Re: View not visible
Re: View not visible
- Subject: Re: View not visible
- From: spsaxena <email@hidden>
- Date: Thu, 29 Jul 2010 13:06:53 +0530
Thanks Kyle for so quick reply. Please read my answers inline.
On Thu, Jul 29, 2010 at 12:36 PM, Kyle Sluder <email@hidden> wrote:
> On Thu, Jul 29, 2010 at 12:01 AM, spsaxena <email@hidden>
> wrote:
> > Sorry for the newb question. I am just trying to create a view
> > programatically, then add it to window and color it. But when I run it I
> do
> > not see the colored view.
>
> First thing's first, do you have a reason you're not using Interface
> Builder for this?
> sp-- I actually want to learn how to do this programatically without using
> IB
>
> > Can you please point as to what I am doing wrong. Following is my code -
> >
> > NSView * windowView = [[self window] contentView];
> > NSRect windowViewBounds = [windowView bounds];
> > NSView * subView = [[NSView alloc]
> > initWithFrame:NSInsetRect(windowViewBounds, 20, 20)];
> > [windowView addSubview:subView];
>
> So far, so good. Except that you're going to wind up leaking subView
> because you +alloc it, then hand it off to the content view and never
> release it. The static analyzer should have warned you about this.
>
> sp -- As it's a trial code so I had not released it. But I will take care
of such thing.
> > NSView * drawView = subView; // subView
>
> This is unnecessary. You might as well just keep using the subView
> variable.
>
sp -- Actually when it did not work at first place. I tried to change it to
NSView * drawView = windowView; so I took a variable to easily switch
between the two views.
>
> > [drawView lockFocus];
> > [[NSColor grayColor] set];
> > NSRectFill([drawView bounds]);
> > [drawView unlockFocus];
>
> This is not how views are drawn in Cocoa. Please read the Cocoa
> Drawing Guide:
> http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/CocoaDrawingGuide/Introduction/Introduction.html
>
> sp -- As the above worked for the main windowView so I thought it might
also work for any subView. But I will go by your suggesstion to read the
guide first.
> --Kyle Sluder
>
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