gistfile1.txt

- (void)reloadAnimated:(BOOL)animated withCompletionBlock:(void(^)())completionBlock
{
    FWTPieChartLayer *pieLayer = self.containerLayer.sublayers.firstObject;
    
    [CATransaction begin];
    [CATransaction setCompletionBlock:completionBlock];
    [CATransaction setDisableActions:YES];
    
    CABasicAnimation *animation = (CABasicAnimation *)[pieLayer actionForKey:@"animationCompletionPercent"];
    animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    animation.duration = self.animationDuration;
    animation.fromValue = animated ? @0.f : @1.f;
    animation.toValue = @1.f;
    animation.byValue = @0.1f;
    
    [pieLayer setAnimationCompletionPercent:((NSNumber*)animation.toValue).floatValue];
    [pieLayer addAnimation:animation forKey:@"animationCompletionPercent"];
    
    [CATransaction commit];
}