DSBarChart - A simple objective-c bar chart library

DSBarChart is a simple objective-c bar chart library. 

You can find it on GitHub : https://github.com/dhilipsiva/DSBarChart

Xcode: warning: no rule to process file '$(PROJECT_DIR)/path/to/file' of type for architecture

I came across this warning.

warning: no rule to process file '$(PROJECT_DIR)/path/to/file' of type for architecture 

Silly me! I did something stupid. Looks like I have put a .h file in the list of compiled sources. The list should only have .m files. I dont know if we can put a .c file in it, but there should not be any other filetype. I fond that some developers even dragged Javascript files into the compiled sources. If you are facing the same problem, you should probably remove any non-.m files from list of compiled sources. Here is how you do it, considering you are running on Xcode4 or above.

• Open up your project target's "Build Phases" tab. (Click on the project, then the target's name, and then on the "Build Phases" tab).

• In the the compiled sources section, make sure that you dont have any files other than .m files.

Happy Hacking.

iOS 6 UI Interface Orientation - shouldAutorotateToInterfaceOrientation: Not Working

This post will soon be moved to here
This blog has moved to http://dhilipsiva.com/blog/
This post is outdated.

The method shouldAutorotateToInterfaceOrientation: is NOT supported in iOS 6. Its deprecated. Just in case if you are a newbie, who just stared working in cocoa, and wondering why is your view controller messed up in iOS 6 and perfect in iOS 5, just know that shouldAutorotateToInterfaceOrientation: is not supported anymore. Even though it may work well with Xcode 4 to 4.3 it will NOT work on Xcode 4.5. 

Apple provides a new method to get this thing done, in a much cleaner fashion. You use supportedInterfaceOrientations instead. It returns all of the interface orientations that the view controller supports, a mask of interface orientation values.

UIInterfaceOrientationMask Enum:

These constants are mask bits for specifying a view controller’s supported interface orientations.

Example:

Again, if you are newbie searching for an example, let me give you an example. Consider that you have to set your interface orientation to both left and right landscape orientations:

Using shouldAutorotateToInterfaceOrientation: method:

Using supportedInterfaceOrientations method:

UPDATE: This is a reply to an email which I received. Wanted to share this update.

     I am always glad to help anybody, if I have the time for it. Well from iOS 6.0, the system never asks for the supported interface orientations with the view controllers. It only asks the parent. In most of the cases, AppDelegate is always the parent. This is a line of code from the ReWire (http://www.rewireapp.com/) app that I have been working lately. I had a specific requirement. I had to set landscape mode only to VideoMeditationViewController. The rest of the video controllers should only support portrait orientation. So here is a solution:

-(NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{

    if([rwNavigationController.topViewController isMemberOfClass:[VideoMeditationViewController class]]){

        return UIInterfaceOrientationMaskLandscape;

    }

    else{

        return UIInterfaceOrientationMaskPortrait;

    }

 Yes, I know this is a hack. And I know this is not an elegant way of doing things. But trust me, this is the easiest.