To generate QR code in iOS device, I’m using this library.

From the their GitHub repo, already got the instruction. Here I want to point out 2 things:

Usually I’m using NSLog to debug all sort of objects.
When I encounter UINavigationBar background color issue,
I loop through it’s subviews one by one. e.g.

I have a hard time on dealing with iOS 7 status bar.

In this example, I will set the status bar for each UIViewController

So now go to Info.plist file, and set View controller-based status bar appearance to YES

Introduction

Here is to shows you how can you add google map to your web page by JavaScript (not using iframe). Besides, you will also learn about searching, and marker dragging.

To draw the shape above by UIBezierPath

Create a UIView that fill with color, and leave an empty in center.

Description

Now we want to setup WordPress manually on shared hosting.

In this example shows, to display current date in a label in a specific format (e.g. 31/12/14 12:59PM)

You can see the date format

Bind event dynamically means to bind the event to new DOM element added from jQuery/JavaScript.

e.g.

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<div id="btn-wrapper">
    <button type="button" id="btn-1">Button 1</button>
    <button type="button" id="btn-2">Button 2</button>
</div>

Example

Below shows a forum web app. A post can only post by 1 user, its reply can reply by many users