On Thu, Dec 30, 2010 at 6:50 PM, aglee <ag...@mac.com> wrote: > On Dec 30, 2010, at 06:13 PM, colo <colo0l...@gmail.com> wrote: > > I can get it to compile just fine now but I can't get the button to > show up at all. > Perhaps I am sending the addSubview to the incorrect place? NSView > *superview = [window contentView]; > I thought contentView was the top. > > > > @implementation WVShapesView > -(BOOL) isFlipped { return YES;} > > - (id)initWithFrame:(NSRect)frame { > self = [super initWithFrame:frame]; > if (self) { > // Initialization code here. > > > NSView *superview = [window contentView]; > NSRect frame = NSMakeRect(10, 10, 200, 100); > > NSButton *button = [[NSButton alloc] initWithFrame:frame]; > [button setTitle:@"arrrrggg"]; > > > [superview addSubview:button]; > [button release]; > > > } > return self; > > > > } > > > The immediate answer to your question is that your init method is the wrong > place to do this. The view is in the process of being created, so it > doesn't belong to any window yet. Try doing this in awakeFromNib. See the > documentation for awakeFromNib for more info. > Related points that will make your life easier: > (1) Use the debugger and/or NSLog statements. This is the kind of thing > where you should use the debugger to confirm the code is going through the > steps you think it is. In this case I would have stepped through > initWithFrame: to confirm the button is being created and does become a > subview of the window's content view. I'm pretty sure if you do this you > will find the window is nil. You could also have discovered this by adding > NSLog statements. Messages sent to nil don't do anything, so the button you > created never gets added as a subview of anything. > (2) Use nibs. Setting up view hierarchies is exactly the kind of thing nib > files (also known as xib files) are for. You can create your WVShapesView > and your button within your window, and you can easily do some of the things > you left out in your code. For example, it just takes a couple of clicks to > specify how your button should reposition itself when the window resizes. > Also in the code above you never set an action for the button to perform > when it is clicked; you would typically do this with a simple drag in > Interface Builder. The overwhelming majority of Cocoa UIs are constructed > with Interface Builder, especially where it's just a couple of subviews > within a window. > (3) Separation of concerns. The design of WVShapesView is flawed if it's > adding a button to its own window; it's not even adding the button to > itself. Suppose you create a window containing two WVShapesViews? They > will both put a button in the window. The existence of the button is no > concern of the WVShapeView, and the view shouldn't muck with the view > hierarchy outside of itself. Better to create your layout in a nib file and > create a view controller and/or window controller that loads the nib. See > NSViewController and NSWindowController. > Hope this helps, > --Andy >
Hey Andy I totally appreciate every last word you wrote there. I was trying it all from a hacking approach in just trying to get something working. But you were totally correct on the awakefromnib being part of the issue. I will slow down now and try to build things correctly from all of that advice. Thank you very much. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com