Xcode compile error

-symbol(s) not found for architecture i386

Have had this error a number of times at compile time.  There are no apparent errors or warning prior to compile, but it fails nonetheless.
You need to read the bottom portion carefully for clues.  This time it said CoreDataTableViewController was not found.  I deleted these files and re-imported them, and it worked!
Go figure, apparently the original import routine (drag files to file organizer) didn't work.

duplicate symbol _OBJC_IVAR_$ - Xcode linking error

I received this error today after inputing Apple's "Your third iOS Program", SimpleTextEditor.xcodeproj.
After struggling thru the error message, and replacing a lot of the code with cut/pastes from Apple, I went to their forum, and found the problem.

I mistyped this statement - #import "STESimpleTextDocument.m" as an import for the DetailViewController header file. It should be .h

 Forums rock!

Citizen Science Links

The following icons link to citizen science, crowdsourcing projects.  These web sites encourage participation by people via websites that perform functions, search for planets, or resources to help assisting your interests and hobbies.  They are way cool, and have the potential for great things to be accomplished.

Check and join, they're way cool!

New Tricks n Tips for your iPad, iPhone & Xcode

The following links are for some good reference info on how to do various unusual things on your iThings and also Xcode.

Backing up your iPad or Iphone - This will allow you to load different versions of the iOS, secure your apps & data and .... or just follow this;

iTunes

How to back up

iTunes can create backups of your iOS device when you:

• Sync with iTunes (disabled if you have iCloud backup turned on)
• Right-click (or Control-click) the iOS device in iTunes under Devices and choose Back Up

Use these steps to manually back up your iOS device using iTunes:

1. Connect your iOS device to a computer with the latest version of iTunes installed
2. Select your iOS device in iTunes under Devices
3. Right-click (or Control-click) the device and select Back Up

 Turn on Photo Stream - This automatically syncs photos on your Mac, iPhone & iPad via iCloud;
in your iPad; go to  Settings - Photos - Photo Stream ON

KittyGate2000

New device to separate our feuding cats. Simply constructed with a set of roller shades & a couple pieces of wood. Actual photo to follow.