On Jun 19, 2011, at 11:59, Tales Pinheiro de Andrade wrote:
> if ([keyPath isEqualToString:@"contentOffset"]) {
> CGPoint newContentOffset = [(UIScrollView *)object contentOffset];
> newContentOffset.y = self.contentOffset.y;
> self.contentOffset = newContentOffset;
> }
It may be as simple as changing the above pattern to this pattern:
> if ([keyPath isEqualToString:@"contentOffset"]) {
> CGPoint newContentOffset = [(UIScrollView *)object contentOffset];
> newContentOffset.y = self.contentOffset.y;
> if (!CGPointEqualToPoint (self.contentOffset, newContentOffset))
> self.contentOffset = newContentOffset;
> }
But note:
1. You should really check the object (at least its class) as well as the
keyPath.
2. You should really use a context parameter that's unique for your
observations, and call super if the context isn't what you expect.
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