Beginning iOS 8 Programming with Swift by Simon Ng

By Simon Ng

A pragmatic consultant for Beginners
If you need to create an app yet don't be aware of the place to start, this e-book covers the total element of fast programming and iOS eight improvement and indicates you each step from an idea to a true app on App shop. so much programming books begin via instructing the basic programming ideas. At AppCoda, we think programming may be enjoyable to profit. rather than simply elaborating the theories, you'll research 'by doing' correct from the start. This useful studying technique has received optimistic suggestions from tens of hundreds of thousands of our weblog readers.

This publication includes a lot of hands-on routines and initiatives. It assumes you've got little or maybe no past programming adventure. you are going to first create an easy app, then prototype an app proposal, and later upload a few gains to it in every one bankruptcy, until eventually a true app is equipped. in the course of the strategy, you are going to grasp quick programming and iOS eight app improvement.

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To edit the label of the button, double-click it and name it “Hello World”. If you hit the Run button to run the app, you’ll see a Figure 1-16. Renaming the button Hello World button in the simulator as shown in figure 1-17. Cool, right? However, when you tap the button, it does nothing. We’ll need to add a few lines of code for displaying the “Hello, World” message. 30 This is the beauty of iOS development. The code and user interface of an app are separated. You’re free to design your user interface in Storyboard and prototype an app without writing any lines of code.

Click the indicator icon next to the issue and a pop-over shows you a number of solutions. In this case, select the “Update Frame” option and click “Fix Misplacement” button. The button will then be moved to the center of the view. 56 Figure 3-7. Resolving misplacement issue The kind of layout issue may be unusual. I just wanted to demonstrate how to find the issues and fix them. As you build your UI using Auto Layout either in your own app or working through the exercises, you will know how to resolve layout issues easily and quickly.

However, the Bottom Layout Guide varies. Sometimes we embed a tab bar (we’ll discuss in later chapter) in the view controller, the Bottom Layout Guide will refer to the top of tab bar. For the Top Layout Guide, it sits at 20 points (which is the height of the status bar) from the top of the Figure 3-14. Top layout guide view. Again the guide varies. If the view controller is embedded in a navigation controller, the guide sits below the navigation bar. If you’re confused, the best way is to check out the guide in Interface Builder.

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