UISrollView,使用约束，不使用Frame,

这不能够使用contentView,必须手动添加容器视图。

import UIKit

class CBRecommendADCell: UITableViewCell {
    
    
    @IBOutlet weak var scrollView: UIScrollView!

    @IBOutlet weak var pageCtrl: UIPageControl!
    
    
    //数据
    var bannerArray: Array<CBRecommendBannerModel>? {
        
        didSet {
            //显示UI
            showData()
        }
        
    }
    
    
    func showData(){
        
        let cnt = bannerArray?.count
        if cnt > 0 {
            
            //0.添加一个容器视图
            let containerView = UIView.createView()
            scrollView.addSubview(containerView)
            //设置约束
            containerView.snp_makeConstraints(closure: {
                [weak self]
                (make) in
                make.edges.equalTo(self!.scrollView)
                make.height.equalTo(self!.scrollView)
            })
            
            
            
            var lastView: UIView? = nil
            for i in 0..<cnt! {
                
                //1.获取模型对象
                let model = bannerArray![i]
                
                //2.创建图片
                let tmpImageView = UIImageView.createImageView(nil)
                //在线加载图片
                /*
                 第一个参数:图片网址的url
                 第二个参数:默认图片
                 第三个参数:选项
                 第四个参数:可以获取下载的进度
                 第五个参数:下载结束的时候的操作
                 */
                
                let url = NSURL(string: model.banner_picture!)
                let image = UIImage(named: "sdefaultImage")
                tmpImageView.kf_setImageWithURL(url, placeholderImage: image, optionsInfo: nil, progressBlock: nil, completionHandler: nil)
                containerView.addSubview(tmpImageView)
                
                //约束
                tmpImageView.snp_makeConstraints(closure: { (make) in
                    make.top.bottom.equalTo(containerView)
                    make.width.equalTo(kScreenWidth)
                    if i == 0 {
                        make.left.equalTo(containerView)
                    }else{
                        make.left.equalTo((lastView?.snp_right)!)
                    }
                })
                
                lastView = tmpImageView
                
            }
            
            //修改容器视图的约束
            containerView.snp_makeConstraints(closure: { (make) in
                make.right.equalTo((lastView?.snp_right)!)
            })
            
            
            //修改分页控件
            pageCtrl.numberOfPages = cnt!
            
            //设置代理
            scrollView.delegate = self
            scrollView.pagingEnabled = true
            
        }
       
        
    }