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  • swift

    1. /// 创建单个热门项目itemView
        private func creatProcduceItemView(producrName: String , producePrice: String) -> UIView {
            let item = UIView()
            item.translatesAutoresizingMaskIntoConstraints = false
            let produceLab = JYBaseViewModel.creatLabe(text: producrName, font: UIFont.systemFont(ofSize: 16), textColor: UIColor.init(hexColor: "9B9B9B"))
            let priceLab = JYBaseViewModel.creatLabe(text: "¥ " + producePrice.decimalPointCount(), font: UIFont.systemFont(ofSize: 16), textColor: UIColor.init(hexColor: "9B9B9B"))
            item.addSubview(produceLab)
            item.addSubview(priceLab)
            let vd: [String: UIView] = ["produceLab": produceLab ,
                                        "priceLab": priceLab]
            item.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "|[produceLab]", options: [], metrics: nil, views: vd))
            item.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "[priceLab]|", options: [], metrics: nil, views: vd))
            item.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[priceLab]|", options: [], metrics: nil, views: vd))
            item.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[produceLab]|", options: [], metrics: nil, views: vd))
            return item
        }
    

      

      2.  /// 根据数组创建数量
        func setitemsBgViewSubViews(itemsArr : [String]){
            
            //添加之前移除所有 添加的控件
            itemsBgView.subviews.forEach({$0.removeFromSuperview()})
            
            /// 布局热门项目的view
            for (i, _) in itemsArr.enumerated(){
                
                let itemView = self.creatProcduceItemView(producrName: itemsArr[i], producePrice: "38.0")
                itemsBgView.addSubview(itemView)
                
                let vd: [String: UIView] = ["itemView": itemView]
                let metrics: [String: Any] = ["top": CGFloat(i) * 30]
                itemsBgView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "|[itemView]|", options: [], metrics: nil, views: vd))
                itemsBgView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-top-[itemView(30)]", options: [], metrics: metrics, views: vd))
                if i == itemsArr.count - 1 {
                    itemView.bottomAnchor.constraint(equalTo: itemsBgView.bottomAnchor).isActive = true
                }
            }
        }
    3. 父控件设置约束
    self.fastAddConstraints("|-24-[itemsBgView]-24-|", vd)
    
    注意:如果这里父控件是在scrollview 上, 这里宽度要自己设置为屏幕宽度
    self.fastAddConstraints("|-24-[itemsBgView(屏幕宽度)]-24-|", vd)
    

      

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  • 原文地址:https://www.cnblogs.com/qingzZ/p/9909999.html
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