Reading Time: < 1 minute (Update 02-06-2014) My UP band died. I fully charged it, tried both soft reset and hard reset, as discussed below, but seems could not revive it. The following was written on Nov. 14, 2013. I have a bit more experience with UP band since then, note Jawbone also came up with new UP 24, which
Reading Time: 2 minutes (Update 05-10-2016) Came across this post about hosting your own Parse server from raywenderlich.com (Update 01-28-2016) All good things came to end (see today’s Facebook announcement on shutting down Parse on January 28, 2017, a year from today). They also listed migration path. A lot discussion on reddit on this topic. Also a tutorial on
Reading Time: 2 minutes Recently I’ve worked on updating one of my app to make it works on iOS 7, and have encountered some roadblocks. Push view controller problem/symptom: the new view controller pushed from old view controller shows no content, on iOS 7. It works fine on iOS 6.1 (the deployment target is still iOS 6.1). solution/diagnose: I
Reading Time: < 1 minute Arguably iOS 7 bring most drastic changes to iOS in last 3 to 5 years. With new features like dynamics in UIKit, (more/new) auto layout, it creates both opportunities and challenges for developers. But I know the Mac/iOS developer community is best, in terms of sharing knowledge. With the iOS 7 out just 2 weeks
Reading Time: < 1 minute Good idea? Bad idea? I read this article on LATimes talking about how the kids hacked the MDM software on school issued iPads. The topic was on security. Obviously the MDM provider did not do a through job, as explained by an article on alertboot here. This reminds me of another question, the iPad in
Reading Time: < 1 minute (Update 09-27-13) I think it’s a bit silly people are all over the motion-sickness caused by iOS 7. I found the new Safari “color effect under address bar when the web page moves up” cool, it took me a while to figure out why the color on the top is changing sometimes (very subtle π
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 Today I found out I made a dumb mistake while deleting an NSMutableArray. for(int ii=0; ii
Recent Comments