How to give multiplier to the width and height of the UIImageView .
I need to add the constraint to the image with have a height of 200*400-1x,400*1600-2x .I have set the constraints in the 12.9 iPad .
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Please check this link . https://stackoverflow.com/questions/35455194/calculating-aspect-ratio-for-all-sizes-of-iphone/35455631#35455631 – Rahul Patel Jan 22 '18 at 07:33
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pls go through : https://developer.apple.com/library/content/documentation/UserExperience/Conceptual/AutolayoutPG/AnatomyofaConstraint.html – MAhipal Singh Jan 22 '18 at 07:39
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Where does `x` come from? – FreeNickname Jan 22 '18 at 08:01
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Do it programmatically. Create an IBoutlet for your constraints. Update your constraint accordingly. yourConstraint.constant = 200*400-1x
Mark Bell
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This constraint give the image view 0.7 of the width of the view
[self.view addConstraint:[NSLayoutConstraint constraintWithItem:self.imageView
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:self.view
attribute: NSLayoutAttributeWidth
multiplier:0.7
constant:0]];
