@implementation SlowFlipView

// Combine something old…

- (void)flipSlowly;
{
    // enable perspective transforms
    LKTransform sublayerTransform = LKTransformIdentity;
    sublayerTransform.m34 = 1.0 / -420.0;
    [[[self superview] _layer] setSublayerTransform:sublayerTransform];

[[self _layer] setTransform:LKTransformMakeRotation(M_PI, 0, -1, 0)];
}

// with something new…

- (id)actionForLayer:(LKLayer *)layer forKey:(NSString *)key;
{
    if ([key isEqualToString:@”transform”]) {
        LKBasicAnimation *flipAnimation = [LKBasicAnimation animationWithKeyPath:key];
        [flipAnimation setTimingFunction:[LKTimingFunction functionWithName:@”easeInEaseOut”]];
        [flipAnimation setDuration:5.0]; // take yr time there, partner
        return flipAnimation;
    } else
        return [super actionForLayer:layer forKey:key];
}

@end

slerp

You are so cover flow