I am trying to the the following code to work. It does what's expected the first time and opens up a window and makes it the front window, but when it is called subsequent times, orderFront:
doesn't work because window is nil. Why doesn't initWithWindowNibName:
set the window field of the NSWindowController
object that is returned from initWithNibName:
?
//
// CustomerCard.m
// POSWonder
//
// Created by kaydell on 2/26/12.
// Copyright 2012 Kaydell Leavitt. All rights reserved.
//
#import "CustomerCard.h"
@implementation CustomerCard
// declare customerCard as a static variable
static CustomerCard* customerCard;
+(void) show {
// if the customer card isn't instantiated, then instantiate it
if (customerCard == nil) {
customerCard = [[CustomerCard alloc] initWithWindowNibName:@"CustomerCard"];
if (!customerCard.window) {
NSLog(@"Why is window nil here?"); // <<<<<<<<<<< This line gets called <<<<<
}
}
// show the customer card and make it the front window
[customerCard showWindow:self];
[customerCard.window orderFront:self]; // <<<<<<<< This line doesn't seem to do anything
}
-(void) dealloc {
customerCard = nil;
[super dealloc];
}
@end
I know that this is an old question, but I wanted to answer my own question anyways.
I think that my using static variables and a singleton for the Customer Card is not a good idea.
// declare customerCard as a static variable
static CustomerCard* customerCard;
It seems to me now that whenever you use static variables, you are defeating the purpose of object-oriented programming. Maybe the user wants to have more than one customer card to view more than one customer in different windows.
That's what I think now.