Text over image in Uiview - ios

sorry, if this might been asked before.
I am laying out a viewcontroller for a new app. It will include a photo (UIImageview) which fills the nearly all of the screen and it should include a scrollable UITextview which should fill the bottom right corner of the screen and including a description of the photo.
So i have two views over one space and i would like to give the Textview priority over the UIimage. Is there any other way then reducing "Alpha" of the UIImage to make the Textview visible ? Tinkered around with Conten Hugging Priority and Content Compression ... to no avail.
Any help would be appreciated
Thanks

The easiest way to make sure text is easily readable over any image, I suggest setting a background of color rgba(.2, .2, .2, .8) or something similar and then using a white font color.

Thanks everybody for trying to help me out... I have found the solution... It is perfectly ok to overlay Views in Interfacebuilder but then it is imperative to use a background color for the overlaying textview with reduced opacity.

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Set the background of the "Inventory Details Bar" to a solid color to check for potential FX leaking up to the overlying view.
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3 hours researching,
post for help...
Found the issue a moment later.
Ok, so the view that contains the image stack with blurring effects, including the label and the background images, has a shadow that I throw over the scrolling cells below it.
In looking for a solution to dealing with the layer shadow, someone had mentioned rasterizing the whole view to make it more efficient. Which means.... it turns the whole view and its contents into an image of sorts to lower processing resources.
It was...
(detailedImageView being the name of the parent UIView)
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