So I have a window that now works fine as a modal window, but because I don’t
like where it appears on the screen, I’m attempting to run it as a sheet
instead. My Cocoa books and the NSWindow documentation seem to suggest that any
window can be run as a sheet, and they along with XCode’s code-completion
suggestions guided me to create this code:
-(IBAction)exportToOpenXml:(id)sender
{
if ( self.openXmlExportSettings == nil ) {
self.openXmlExportSettings = [[OpenXmlExportSettings alloc] init];
}
OpenXmlExportSettings* settings = self.openXmlExportSettings;
NSWindow* window = [self documentWindow];
[NSApp beginSheetModalForWindow:window
completionHandler:^(NSModalResponse returnCode) {
// Get this sheet offscreen to prepare for upcoming savePanel
sheet
[NSApp orderOut:settings];
if ( returnCode == NSModalResponseOK ) {
// Rather than reading out the individual settings here,
// I’ll just pass along the whole dialog to the next stage,
// which is in another function in order to avoid
// such extreme indentation
[self exportToOpenXmlWithSettings:settings];
}
}];
}
Now, I’m not sure the returnCode will be what I expect—I’ll follow through with
the debugger if I can ever get the sheet to display—but that’s not the problem.
The problem is that the attempt to display the sheet causes a crash:
2015-02-09 21:39:40.378 MyApp[5572:1677308] An uncaught exception was raised
2015-02-09 21:39:40.378 MyApp[5572:1677308] -[NSApplication
beginSheetModalForWindow:completionHandler:]: unrecognized selector sent to
instance 0x6000001001b0
Looks to me like beginSheetModalForWindow:completionHandler: is the modern API,
so why would it be unrecognized? Is there a better way I should be doing this?
—
Charles
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