MVVM模式仿写斗鱼APP首页

MVVM是一种什么样的模式在这篇文章中就不解释了，写这篇文章的目的我个人对MVVM模式的一点理解，下面直入正题：

项目结构

项目结构
其中对ViewModel模块包括代理方法的ViewModel和业务逻辑的ViewModel，着重介绍一下我封装的Yo_BaseCollectionViewModel

ViewModel

Yo_BaseCollectionViewModel类中是CollectionView的代理方法，以往这些代理方法都写在Controller中，个人感觉这样的Controller并不够清爽，Controller仅需要负责各模块之间的调度即可。我通过

public func set(DataSource data:() -> [Yo_AnchorBaseGroup], completion: () -> ()) {
dataSoureArr.append(contentsOf: data())
completion()
}```
闭包向该ViewModel传值，调用`completion()`闭包对传值后进行下一步处理，如刷新。
*Yo_RecommendViewModel*类中是网络请求和一写业务的处理

public func loadRecommendData(_ finishCallBack: @escaping (_: [Yo_AnchorBaseGroup], [Yo_AnchorBaseGroup]) -> ()) {

    let dGroup = DispatchGroup()
    
    dGroup.enter()
    let paramerers = ["limit" : "4", "offset" : "0", "time" : Date.getCurrentTime()]
    LSYNetWorkTool.httpRequest(method: .get, url: GenerateUrl + "getbigDataRoom", parmaters: paramerers, resultClass: Yo_BaseResultModel.self) { (success, failure) in
        if let success = success {
            if !success.error {
                self.bigDataRoomGroup.tag_name = "热门"
                self.bigDataRoomGroup.icon_name = "home_header_hot"
                let anchors = Mapper<Yo_AnchorModel>().mapArray(JSONArray: success.data!)
                self.bigDataRoomGroup.room_list = anchors!
            }
        }
        dGroup.leave()
    }
    
    dGroup.enter()
    LSYNetWorkTool.httpRequest(method: .get, url: GenerateUrl + "getVerticalRoom", parmaters: paramerers, resultClass: Yo_BaseResultModel.self) { (success, failure) in
        if let success = success {
            if !success.error {
                self.verticalRoomGroup.tag_name = "颜值"
                self.verticalRoomGroup.icon_name = "home_header_phone"
                let anchors = Mapper<Yo_AnchorModel>().mapArray(JSONArray: success.data!)
                self.verticalRoomGroup.room_list = anchors!
            }
        }
        dGroup.leave()
    }
    
    dGroup.enter()
    LSYNetWorkTool.httpRequest(method: .get, url: GenerateUrl + "getHotCate", parmaters: paramerers, resultClass: Yo_BaseResultModel.self) { (success, failure) in
        if let success = success {
            self.gameGroups = Mapper<Yo_AnchorBaseGroup>().mapArray(JSONArray: success.data!)!
        }
        dGroup.leave()
    }
    
    dGroup.notify(queue: DispatchQueue.main){
        
        self.dataArray.insert(self.bigDataRoomGroup, at: 0)
        self.dataArray.append(self.verticalRoomGroup)
        self.dataArray.append(contentsOf: self.gameGroups)
        
        self.gameArray.append(contentsOf: self.dataArray)
        self.gameArray.remove(at: 0)
        self.gameArray.remove(at: 0)
        let moreGroup = Yo_AnchorBaseGroup()
        moreGroup.tag_name = "更多"
        self.gameArray.append(moreGroup)
        finishCallBack(self.dataArray, self.gameArray)
        NotificationCenter.postNotifition(name: baseContentViewName)
    }
}

public func loadCycleData(_ finishCallBack: @escaping (_: [Yo_HomeCycleModel]?) -> ()) {

