如何通过多个视图赋予程序约束相等的宽度和高度。我检查了谷歌,但对于通过自动布局以编程方式相等的宽度和高度约束不是完美的答案。
我的代码如下:
var countNoOfViews:Int = 3
@IBOutlet var viewForRow1: UIView!
override func viewDidLoad() {
super.viewDidLoad()
self.specialButtonViewLeft()
}
func specialButtonViewLeft(){
for i in 0..<countNoOfViews{
var customView:UIView!
customView = UIView(frame: CGRect.zero)
customView.translatesAutoresizingMaskIntoConstraints = false
viewForRow1.addSubview(customView)
let widthConstraint = NSLayoutConstraint(item: customView, attribute: .width, relatedBy: .equal,toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 20.0)
let topConstraint = NSLayoutConstraint(item: customView, attribute: .top, relatedBy: .equal,toItem: self.viewForRow1, attribute: .top, multiplier: 1.0, constant: 0)
let bottomConstraint = NSLayoutConstraint(item: customView, attribute: .bottom, relatedBy: .equal,toItem: self.viewForRow1, attribute: .bottom, multiplier: 1.0, constant: 0)
let leadingConstraint = NSLayoutConstraint(item: customView, attribute: .leading, relatedBy: .equal, toItem: self.viewForRow1, attribute: .leading, multiplier: 1, constant: customLeadingSpaceLeft)
customLeadingSpaceLeft = customLeadingSpaceLeft + customViewWidth
arrayLeftBtnConstraints.append(widthConstraint)
if i == 0{
customView.backgroundColor = UIColor.red
}else if i == 1{
customView.backgroundColor = UIColor.green
}else if i == 2{
leftViewVal = customLeadingSpaceLeft
customView.backgroundColor = UIColor.black
}
customView.alpha = 0.50
viewForRow1.addConstraints([widthConstraint, leadingConstraint,topConstraint,bottomConstraint])
}
}
我想以编程方式添加等宽约束。
您有三种可能的方法:
尝试一下: