Recording summary · November 2015
How to make a pause and resume button for NSTimer in xcode 7!
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Overview
Daniel sets up an Xcode project with a UIViewController named Game, places a UILabel on the storyboard instead of an image, and animates it scrolling horizontally across the display using an NSTimer that wraps the position after passing the screen edge.
Daniel configures pause and resume buttons using IBActions to invalidate and restart the timer, testing the functionality while noting beginner status after starting coding approximately two weeks earlier.
Themes
Creating an Xcode project and setting up a UIViewController file named Game.
Using a UILabel instead of an image for movement across the storyboard.
Configuring header definitions for the label, buttons, and IBAction selectors.
Connecting storyboard UI elements and touch-up-inside actions to the Game class.
Implementing NSTimer and updating label center coordinates to scroll horizontally.
Resetting the label position to wrap around after passing the edge of the screen.
Handling pause with timer invalidation and resume by re-triggering the timer setup.
Concluding remarks acknowledging beginner status in coding.
Developments
Daniel initiates an Xcode project and creates a new file for the game view controller.
Daniel adjusts storyboard connections after noticing an initial setup failure.
Daniel copies timer initialization code from an earlier project into the implementation file.
Daniel runs the project in the simulator to verify label movement and looping.
Daniel tests the pause and resume functionality in the application.
Uncertainties & gaps
Whether the Xcode template view name or controller superclass was remembered correctly during initial creation.
How to implement label movement without referencing previous code.
The exact coordinate values required to wrap the label around the screen.