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POHow to handle assertion failure on NSButton lockFocus when using modalWindow on quit?
 

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  1. POHow to handle assertion failure on NSButton lockFocus when using modalWindow on quit?
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    <p>a button's <code>IBAction</code> in <strong>windowA</strong> calls <code>runModalForWindow:windowB</code>.</p> <p><strong>windowB</strong> becomes key and modal.</p> <p><strong>windowB</strong> has a popUpWindowDatePicker which calls <code>stopModal</code> upon display, and then popUpWindowDatePicker becomes key, and <strong>windowB</strong> resigns key and is not modal. no window is modal at this point.</p> <p>when popUpWindowDatePicker is dismissed, its <code>didResignFirstResponder</code> method sets a boolean to YES. <strong>windowB</strong> then becomes key, and <strong>windowB</strong>'s windowController <code>windowDidBecomeKeyNotification</code> fires, checks the boolean value and if it is YES calls <code>runModalForWindow:self.window</code>.</p> <p>now <strong>windowB</strong> is modal and key. <strong>windowA</strong> is still open, but not key.</p> <p><strong>windowB</strong> has Okay and Cancel buttons which call: <code>[NSApp stopModalWithCode:returnCode]</code> and then <code>orderOut:</code> and <code>close</code> on <strong>windowB</strong>.</p> <p>if the popUpWindowDatePicker is used, and <em>then</em> any time after that <strong>windowB</strong> is closed with Okay or Cancel, an Assertion Failure is called involving the Okay or Cancel buttons:</p> <pre><code>*** Assertion failure in -[NSButton lockFocus], /SourceCache/AppKit/AppKit-1038.29/AppKit.subproj/NSView.m:5237 -[NSButton(0x20021cd60) lockFocus] failed with window=0x20021c0c0, windowNumber=-1, [self isHiddenOrHasHiddenAncestor]=0 </code></pre> <p>if <strong>windowB</strong> is closed with Okay or Cancel and popUpWindowDatePicker has not been used, there is no assertion failure.</p> <p>it seems that the sequence <code>runModal-stopModal-runModal-stopModal</code> on <strong>windowB</strong> is involved in the failure of lockFocus on the button pressed, but i can't find a way to trace down more than this to solve this problem.</p> <p>can anyone offer any hints or thoughts?</p>
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      1. POHow to handle assertion failure on NSButton lockFocus when using modalWindow on quit?
      1. USfaviomob
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    1. CO“The button's method …” Which one? Buttons have a lot of methods, `lockFocus` being just one of them. “… the button does not have `lockFocus` set …” That makes no sense, because `lockFocus` is a verb, not a property. Have you tried breaking on the exception using the debugger?
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      1. USPeter Hosey
    2. COi've edited my question to reflect that i'm referring to the action method when button is pressed and that lockFocus isn't available on quit. i'll try to break on the exception, and report back. thanks.
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      1. USlulu
    3. COi've re-written my question to try for more clarity.
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      1. USlulu
 

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