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我試圖讓UIView courseView自動佈局。我希望UIView的比例保持不變,直到最外邊緣距離超視圖邊緣15點。 由於某些原因courseView填充整個超視圖(減去15分),並沒有調整大小以適應。所以有些不顯示並被切斷。Autolayout調整UIView不工作
self.view.addSubview(courseView!)
let aspectConstraint = NSLayoutConstraint(item: courseView,
attribute: .Height,
relatedBy: .Equal,
toItem: courseView,
attribute: .Width,
multiplier: courseView.frame.size.height/courseView.frame.size.width,
constant: 0.0)
aspectConstraint.active = true
let topConstraint = courseView.topAnchor.constraintGreaterThanOrEqualToAnchor(topLayoutGuide.bottomAnchor, constant: 15)
topConstraint.active = true
let leadingConstraint = courseView.leadingAnchor.constraintLessThanOrEqualToAnchor(view.leadingAnchor, constant: 15)
leadingConstraint.active = true
let trailingConstraint = courseView.trailingAnchor.constraintGreaterThanOrEqualToAnchor(view.trailingAnchor, constant: -15)
trailingConstraint.active = true
let bottomConstraint = courseView.bottomAnchor.constraintLessThanOrEqualToAnchor(view.bottomAnchor, constant: -15)
bottomConstraint.active = true
任何想法?謝謝!