Sometimes, we meet with very little issues, which can be solved so easy, but the way to find the solution is always longer and frustrating. This "white UITextField" is also a frustrating Problem. Click in the UITextField and edit the earlier Text, but how, if you can't see that? More click, of course, help on it, but there is a final solution. Xcode 7.2, IOS 9.2

After you have upgraded OS X EL Capitan Upgrade and Xcode 7, you get an issue at IOS 9 SDK with Frameworks directory.

Click for solution.

In this IOS 9, Xcode 7 tutorial, I continue my Core Data tutorial, with a very important part: iCloud sync. First, we need to enable iCloud at the app with a valid developer Profile! After that we can create a new Store and checked that the user is signed into iCloud or not. If yes, we migrate store to iCloud.

If you switch to IOS 9 target, you will get some deprecated warnings, which will be later deleted at SDK, so this is the perfect time to solved these. Instead of UIAlert you need to use UIAlertController, or you need to use in AppDelegate "[NSManagedObjectContext alloc] initWithConcurrencyType", and you must to use "metadametadataForPersistentStoreOfType" with options. I created a list with some useful changes. 

If your App uses a lot of colors, and you need to write conditions in all View Controller to define which color to display, it should all be completed within UIColor subclass. So instead e dozens of lines of code in every ViewController, you can write only 2-3 lines code. Now I show it in Objective-C.