Application crashes when working with core plot

Question

Unknown class CPTGraphHostingView in Interface Builder file.
2012-01-09 16:09:34.242 ChartArea[2595:207] -[UIView setHostedGraph:]: unrecognized selector sent to instance 0x4c064f0
2012-01-09 16:09:34.245 ChartArea[2595:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIView setHostedGraph:]: unrecognized selector sent to instance 0x4c064f0'

This is the error I am getting this evening. i am setting the class name of to CPTGraphHostingView to my uiview within interfacebuilder.

Ralli

try this in your code CPTGraphHostingView *hostingView = (CPTGraphHostingView *)self.view; – Taiga

CPTGraphHostingView *hostingView = (CPTGraphHostingView *)self.view; this is what i used in my code! – Ralli

its about the interface builder which is not reading. Saying unknow class its the problem even i given proper the class in my interface Builder for the UIView to get the Bar chart graph – Ralli

Answer 1

I had the same problem and this worked for me:

Select your project from the navigator panel in Xcode and then highlight the Build Settings tab. Filter the settings or locate ‘Other Linker Flags’ from this list and then add -ObjC -all_load to these settings

(From here: http://www.johnwordsworth.com/2011/10/adding-charts-to-your-iphone-ipad-app-using-core-plot/)

Elegiac

Typical case of 'RTFM'. I was wondering what those linker flags were for...the documentation of CorePlot really is the pits...ah well. – Rufena

@kiran, this answer should be approved. – Damien

Answer 2

It is possible that your view in ViewController is not a type of CPTGraphHostingView, so the view fails to cast.

It can fixed by creating exact instance of CPTGraphHostingView then add it to the ViewController's view.

CGRect frame = [[self view] bounds];

CPTGraphHostingView* graphHost = [[CPTGraphHostingView alloc] initWithFrame:frame];

[[self view] addSubview: graphHost];

Hope this help.

Quinine