Why is -[UISwitch superlayer] being called?

Posted by Jonathan Sterling on Stack Overflow See other posts from Stack Overflow or by Jonathan Sterling
Published on 2010-03-25T23:12:43Z Indexed on 2010/03/26 3:03 UTC
Read the original article Hit count: 608

Filed under:

objective-c

|

proxy

|

iphone

|

uitableviewcell

I've got sort of a crazy thing going on where I have an NSProxy subclass standing in for a UISwitch. Messages sent to the proxy are forwarded to the switch. Please don't comment on whether or not this is a good design, because in context, it makes sense as an incredibly cool thing.

The dealio is that when I try to add this object as an accessory view to a UITableViewCell, I get the following crash:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UISwitch superlayer]: unrecognized selector sent to instance 0x5889740'

Yes, I could just set the proxy's target as the accessory view, but then I would have to keep track of the proxy so that I could release it at the right time. So, what I really want is to be able to have the proxy retained by the table cell, and released when it is removed from the view just like a normal accessory view.

So, why is -[UISwitch superlayer] (a method which does not exist) being called, and how do I save the world?

© Stack Overflow or respective owner

Related posts about objective-c

Blocking access to websites with objective-C / root privileges in objective-C

as seen on Stack Overflow - Search for 'Stack Overflow'
I am writing a program in Objective-C (XCode 3.2, on Snow Leopard) that is capable of either selectively blocking certain sites for a duration or only allow certain sites (and thus block all others) for a duration. The reasoning behind this program is rather simple. I tend to get distracted when I… >>> More
Objective-C with some Objective-C++, calling a normal c++ method "referenced from" problem

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I made an Objective-C project for the iPhone. I had only one cpp class, the soundEngine taken from some Apple demo. Now I'm trying to merge OpenFeint which is coded in Objective-C++. As soon as I drop in the code without even referring to it from my code, when I hit Build, my Objective-C code… >>> More
Add an objective @property attribute in objective-c

as seen on Stack Overflow - Search for 'Stack Overflow'
Does anyone know of a way to add additional attribute types to the @property keyword without modifying the compiler? Or can anyone think of another way to genericize getter/setter creation? Basically, I have a lot of cases in a recent project where it's handy for objects to lazily instantiate their… >>> More
ObjectiveC Syntax for Specifying Protocol Name in Method Argument

as seen on Stack Overflow - Search for 'Stack Overflow'
What's the ObjectiveC syntax for specifying a protocol as an argument in a method? Say I have 2 protocols, MyProtocol and MyProtocolCB: @protocol MyProtocolCB <NSObject> - (void) func; @end @protocol MyProtocol <NSObject> - (void) register:(MyProtocolCB*) cb; @end I'm receiving this… >>> More
ObjectiveC builtin template system ?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am developing an iPhone application and I use HTML to display formatted text. I often display the same webpage, but with a different content. I would like to use a template HTML file, and then fill it with my diffent values. I wonder if ObjectiveC has a template system similar to ERB in Ruby. That… >>> More

Related posts about proxy

DNS lookup failures while accessing my website some proxy error

as seen on Server Fault - Search for 'Server Fault'
Here is a situation until today morning,every thing has been working perfectly fine with me. From past 6 months many of my domains wer accessible as http://site1.myserver.com http://site2.myserver.com http://site3.myserver.com http://site4.myserver.com All these were Reverse Proxy configurations… >>> More
Apache2 mod_proxy to remote Tomcat7 - slow response

as seen on Server Fault - Search for 'Server Fault'
Been stuck with this one for a few days. Will try to provide as much information as possible, but please feel free to ask for extra detail. I have 2 VMs behind a NAT, 192.168.0.100 and 192.168.0.102, both running Ubuntu 11.04 x64. The first one is mapped to the exterior and is our webserver, has… >>> More
How to set a proxy for Webbrowser Control without effecting the SYSTEM/IE proxy

as seen on Stack Overflow - Search for 'Stack Overflow'
How can I set a proxy for a Webbrowser Control without setting a proxy for IE. Basically I want my application to use a certain proxy however obviously I don't want to change user's IE proxy settings. >>> More
Difference between proxy server and reverse proxy server

as seen on Stack Overflow - Search for 'Stack Overflow'
What is the difference between proxy server and reverse proxy server? >>> More
[MAJ] Transformer APACHE 2.0 en Proxy HTTP - Comment utiliser le Module Proxy d'Apache

as seen on ASP-PHP.net - Search for 'ASP-PHP.net'
Modification du script suite ? l'alerte concernant la possibilit? offerte ? n'importe qui d'utiliser le moteur APACHE comme proxy sans aucun contr?le. >>> More