keefo / createmultiplewindow Goto Github PK

as per http://stackoverflow.com/questions/15053211/nswindowcontroller-showwindownil-does-nothing

instead of

• (IBAction)newWindow3:(id)sender;
  {
  NSWindow *window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 300, 140)
  styleMask:NSTitledWindowMask | NSClosableWindowMask
  backing:NSBackingStoreBuffered
  defer:YES];
  [window center];
  [window setTitle:@"Window 3"];
  NSWindowController *wc = [[NSWindowController alloc] initWithWindow:window];
  [wc showWindow:nil];
  [wc.window center]; // <- this is being retained so window presents correctly
  [window release];
  }

With ARC - you'lll need to declare a local variable or add it to an mutable array to retain it.
@interface AppDelegate : NSObject
{
NSWindowController *wc;
}

• (IBAction)newWindow3:(id)sender;
  {
  NSWindow *window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 300, 140)
  styleMask:NSTitledWindowMask | NSClosableWindowMask
  backing:NSBackingStoreBuffered
  defer:YES];
  [window center];
  [window setTitle:@"Window 3"];
  wc = [[NSWindowController alloc] initWithWindow:window];
  [wc showWindow:nil];
  [wc.window center];

}