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June 14, 2022 09:01
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UIImageView with Aspect Fit and Alignment To Top. thanks to (http://stackoverflow.com/a/27569222/1267174)
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extension UIImageView { | |
func topAlignmentAndAspectFit(to view: UIView) { | |
self.contentMode = .scaleAspectFill | |
self.translatesAutoresizingMaskIntoConstraints = false | |
view.addSubview(self) | |
self.addConstraints( | |
[NSLayoutConstraint(item: self, | |
attribute: .height, | |
relatedBy: .equal, | |
toItem: self, | |
attribute: .width, | |
multiplier: self.frame.size.height / self.frame.size.width, | |
constant: 0.0)]) | |
view.addConstraints( | |
[NSLayoutConstraint(item: self, | |
attribute: .centerX, | |
relatedBy: .equal, | |
toItem: view, | |
attribute: .centerX, | |
multiplier: 1.0, | |
constant: 0.0)]) | |
view.addConstraints( | |
[NSLayoutConstraint(item: self, | |
attribute: .width, | |
relatedBy: .equal, | |
toItem: view, | |
attribute: .width, | |
multiplier: 1.0, | |
constant: 0.0)]) | |
view.addConstraints( | |
NSLayoutConstraint.constraints(withVisualFormat: "V:|[imageView]", | |
options: .alignAllTop, | |
metrics: nil, | |
views: ["imageView": self])) | |
} | |
} |
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how to align left in case?