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can not run on iphone simulater #44

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yangshengchaoios opened this issue Sep 21, 2014 · 1 comment

yangshengchaoios commented Sep 21, 2014

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yangshengchaoios commented Sep 21, 2014

The program will crash at the following lines:
so, why?

    // @HACK: Come up with a better pattern for removing observers.
    @try {
        [tweenOperation removeObserver:[PRTween sharedInstance] forKeyPath:@"period.tweenedValue"];
    } @catch (id exception) {
    }
    @try {
        [tweenOperation removeObserver:[PRTween sharedInstance] forKeyPath:@"period.tweenedLerp"];
    } @catch (id exception) {
    }

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