Stopping modal when window is closed (Cocoa)
I am currently displaying a modal window by using this code:
[[NSApplication sharedApplication] runModalForWindow:mainWindow];
However, when I close this window, the other windows are still inactive. How d开发者_运维问答o I run the stopModal
method when the window is closed using the "red x"?
Thank you,
Michael
You can create a delegate for the window and have it respond to either the
-(void)windowWillClose:(NSNotification *)notification or the
- (void)windowShouldClose:(NSNotification *)notification methods like so:
- (void)windowWillClose:(NSNotification *)notification {
[[NSApplication sharedApplication] stopModal];
}
See Mac Dev Center: NSWindowDelegate Protocol Reference
If you have a dialog that applies to a specific window, then you probably shouldn't be using a modal dialog but a sheet. Modal dialogs should be avoided if possible. If you use a sheet then the problem that you're experiencing will no longer be an issue.
- (void)showSheet:(id)sender
{
[NSApp beginSheet:yourModalWindow
modalForWindow:windowThatSheetIsAttachedTo
modalDelegate:self
didEndSelector:@selector(sheetDidEnd:returnCode:contextInfo:)
contextInfo:nil];
}
- (void)sheetDidEnd:(NSWindow *)sheet returnCode:(NSInteger)returnCode contextInfo:(void *)contextInfo
{
[sheet orderOut:self];
[NSApp endSheet:sheet];
}
Along with Randall's answer you can link the controller class as the delegate for the window defined in your .xib file.
You can handle the
[[NSApplication sharedApplication] stopModal];
in either
-(void)performClose:(id)sender
-(void)windowWillClose:(NSNotification *)notification
methods.
Swift 4 (note that the previous methods are deprecated):
window.beginSheet(self.uiSettingsPanel, completionHandler: {response in
NSLog("Finished sheet, response: \(response)")
})
where self.uiSettingsPanel is the instance of the NSPanel subclass. Then, within the NSPanel sub-class for the sheet, close it with something like
@IBAction func buttonOK(_ sender: NSButton) {
self.sheetParent!.endSheet(self, returnCode: .OK)
}
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