Tutorial: Uploading Files Demystified

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network-upload-feat

Uploading files to a web server can be a tricky process because a lot depends on the web server’s features, abilities, and limits. This week’s tutorial aims to demystify some of the complexity behind this process and includes a sample project for download and testing.


Tutorial: Anonymous Functions and Closures

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closure

This week’s tutorial discusses the basics behind anonymous functions and closures in Lua. These methods provide a powerful way to keep track of variable instances on a per-function basis and, in the context of Corona SDK, pass parameters to functions in which you don’t control the passed-in content. Read further to discover how.


Tutorial: Methods for Positioning Text

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align-text-feat

At the basic level, creating and positioning text in Corona SDK is simple. However, when you need to position/align text in creative ways, things get a bit more complicated. In this tutorial, we’ll inspect the actual display object that Corona generates so that you can understand and achieve advanced positioning and alignment.


Tutorial: Continuous Actions in Corona

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playbutton

In some apps, you’ll need to perform some continuous action while the user’s touch remains on the screen. This could include a character running while the player holds down a “run” button, a space ship firing its lasers while the player’s finger is down, or some action being performed while the player holds the “X” button on a game controller. Today’s tutorial provides a foundation for this task.


Introducing the “Color Sample” Function

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dropper

For those Corona developers seeking a way to get the color of a specific pixel on the screen, you’re in luck! Starting with Daily Build #2106, our engineers have implemented the “display.colorSample()” function for this purpose. Read further to learn how it’s used.


Tutorial: Moving Objects Along a Path

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path-move-feat

There are many ways to move objects in Corona SDK. If you want to move an object from point A to point B, the simplest approach is to use a transition. But what if you need to move it along a path with multiple segments, like moving a knight on a chess board in its unique “L” pattern? This tutorial outlines how to achieve sequential movement via a series of queued transitions.