Monday, March 3, 2014

A simple copying directory function

function recurseCopy($src, $dst, $excludeFileType=array()) {
    $dir = opendir($src);
    mkdir($dst, 0755, true);
    while(false !== ( $file = readdir($dir)) ) {
        if (( $file != '.' ) && ( $file != '..' )) {
            if ( is_dir($src . '/' . $file) ) {
                $this->recurseCopy($src . '/' . $file, $dst . '/' . $file, $excludeFileType);
            else {
                $filePathInfo = pathinfo($file);
                $ext = '';
                    $ext = $filePathInfo['extension'];
                if(empty($ext) || !in_array($ext, $excludeFileType)){
                    copy($src . '/' . $file, $dst . '/' . $file);

Friday, February 28, 2014

How to get WordPress posts permalinks using SQL(database) alone

SELECT wpp.post_title, wpp.post_type, wpp.guid, wpp.post_date, CONCAT( wpo_su.option_value, REPLACE( REPLACE( REPLACE( REPLACE( REPLACE( wpo.option_value, '%year%', DATE_FORMAT( wpp.post_date, '%Y' ) ) ,'%monthnum%', DATE_FORMAT( wpp.post_date, '%m' ) ) , '%day%', DATE_FORMAT( wpp.post_date, '%d' ) ) , '%postname%', wpp.post_name ) , '%category%', wpp.post_type ) ) AS permalink
FROM wp_posts wpp
INNER JOIN wp_options wpo ON wpo.option_name = 'permalink_structure'
INNER JOIN wp_options wpo_su ON wpo_su.option_name = 'siteurl'
wpp.post_type = 'post'
OR wpp.post_type = 'page'
AND wpp.post_status = 'publish'

Tuesday, February 25, 2014

A Target campaign

A micro site that allows user to get a free mp3 download after Facebook authentication. The site is written in PHP with MySQL database.
Application features:
  • Limits one download per user. 
  • Integration with real-time music purchasing and download.
  • Location restriction by user IP address.
  • Integration with Email injection services.
  • Twitter, Instagram and Facebook user authentication process.
  • Works on both desktop and mobile web browsers.
  • Supports high volume of traffic.

Monday, November 18, 2013

How to get iDevice hardware model

size_t size = 100;
char *hw_machine = malloc(size);
int name[] = {CTL_HW,HW_MACHINE};
sysctl(name, 2, hw_machine, &size, NULL, 0);
NSString *hardware = [NSString stringWithUTF8String:hw_machine]; //e.g. iPhone4,1

Wednesday, November 6, 2013

How to resign an IPA with new bundle Id, certificate and entitlements

  1. Create an Entitlements.plist using Xcode
    1. Include the following keys values in the plist file. 
      1. application-identifier (String) ->
      2. get-task-allow (Boolean) -> NO
  2. Put the Entitlements.plist in the same folder of the app.ipa file
  3. Unpackage the app
    1. unzip app.ipa
  4. Delete current code signature
    1. rm -rf Payload/
  5. Open Payload/ in Xcode and update the bundle ID(CFBundleIdentifier)
  6. Copy the new .mobileprovision file to Payload/
  7. Run the codesign command
    1. codesign -f -s "iPhone Distribution: Company Certificate" --resource-rules Payload/ --entitlements Entitlements.plist Payload/
  8. Repackage the app
    1. zip -qr app-resigned.ipa Payload/
Sample Entitlements.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "">
<plist version="1.0">

Tuesday, October 8, 2013

How to add parallax effect to your apps

UIInterpolatingMotionEffect *interpolationHorizontal = [[UIInterpolatingMotionEffect alloc]initWithKeyPath:@"center.x" type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis];
interpolationHorizontal.minimumRelativeValue = @-10.0;
interpolationHorizontal.maximumRelativeValue = @10.0;

UIInterpolatingMotionEffect *interpolationVertical = [[UIInterpolatingMotionEffect alloc]initWithKeyPath:@"center.y" type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];
interpolationVertical.minimumRelativeValue = @-10.0;
interpolationVertical.maximumRelativeValue = @10.0;

UIMotionEffectGroup *interpolationGroup = [[UIMotionEffectGroup alloc]init];
interpolationGroup.motionEffects = [NSArray arrayWithObjects:interpolationHorizontal, interpolationVertical, nil];

if([aView respondsToSelector:@selector(addMotionEffect:)]){
    [aView addMotionEffect:interpolationGroup];

Tuesday, September 10, 2013

Experiencing Sencha Touch: VW Dealer app

Sencha Touch, a high-performance HTML5 mobile application framework. We used Sencha to build an iPad application that allows Volkswagen field managers and dealers to show customers everything about VW cars.
Application features:
  • Work offline.
  • Update application data without reinstalling the app.
  • Support multiple events.
  • Capture customer information locally and upload to server later on.
  • Vehicle gallery and videos slide show.
  • Vehicle trim specs, color specs, technical specs, pricing.
  • Vehicle comparison. 
Since this app needs to work with iPad 1st generation, memory management became very important. We spent good amount of time to tweak the app to have small memory footprint. 

The app is being used at places with no wifi. When the application is installed, it downloads all data from a server and stored on the iPad using HTML5 local file system feature. App uses high quality gallery images, so using manifest method would exceed the browser storage limit.

The app itself has a version control built-in so every update is an incremental update instead of re-download all data again.

Customer data are stored on the app using Sencha store data model.

2013 Sep updates: Redesign user interface!