Re: Debugging a specific object
Re: Debugging a specific object
- Subject: Re: Debugging a specific object
- From: Tim Hewett <email@hidden>
- Date: Wed, 7 Jul 2004 15:19:55 +0100
Louis,
Absolutely fantastic, thank you so, so much. Even better there is
a real life example of NSProxy in use in the developer examples
for 10.3, in /Developer/Examples/Foundation/ForwardInvocation,
virtually a case of "paste and go".
I never knew about NSProxy, but this is one very useful class, it
does exactly what you describe.
Thanks again, in 15 minutes I've now solved the problem which
several days have been thrown at (which was caused by there being
a hidden method in NSCell called when the view needs to discover
whether a cell needs to be redrawn when the window changes key
state - documentation please someone at Apple!).
Regards,
Tim.
On 7 Jul 2004, at 11:37, Louis C. Sacha wrote:
Hello...
You could create a simple subclass of NSProxy that either logs the
method that is being called in it's implementation of
forwardInvocation:, or has a breakpoint set within the
forwardInvocation: method.
Instead of using or returning your object directly, return the proxy
to the object.
If your object is a view that is created in a nib, you'll need an
outlet to the view and you can replace it with a proxy in the
awakeFromNib method by doing the following:
[[problemView superview] replaceSubview:problemView with:(NSView
*)proxyForProblemView];
Note: if you use the outlet for anything other than making the switch,
you'll want to change the outlet to point to the proxy as well.
Hope that helps,
Louis
Hi,
I'm just wondering if there is a way to have the XCode
debugger trace or break each time a particular Objective
C object receives a call to any of its selectors, including
those it has inherited from a higher class. I need to be
able to see how Cocoa is calling my object as it is being
displayed differently to how I want it to be, and so far
attempts to debug by overloading inherited methods have
been fruitless.
Normally XCode lets you break in specific methods, but
I need to have it do this for all methods in a specific object.
Any help greatly appreciated.
Regards,
Tim.
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