of its features, Xcode can be quite intimidating. But once you get used to it, everything makes a lot of sense. Let's take a quick tour of the Xcode interface. At the top of the screen, there's something called the toolbar that contains useful buttons to help you navigate through your project quickly. You can change the settings in the toolbar by right-clicking anywhere in the blank space on the toolbar.
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  1. 5m 18s
    1. Welcome
      44s
    2. What you should know before starting this course
      1m 17s
    3. Related courses
      1m 8s
    4. Using the exercise files
      1m 19s
    5. Viewing the finished app
      50s
  2. 10m 24s
    1. Finding and installing Xcode
      35s
    2. Creating an Xcode project
      1m 55s
    3. Understanding the Xcode interface
      3m 54s
    4. Configuring Xcode for app development
      2m 14s
    5. Configuring the iOS Simulator for app development
      1m 46s
  3. 43m 43s
    1. Understanding how programming works
      2m 34s
    2. Understanding variables
      2m 56s
    3. Using primitive variables
      9m 10s
    4. Using pointer variables
      4m 51s
    5. Using instance variables
      5m 19s
    6. Connecting visual objects to variables
      8m 12s
    7. Placing a number variable in a string
      4m 33s
    8. Challenge: Create two variables
      54s
    9. Solution: Create two variables
      5m 14s
  4. 27m 14s
    1. Understanding functions, methods, and selectors
      4m 43s
    2. Using functions, methods, and selectors
      7m 1s
    3. Understanding parameter functions
      2m 10s
    4. Connecting a button to a function
      7m 47s
    5. Challenge: Create a counter app
      43s
    6. Solution: Create a counter app
      4m 50s
  5. 13m 38s
    1. Understanding conditional statements
      2m 35s
    2. Using conditional statements
      5m 21s
    3. Challenge: Build an on/off button app
      39s
    4. Solution: Build an on/off button app
      5m 3s
  6. 44m 59s
    1. Viewing the app's code structure
      2m 11s
    2. Setting up the user interface
      7m 9s
    3. Setting up variables and functions
      5m 8s
    4. Connecting all of the visual elements to code
      2m 59s
    5. Displaying tapped numbers in the calculator
      4m 47s
    6. Controlling when tapped numbers should not appear in the calculator
      3m 27s
    7. Making the Clear button clear all values
      1m 4s
    8. Setting the calculator to add or subtract
      4m 29s
    9. Showing the total when the equals button is tapped
      3m 40s
    10. Formatting a number with commas
      5m 25s
    11. Challenge: Add a multiplication button
      1m 5s
    12. Solution: Add a multiplication button
      3m 35s
  7. 24s
    1. Next steps
      24s

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Watch the Online Video Course Programming for Non-Programmers: iOS 7
2h 25m Beginner Apr 10, 2014

Viewers: in countries Watching now:

iOS app development is actually simpler than you might think—even if you're not an experienced programmer. In this course, Todd Perkins bundles the most important concepts in iOS into a quick course, explaining the development process in a visual way that people of any background can understand. No programming experience required! At the end, you'll have a finished app and a basic understanding of Xcode, the toolset for developing iOS apps; building blocks like variables, functions, and conditional statements; and interface design. You can also figure out if an iOS learning path is right for you, without a lengthy time commitment.

If you find you'd like to learn more, see iOS App Development Essential Training, Foundations of Programming: Fundamentals, or any of the other programming courses in our library.

Topics include:
  • Installing Xcode
  • Creating an Xcode project
  • Configuring the iOS Simulator
  • Understanding variables
  • Connecting visual objects to variables
  • Understanding functions, methods, and selectors
  • Connecting a button to a function
  • Using conditional statements
  • Setting up the user interface
  • Connecting code elements to build an app
Subject:
Developer
Software:
iOS
Author:
Todd Perkins

Understanding the Xcode interface

With all of its features, Xcode can be quite intimidating. But once you get used to it, everything makes a lot of sense. Let's take a quick tour of the Xcode interface. At the top of the screen, there's something called the toolbar that contains useful buttons to help you navigate through your project quickly. You can change the settings in the toolbar by right-clicking anywhere in the blank space on the toolbar. So I can chose to show icons with text, just the icons which I have now, or I can hide the toolbar.

I'm going to click to hide the toolbar. Sometimes you'll open Xcode and it will look like this. There won't be any buttons at the top of the screen. To get those buttons back, just right-click in the toolbar and choose Icon Only, or Icon and Text. And there are my icons. On the right side of the toolbar, there are two groups of three buttons each. The group on the left specifies how you'll see your code. For this course, I am always going to be using the left button which shows the standard editor. The right group of buttons control the view of your application.

Buttons highlighted in blue are objects that are showing. If I click this button, for example, on the left, then the left side of the screen will hide. If I click it again, it will come back. Same with the other two buttons. If you ever feel lost when you're watching this course, make sure these buttons match mine. In other words, that the same buttons are highlighted in blue. The center of the screen changes depending on the last thing that you clicked. As an example of that, look at the left side of the screen. There are several different files and folders in what is called the Project Navigator.

The folders here in Xcode are called groups, and usually mirror the folders on your hard drive. Now, I said usually because you can create a group of files without Xcode creating a folder for you. So just keep that in mind in the back of your head. If I click any one of these code files, I'll see the code up here in the middle of my screen. If I click Main.storyboard, I'm going to see options for editing the visual interface of my application. And by the way, the three main files we'll be working with in this course are Main.storyboard, ViewController.h, and ViewController.m.

One final word about the left area of the screen. In that area, there is a row of buttons at the top. This row of buttons changes what you see on the left side of the screen. Now for this course, I'm always going to have the Project Navigator selected, which is the button all the way on the left. However, if you're writing code and there's an error in your code and you run the code, Xcode will automatically take you to a different area. So you'll either see the error or the break points, or some other portion of this side of the screen.

So if you are missing those files and folders, again, look at my screen and see what I have selected in this area, which will always be this button here. So the main thing to remember about the Xcode interface is that the center of the screen changes with what you last clicked. Left side of the screen holds all your code files. And the top of the screen, the toolbar, has options for you to quickly perform commands and control the interface of Xcode.

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