Facebook sharing issue with Link and a screenshot

recently lanched app and when I click share fb buttun

first issue is what is black color from left and right side. The link is from itunes.

facebookSheet.addURL(NSURL(string: "https://itunes.apple.com/us/app/idxxxxxx"))

seconf issue is How to have link from itunes and add imege both??

acebookSheet.addImage(UIImage(named: "logo.png"))

If I put togher it will only display link.