calloutView with AutoLayout

[haashem]

I want to thank you for developing this nice replicate of UICalloutView. I used these library 3 years ago for iGolestan app.

now I'm using again for another app. I have designed a custom content view and layout the subviews with auto layout. subviews are some UILabels which can shrink or grow based on their text length.
here is the final result I achieved:

but problem is here SMCalloutView initially needs contentView frame, but autolayouted contentView initially doesn't have any frame! until [self layoutIfNeeded] gets called! so I move'd =>

// layout now so we can immediately start animating to the final position if needed
    [self setNeedsLayout];
    [self layoutIfNeeded];

before

// size the callout to fit the width constraint as best as possible
    self.frameSize = [self sizeThatFits:CGSizeMake(constrainedRect.size.width, self.calloutHeight)];

as you see in the below gif, initially SMCalloutView doesn't correctly show callout, display bottom arrow at top. but after that callout appears correctly.

do you have any idea how can I fix that?