iOS & Android Development

Shell scripts to generate all required app icons and launch images on iPad and iPhone. iOS Human Interface Guidelines Custom Icon and Image Creation Guidelines https://developer.apple.com/library/ios/#documentation/UserExperience/Conceptual/MobileHIG/IconsImages/IconsImages.html Technical Q&A App Icons on iPad and iPhone http://developer.apple.com/library/ios/#qa/qa1686/_index.html ios-image-scripts  on GitHub

[[NSUserDefaults standardDefaults] setBool:YES forKey:@"WebKitShowDebugBorders"]; See WWDC 2012 Session Videos: Optimizing Web Content in UIWebViews and Websites on iOS

To see all notifications displayed to the console, add the following code inside the App Delegate: [[NSNotificationCenter defaultCenter] addObserver:self      selector:@selector(notificationReceived:) name:nil object:nil]; ... -(void)notificationReceived:(NSNotification*)notification {   NSLog(@"Notification:%@ from:%@",[notification name],      [[notification object] description] ); }

Did you face a  object file format unrecognized, invalid, or unsuitable error? Try that one: export CODESIGN_ALLOCATE="/Applications/Xcode.app/Contents/Developer/usr/bin/codesign_allocate" And then try again! Mobile Developer Tips

Unexpected data has been found. Mmh - sounds like alien artifacts :)

Using rsync to synchronize two directories recursivly, deleting extraneous files from dest dirs from left to right: rsync -r --delete source target If you would like to give it a secure try first use the dry run flag: rsync -n -r --delete source target See Linux Man Page

Some real nice and useful apps! UsingMac.com

There is a way to enable additional push debug messages: Enabling Push Status Messages on iOS To enable logging on iOS, install the configuration profile PersistentConnectionLogging.mobileconfig on your device by either putting the file on a web server and downloading it using Safari on your device, or by sending it as an email attachment and opening the attachment in Mail on your device. You'll be prompted to install "APS/PC Logging". Apple Developer TechNote Companion File

I thought Ligaya Turmelle's post on SQL joins was a great primer for novice developers. Since SQL joins appear to be set-based, the use of Venn diagrams to explain them seems, at first blush, to be a natural fit. However, like the commenters to her post, I found that the Venn diagrams didn't quite match the SQL join syntax reality in my testing. Coding Horror

Google Developer Day 2011: Bleeding Edge HTML5 (use Chrome for this!) HTML5 Wow The Guardian: HTML5 and native apps - the hybrid approach The Guardian Hybrid HTML5 Apps Are Less Costly to Develop Than Native ReadWriteWeb