Re: NSOpenPanel may not respond to setDirectoryURL?
Re: NSOpenPanel may not respond to setDirectoryURL?
- Subject: Re: NSOpenPanel may not respond to setDirectoryURL?
- From: Howard Moon <email@hidden>
- Date: Thu, 08 Mar 2012 11:04:11 -0800
On Mar 8, 2012, at 10:10 AM, Howard Moon wrote:
>
> On Mar 8, 2012, at 9:17 AM, Mike Abdullah wrote:
>
>>
>> On 8 Mar 2012, at 14:54, Howard Moon wrote:
>>
>>> On Mar 8, 2012, at 6:21 AM, Mike Abdullah wrote:
>>>>>
>>>>> I'm really not that familiar with Objective-C and Cocoa yet, but I'm getting a warning for something that works fine, and I hate warnings. The warning is:
>>>>>
>>>>> 'NSOpenPanel' may not respond to '-setDirectoryURL:'
>>>>>
>>>>> I know that setDirectoryURL: is an NSSavePanel message, but NSOpenPanel derives from NSSavePanel, so why does it give me this warning? As I said, it works fine (i.e., the open panel starts out in the folder I specified). Is there a case where it WON'T work? If not, then is there a way to prevent the warning?
>>>>
>>>> That method was introduced in 10.6. Are you perhaps building against the 10.5 SDK or even earlier?
>>>>
>>>
>>> Ah, yes, that's it. But I do need to support 10.5. What can I use that works in 10.5 thru 10.7?
>>
>> Options:
>>
>> A)
>> Bump the SDK setting to 10.6, keeping the deployment target at 10.5. Don't call any 10.6-only methods when running on 10.5. (i.e. check -respondsToSelector: or similar)
>>
>> B)
>> Declare the new methods as categories in headers, but don't actually implement the methods. That will tell the compiler how to call those new methods. Once again, don't call 10.6-only methods while running on 10.5
>>
>> C)
>> Fallback to older, deprecated APIs. e.g. -directory
>>
>
>
> Hmmm... I'm building a VST3/vstgui4 plug-in, and I think the base SDK and deployment targets are set as required, like this:
>
> SDKROOT = macosx10.5
> SDKROOT[arch=x86_64] = $(DEVELOPER_SDK_DIR)/MacOSX10.6.sdk
>
> When I build either a 32-bit or 64-bit build, while running on 10.6, it executes -setDirectoryURL with no problems. I haven't tried running in 10.5 yet.
>
> Can I keep my above settings, but do this?
>
> if ([openPanel respondsToSelector:@selector(setDirectory)])
> [openPanel setDirectory:nsParentPath];
> else
> {
> NSURL* nsParentURL = [NSURL fileURLWithPath:nsParentPath isDirectory:YES];
> [openPanel setDirectoryURL:nsParentURL];
> //[nsParentURL release]; // No...crashes! must be used by panel
> }
That code works in either 32-bit or 64-bit under 10.6, but it seems to be throwing an exception or something on 10.5(.8), because when I execute it, no dialog appears and I can continue along with other work in my plug-in, as if nothing had happened. (This is all executed from a button press in a sheet.)
I need to be able to set the default directory in whatever OS I'm in, whether it's 10.5, 10.6 or 10.7. Will option B above allow that? (I'm not sure what that actually means... I'll have to look up categories, I guess. But any hint would be appreciated.)
-Howard
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