Has anyone every come across a problem where simply calling
convertPoint:toLayer: (not even using the result at all) affects the behavior
of animations?
CGPoint start, end;
start, end = ....;
// Enable/disable this line and it will change the behavior!
[rootLayer convertPoint:start toLayer:layerA];
[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue
forKey:kCATransactionDisableActions];
layerA.position = start;
[CATransaction commit];
[CATransaction begin];
[CATransaction setAnimationDuration:2.0];
layerA.position = end;
[CATransaction commit];
What the above should do is immediately move layerA's position to start, and
then animate it from start to end. Except if the convertPoint:toLayer: line is
in there, it ignores the first transaction entirely and simply animates from
whatever layerA's current position is, to end.
Sample project:
http://www.sethwillits.com/temp/CAConvertPointBug.zip
--
Seth Willits
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