I am trying to display a custom sheet in my application, but I think I am doing something wrong. While everything seems to be working just fine, I have a rather odd side-effect. (which took hours to figure out). It turns out that everytime I display a sheet in my application, the Application delegate gets set to the instance of the sheet, thus my Controller gets unset as the delegate causing all sorts of problems.
I've created a NIB file which I called FailureSheet.xib. I laid out my interface in IB, and then created a subclass of 'NSWindowController' called 'FailureSheet.m' which I set to the File's Owner. Here is my FailureSheet class:
#import "FailureSheet.h"
@implementation FailureSheet // extends NSWindowController
- (id)init
{
if (self = [super initWithWindowNibName:@"FailureSheet" owner:self])
{
}
return self;
}
- (void)dealloc
{
[super dealloc];
}
- (IBAction)closeSheetTryAgain:(id)sender
{
[NSApp endSheet:[self window] returnCode:1];
[[self window] orderOut:nil];
}
- (IBAction)closeSheetCancel:(id)sender
{
[NSApp endSheet:[self window] returnCode:0];
[[self window] orderOut:nil];
}
- (IBAction)closeSheetCancelAll:(id)sender
{
[NSApp endSheet:[self window] returnCode:-1];
[[self window] orderOut:nil];
}
@end
Nothing complex going on here. Now this is how I display the FailureSheet in my 'Controller' class:
sheet = [[FailureSheet alloc] init];
[NSApp beginSheet:[sheet window]
modalForWindow:window
modalDelegate:self
didEndSelector:@selector(failureSheetDidEnd:etc:etc:)
contextInfo:nil];
Now if I log what the [NSApp delegate] is before displaying my sheet, it is <Controller-0x012345> which is correct. Then, after running this code and my sheet is up, if I log it again it is <FailureSheet-0xABCDEF>.
Not sure what I'm doing wrong here - Any ideas?