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    <p>There's a now deprecated method in the NSSavePanel's delegate with a method name of:</p> <p><code>- (BOOL) panel: (id) sender shouldShowFilename: (NSString *) filename]</code></p> <p>which can be used to tell the save panel to <strong><em>not</em></strong> display certain filenames. </p> <p>Details about how to use it can be seen in <a href="https://developer.apple.com/library/mac/#qa/qa1468/_index.html" rel="nofollow noreferrer">this Apple QA technote</a>, which details how to do exactly the opposite of what you are trying to do (their example is how to choose any file but ignore packages, but you may be able to flip the internal logic around).</p> <p>Now, remember that I said that the method is "deprecated". The NSSavePanel header file says this:</p> <pre><code>/* This method is deprecated in 10.6, and will be formally deprecated */ /* in a future release. Use panel:shouldEnableURL: instead */ - (BOOL)panel:(id)sender shouldShowFilename:(NSString *)filename; </code></pre> <p>What NSOpenSavePanelDelegate's <a href="http://developer.apple.com/library/mac/documentation/Cocoa/Reference/NSOpenSavePanelDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/NSOpenSavePanelDelegate/panel:shouldEnableURL:" rel="nofollow noreferrer"><code>panel:shouldEnableURL:</code></a> apparently does it merely allow or disallow the file from being selectable. </p> <p>To future-proof your app, you may need to do the <a href="https://stackoverflow.com/questions/3697058/when-to-use-respondstoselector-in-objective-c"><code>respondsToSelector</code> trick</a> to make sure "<code>shouldShowFilename</code>" is still available as an option before using the less desirable "<code>shouldEnableURL</code>" method.</p>
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    1. PONSOpenPanel allowed to select packages but not show contents
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    1. USMichael Dautermann
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    1. COthanks, used your tips to get to my answer...
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      1. USFerguzz
    2. COI'm confused. I understand how to use respondsToSelector when I'm possibly calling a deprecated function. But in this case, NSOpenPanel is making the call via its delegate. And I don't believe there is a way to define a method at run time based upon respondsToSelector. So how am I supposed to get NSOpenSavePanelDelegate to call shouldShowFilename if it's safely available? BTW When you define both, it seems to prefer shouldEnableURL to shouldShowFilename, which isn't surprising.
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      1. USGreg Young
 

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