Xcode 5运行旧项目时出现错误

Question

I have some problems when i am run any projects in Xcode 5 it gives error like

Duplicate interface definition for class 'ViewController'

it is happen in most of situations if i download any project from git hub or from other sources.

But if i run that project in earlier version of Xcode than its working fine. I have tried to run it Xcode 4.6 .

here is sample code that i run in Xcode 5 and gives error.

So whats problem with Xcode 5 ??

Answer 1

Solved:

By some Mistake i have Change System Header file from UIKIT > UITableViewController.h to

NS_CLASS_AVAILABLE_IOS(2_0) @interface ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>

SO in any project if there is a viewcontroller named ViewController it gives this error,

So i have look in old xcode and changed it to

NS_CLASS_AVAILABLE_IOS(2_0) @interface UITableViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>