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    <p>Yes, a better web search term (<em>NSColorWell "first responder"</em>) and I see others have struggled with <code>NSColorWell</code> and this same problem for a long time. Many old mailing list threads have covered this and saw 3 solutions:</p> <ol> <li><p><a href="http://www.cocoabuilder.com/archive/cocoa/82832-nscolorwell-changecolor-and-first-responder.html" rel="nofollow">http://www.cocoabuilder.com/archive/cocoa/82832-nscolorwell-changecolor-and-first-responder.html</a> Douglas Davidson suggests subclassing the potential first responder(s) so they ignore <code>changeColor:</code> (probably what I'll do)</p></li> <li><p><a href="http://www.cocoabuilder.com/archive/cocoa/3263-your-nscolorwell-got-in-my-nstext.html" rel="nofollow">http://www.cocoabuilder.com/archive/cocoa/3263-your-nscolorwell-got-in-my-nstext.html</a> Guy English suggests making the color well the first responder temporarily (what I tried but had problems due to color well being in a panel which I don't want becoming key)</p></li> <li><p><a href="http://www.cocoabuilder.com/archive/cocoa/180323-detecting-currently-active-nscolorwell.html" rel="nofollow">http://www.cocoabuilder.com/archive/cocoa/180323-detecting-currently-active-nscolorwell.html</a> Martin suggests cutting preventing the <code>changeColor:</code> call in the first place by posing as <code>NSColorPanel</code> and overriding a private method (closest to what I wanted, but more risk of app store rejection than I'm comfortable with)</p></li> </ol> <p><strong>UPDATE</strong>: I tried #1 but it turns out I can't override the first responder (<code>WebView</code> / <code>WebHTMLView</code> grrr). Going with #3, I put the following in a <code>NSColorPanel</code> category, made my color button set <code>panel.avoidsChangingFirstResponder=YES</code>, and it seems to work:</p> <pre><code>static char changeColorPatchAssociatedObjectKey; // address of this is used as a unique runtime value - (BOOL)avoidsChangingFirstResponder { NSNumber *changeColorPatchFlag = (NSNumber *)objc_getAssociatedObject(self, &amp;changeColorPatchAssociatedObjectKey); return changeColorPatchFlag &amp;&amp; changeColorPatchFlag.boolValue; } - (void)setAvoidsChangingFirstResponder:(BOOL)enablePatch { NSNumber *changeColorPatchFlag = (NSNumber *)objc_getAssociatedObject(self, &amp;changeColorPatchAssociatedObjectKey); if ((!changeColorPatchFlag &amp;&amp; enablePatch) || (changeColorPatchFlag &amp;&amp; changeColorPatchFlag.boolValue != enablePatch)) objc_setAssociatedObject(self, &amp;changeColorPatchAssociatedObjectKey, @( enablePatch ), OBJC_ASSOCIATION_RETAIN_NONATOMIC); } + (void)load { if (self == [NSColorPanel class]) { // patch implementation of _forceSendAction:notification:firstResponder: (use swizzle technique from MAKVONotificationCenter.m) // for one that calls original but with the last BOOL parameter conditionally changed to NO SEL methodSel = NSSelectorFromString(@"_forceSendAction:notification:firstResponder:"); Method method = class_getInstanceMethod(self, methodSel); IMP origImpl = method_getImplementation(method); IMP newImpl = imp_implementationWithBlock(^(void *obj, SEL s, BOOL isAct, BOOL isNotif, BOOL isFirstResp) { NSNumber *changeColorPatchFlag = (NSNumber *)objc_getAssociatedObject((__bridge id)(obj), &amp;changeColorPatchAssociatedObjectKey); if (changeColorPatchFlag &amp;&amp; changeColorPatchFlag.boolValue) isFirstResp = NO; ((void (*)(void *, SEL, BOOL, BOOL, BOOL))origImpl)(obj, s, isAct, isNotif, isFirstResp); }); class_replaceMethod(self, methodSel, newImpl, method_getTypeEncoding(method)); } } </code></pre> <p>I hope someone else finds this useful.</p>
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