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 🙂
Reading Time: 2 minutes (Update 2, 11-18-2013) I sold my Nexus 4 as I am getting my iPhone 5s. I still think Nexus 4 is a lot phone for the money ($199 before tax). Another feature I liked is the integration with google contacts, and google+ photo backup. I just found there’s an option on iPhone Google+ app for
Reading Time: < 1 minute Krugman, the Nobel economics laureate recently penned an article basically saying Apple is no good. I think he has one valid point on iTunes and the relatively closeness of Apple ecosystem. This reminds me of one thing, the cloud storage for consumers. Apple has this iCloud going for a few years, it can be used
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
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