Hey Luc, how are you?
I had to implement this exact functionality in a commercial project and here is
what I've found:
- The delegate methods will be called when the animation occurs---continuously.
So, if you are limiting the size of one of the subviews via
"splitView:min/max...", this is going to cause you problems. My solution to
this was to nil the delegate in the NSSplitView subclass before starting the
animations and, when the animations finish, get it back to the original value.
Just remember: if you start animating both view's frames, the
"animationDidFinish" delegate methods will be called twice, once for each
subview on both sides of the divider;
- The springs and struts mechanism goes bananas when the views' sizes become
zero. That's probably why your subviews are getting broken when you uncollapse:
when you did collapse, any subviews from the collapsing view that has the
resize-with-superview spring/struts will become zero sized, and when the
uncollapse happens the mechanism will not function properly. One way to solve
this is to make sure that you turn off all the spring/struts properties of your
collapsing view's subviews before doing the animation and getting it back to
normal after uncollapsing. This way, their sizes will not get zeroed;
- If the uncollapsing view is not getting back to the original size, it's most
probably the first problem I explained earlier: delegate.
I hope this helps. Best regards,
Alvaro Costa Neto
Em 05/02/2012, às 18:59, Luc Van Bogaert escreveu:
> I've been trying to implement a splitview with animated collapse/uncollapse
> of one of its subviews. So far without success, although I think I'm very
> close to a working solution. There's a lot of documentation and sample code
> on the internet, but none of what I have found seems to fit my needs.
>
> Currently, this is the code that does the animation (in a NSSplitView
> subclass) :
>
> - (void)animateDividerToPosition:(CGFloat)dividerPosition
> {
> NSView *view0 = [[self subviews] objectAtIndex:0];
> NSView *view1 = [[self subviews] objectAtIndex:1];
> NSRect view0Rect = [view0 frame];
> NSRect view1Rect = [view1 frame];
> NSRect overalRect = [self frame];
> CGFloat dividerThickness = [self dividerThickness];
>
> if ([self isVertical]) {
> view0Rect.size.width = dividerPosition;
> view1Rect.origin.x = dividerPosition + dividerThickness;
> view1Rect.size.width = overalRect.size.width - view0Rect.size.width -
> dividerThickness;
> } else {
> view0Rect.size.height = dividerPosition;
> view1Rect.origin.y = dividerPosition + dividerThickness;
> view1Rect.size.height = overalRect.size.height - view0Rect.size.height
> - dividerThickness;
> }
>
> [NSAnimationContext beginGrouping];
> [[NSAnimationContext currentContext] setDuration:0.3];
> [[view0 animator] setFrame: view0Rect];
> [[view1 animator] setFrame: view1Rect];
> [NSAnimationContext endGrouping];
> }
>
> Collapse seems to work fine this way, but when I uncollapse a subview, the
> views contents are only drawn partially, similar to the effect one sees when
> the splitview delegate does not implement the methods to constrain the
> subview size.
>
> Any ideas?
> Thanks
>
> --
> Luc Van Bogaert
>
>
>
>
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