Reading Time: < 1 minute A little over a year ago, I started working full time as iOS developer for a mining company. One of the first projects is create spreadsheet like application on iPad. At that time there is no UICollectionView, and I found GMGridView to be interesting. I did look at an existing product called iOS Data Grid

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Reading Time: < 1 minute Disclaimer: not including any commercial providers here, as they are usually more expensive. With today’s online learning resources (raywenderlich.com tutorial, stackoverflow to say a few), it’s fairly straightforward for an experienced developer to pick up Objective C and UIKit, etc. I think the value of classes is mostly from interaction with instructors, and do some

Reading Time: < 1 minute http://mattgemmell.com/2013/06/12/ios-7/ http://blog.mengto.com/ios-7-transition-flat/ http://designmodo.com/flat-design-principles/ http://www.marco.org/2013/06/27/ios7-as-defense http://whoo.ps/2013/05/12/flat-design-is-great-for-mediocre-designers-like-me

Reading Time: < 1 minute 1. Selector http://stackoverflow.com/questions/3482344/what-actually-is-a-selector An example http://stackoverflow.com/questions/10758926/add-selector-to-uibutton [button addTarget:yourObject action:@selector(yourMethod:) forControlEvents:UIControlEventTouchUpInside]; 2. NSNotifications In a way (and in syntax too) it’s similar to Selector, but used in different settings. example here http://www.cocoanetics.com/2009/08/love-to-be-notified/ 3. Delegate methods e.g., UIAlert view, UITextField delegate customized method (example) http://www.raywenderlich.com/29474/ipad-for-iphone-developers-101-in-ios-6-custom-input-view-tutorial 4. Blocks https://developer.apple.com/library/mac/#featuredarticles/BuildingWithBlocks/_index.html example http://stackoverflow.com/questions/7180552/implementing-a-method-taking-a-block-to-use-as-callback 5. GCD My favorite example here. http://www.fieryrobot.com/blog/2010/07/10/a-watchdog-timer-in-gcd/

Reading Time: < 1 minute I visited China with my family a few weeks ago. Shanghai is the flight stop where we arrive and depart. We stayed at the Courtyard Xujiahui, and Four Points by Sheraton at Pudong during our short stay in Shanghai, a few weeks ago. As I have family and esp. little kid nowadays, I prefer western

Reading Time: < 1 minute It was the first time I brought my wife and my daughter there. The weather was a bit hot, as I went there after 9:30 am. We bought the typical things: ribs and eggs from Bobbi (live spring farm), tomato, beans and cucumber from amish farmer. Serenity enjoyed her bagel and apple at the picnic

Reading Time: < 1 minute We took a 2 weeks China trip and came back last Monday evening. A bit exhausted, and at the end of the trip, our daughter got sick, she said she got tummy ache, and needed to go to restroom (lavatory) every 10 min. The fun part of being parents. Some more serious thoughts 1) My

Reading Time: 2 minutes Yoyo likes to talk a lot, and this morning she said something quite funny: daddy, you should not drink coffee or alcohol anymore, because they won’t help you grow. You should drink some milk. Then she handed her milk bottle to me. Sometimes, she likes to use some big words like “even”, “actually”, we think

Reading Time: < 1 minute Today I found out I made a dumb mistake while deleting an NSMutableArray. for(int ii=0; ii