9.2、UICollectionView使用Xib定义Cell、网络请求（Alamofire）、解析数据（ObjectMapper）、刷新（MJRefresh）

1、视图

import UIKit
import Alamofire
import ObjectMapper
import MJRefresh
class NewCollectionView: UIView,UICollectionViewDelegateFlowLayout,UICollectionViewDataSource {
    var dataArrays = NSMutableArray()
    var newCollecView:UICollectionView?
    var pageNo:Int = 1

    func createCollectionView() {
        let flayout = UICollectionViewFlowLayout()
        //设置item尺寸
        flayout.itemSize = CGSize(width: (ScreenWidth-18)/2, height: 200)
        //设置左右间隔
//        flayout.minimumInteritemSpacing = 6
//        //设置上下间隔
//        flayout.minimumLineSpacing = 6
//        flayout.sectionInset = UIEdgeInsetsMake(6, 6, 6, 6)
        //设置滚动方向
        flayout.scrollDirection = .vertical
        //初始化
        let collecView = UICollectionView(frame: CGRect(x: 0, y: 0, width: ScreenWidth, height: self.frame.size.height), collectionViewLayout: flayout)
        self.addSubview(collecView)
        collecView.delegate = self
        collecView.dataSource = self
        collecView.backgroundColor = #colorLiteral(red: 0.3098039329, green: 0.2039215714, blue: 0.03921568766, alpha: 1)
//        collecView.register(NewCell.self, forCellWithReuseIdentifier: "OtherCell")
        collecView.register(UINib.init(nibName: "OtherCell", bundle: nil), forCellWithReuseIdentifier: "OtherCell")
        collecView.alwaysBounceVertical = true;
        self.newCollecView = collecView
        
        let header:MJRefreshGifHeader = MJRefreshGifHeader(refreshingTarget: self, refreshingAction: #selector(updateLoadData))
                //设置mj_header
        self.newCollecView?.mj_header = header
        //定义动画刷新footer
        let footer:MJRefreshAutoStateFooter = MJRefreshAutoGifFooter(refreshingTarget: self, refreshingAction: #selector(footRefreshAction))
        //        let footer:MJRefreshAutoFooter = MJRefreshAutoFooter(refreshingTarget: self, refreshingAction: #selector(footRefreshAction))
        //设置mj_header
        self.newCollecView?.mj_footer = footer

    }
    func updateLoadData() {
        print("刷新")
        self.newCollecView?.mj_header.endRefreshing()
        self.pageNo = 1
        self.requestHomeData()
    }
    func footRefreshAction() {
        self.pageNo += 1
        self.requestHomeData()
    }
    //数据解析
    func requestHomeData(){
        let urls = "http://zhibo.4g.jxnews.com.cn/v3/Activity/getADVList?uid=27872683&username=b0NmTnp2eVowdUItZm53WC1OSkNGMHduZ3Brbw==&uuid=3CD5D574-A990-443A-BB08-8171BF5341AB&city=5LiK5rW35biC&plateform=1&version=2.2.1&platform=1&isnight=0&page=\(self.pageNo)&pageSize=20"
        Alamofire.request(urls, method: .get, parameters: nil, encoding: JSONEncoding.default).responseJSON { (response) in
                        print(response)
            self.newCollecView?.mj_header.endRefreshing()
            self.newCollecView?.mj_footer.endRefreshing()
            switch response.result.isSuccess{
            case true:
                let dicData = response.result.value as! NSDictionary
                let array = dicData["data"] as! NSArray
                let nsArray:NSMutableArray=NSMutableArray()
                for model in array{
                    let statues:MainHomeModel = Mapper().map(JSON: model as! [String : Any])!
                    nsArray.add(statues)
                }
                if self.pageNo>1 {
                    self.dataArrays.addObjects(from: nsArray as! [Any])
                }else{
                    self.dataArrays.removeAllObjects()
                    self.dataArrays.addObjects(from: nsArray as! [Any])
                }
                self.newCollecView?.reloadData()
            case false:
                print("首页数据错误\(String(describing: response.result.error))")
            }
        }
    }
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.dataArrays.count
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
//        Xib的cell
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "OtherCell", for: indexPath) as! OtherCell
        if self.dataArrays.count>0 {
            let model:MainHomeModel = self.dataArrays[indexPath.row] as! MainHomeModel
            cell.titleLabels.text = model.title
            cell.bigImage.sd_setImage(with: URL(string: model.showImage!), placeholderImage: UIImage.init(named: "02"))
        }
//        代码编写Cell
//        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "OtherCell", for: indexPath) as! NewCell
//        let model:MainHomeModel = self.dataArrays[indexPath.row] as! MainHomeModel
//        cell.titleLabels.text = model.title
//        cell.bottImageView.sd_setImage(with: URL(string: model.showImage!))
        return cell
    }
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        print(indexPath.item)
    }
}

2、model数据源

//
//  MainHomeModel.swift
//  UICollectionView
//
//  Created by modai on 2017/7/28.
//  Copyright © 2017年 huanqiu. All rights reserved.
//

import UIKit
import ObjectMapper
class MainHomeModel: Mappable {
    var id:String?
    var platform:String?
    var joinNum:String?
    var showImage:String?
    var title:String?
    init() {
        
    }
    required init?(map:Map) {
        mapping(map: map)
    }
    func mapping(map: Map) {
        platform    <- map["platform"]
        id    <- map["id"]
        joinNum    <- map["joinNum"]
        showImage    <- map["showImage"]
        title    <- map["title"]
        
    }
}

3、xib自定义Cell

import UIKit

class OtherCell: UICollectionViewCell {

    @IBOutlet weak var titleLabels: UILabel!
    @IBOutlet weak var bigImage: UIImageView!
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }
}