Building a wrapper for an iOS library. So far so good. Except in a method
that returns an object. Method always returns NSObject instead. The same
story is in delegate that has an object parameter .
For example,TCConnection is defined in Monotouch binding project as
//@interface TCConnection : NSObject
[BaseType (typeof(NSObject))]
public interface TCConnection
{
[ExportAttribute("state")]
int state {get;}
//...
}
class TCDevice is defined as follows
//@interface TCDevice : NSObject
[BaseType (typeof(NSObject))]
public interface TCDevice
{
[ExportAttribute("initWithCapabilityToken:delegate:")]
IntPtr Constructor(String token, TCDeviceDelegate d);
[Export("connect:delegate:")]
TCConnection Connect([NullAllowed] NSDictionary param, [NullAllowed]
TCConnectionDelegate del);
}
<http://stackoverflow.com/questions/12450057/how-to-define-that-a-function-r
eturns-an-object-when-building-binding-for-a-ios>
Building a wrapper for an iOS library. So far so good. Except in a method
that returns an object. Method always returns NSObject instead. The same
story is in delegate that has an object parameter .
For example,TCConnection is defined in Monotouch binding project as
//@interface TCConnection : NSObject
[BaseType (typeof(NSObject))]
public interface TCConnection
{
[ExportAttribute("state")]
int state {get;}
//...
}
class TCDevice is defined as follows
//@interface TCDevice : NSObject
[BaseType (typeof(NSObject))]
public interface TCDevice
{
[ExportAttribute("initWithCapabilityToken:delegate:")]
IntPtr Constructor(String token, TCDeviceDelegate d);
[Export("connect:delegate:")]
TCConnection Connect([NullAllowed] NSDictionary param, [NullAllowed]
TCConnectionDelegate del);
}
Everything is compiled nicely to a dll. When I use the dll in other project,
I call
MyTCDeviceDelegate d=new MyTCDeviceDelegate();
String token="XXXXX";
TCDevice dev=new TCDevice(token, d);
TCConnection conn=dev.Connect(null,null);
The last line always throws Invalid Cast exception.It looks like the method
returns NSObject.
What I am missing here?
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