    LSYNetWorkTool.httpRequest(method: .get, url: "http://www.douyutv.com/api/v1/slide/6", parmaters: ["version" : "2.471"], resultClass: Yo_BaseResultModel.self) { (success, failure) in
        if let success = success {
            let cycleModelArray = Mapper<Yo_HomeCycleModel>().mapArray(JSONArray: success.data!)
            finishCallBack(cycleModelArray)
        }
    }
}

###View
为追求极致的Controller，将Controller的View 也提取了出来，凡是需要在Controller上创建的控件都写在该类中：

class Yo_RecommendContentView: Yo_BaseContentView {

override func configureView() {
    super.configureView()
}

lazy var collectionView: UICollectionView = {[weak self] in
    
    let layout = UICollectionViewFlowLayout()
    layout.minimumLineSpacing = 0
    layout.minimumInteritemSpacing = 10
    layout.sectionInset = UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 10)
    layout.headerReferenceSize = CGSize(width: kScreenW, height: 50)
    
    let collectionView = UICollectionView(frame: CGRect.zero, collectionViewLayout: layout)
    collectionView.backgroundColor = UIColor.white
    collectionView.contentInset = UIEdgeInsets(top:kCycleViewH + kGameViewH, left: 0, bottom: 0, right: 0)
    return collectionView
    }()

lazy var cycleView: Yo_HomeCycleView = {[weak self] in
    let cycleView = Yo_HomeCycleView(frame: CGRect.zero)
    cycleView.register(FSPagerViewCell.self, forCellWithReuseIdentifier: cycleViewCellID)
    cycleView.itemSize = .zero
    cycleView.automaticSlidingInterval = 3.0
    self?.collectionView.addSubview(cycleView)
    return cycleView
}()

lazy var gameView: UICollectionView = {[weak self] in
    
    let layout = UICollectionViewFlowLayout()
    layout.minimumLineSpacing = 0
    layout.minimumInteritemSpacing = 10
    layout.itemSize = CGSize(width: 80, height: kGameViewH)
    layout.scrollDirection = .horizontal
    
    let gameView = UICollectionView(frame: CGRect.zero, collectionViewLayout: layout)
    gameView.backgroundColor = UIColor.white
    gameView.showsHorizontalScrollIndicator = false
    gameView.showsVerticalScrollIndicator = false
    self?.collectionView.addSubview(gameView)
    return gameView
    }()

}

###Controller
controller中负责*View*和*ViewModel*之间的调度

class Yo_RecommendViewController: GenericViewController<Yo_RecommendContentView> {

override func viewDidLoad() {
    super.viewDidLoad()
    
    contentView.setupUI()
    
    collectionViewModel.registerCell { () -> [String : UICollectionViewCell.Type] in
        return [normalCellID: Yo_RecommendNormalCell.self, prettyCellID: Yo_RecommendPrettyCell.self]
    }
    
    collectionViewModel.registerReusableView(Kind: UICollectionElementKindSectionHeader) { () -> [String : UIView.Type] in
        return [sectionHeaderID: Yo_HomeSectionHeaderView.self]
    }
    
    gameViewModel.registerCell { () -> [String : UICollectionViewCell.Type] in
        return [HomeGameViewCell: Yo_HomeGameViewCell.self]
    }
    
    loadData()
}

fileprivate lazy var recommendViewModel: Yo_RecommendViewModel = {
    return Yo_RecommendViewModel()
}()

fileprivate lazy var collectionViewModel: Yo_RecommendCollectionViewModel = {[weak self] in
    return Yo_RecommendCollectionViewModel(CollectionView: (self?.contentView.collectionView)!)
    }()

fileprivate lazy var cycleViewModel: Yo_HomeCycleViewModel = {[weak self] in
    let cycleViewModel = Yo_HomeCycleViewModel(CycleView: (self?.contentView.cycleView)!)
    return cycleViewModel
    }()

fileprivate lazy var gameViewModel: Yo_GameViewModel = {[weak self] in
    return Yo_GameViewModel(CollectionView: (self?.contentView.gameView)!)
    }()

}

其中

GenericViewController<Yo_RecommendContentView>

是泛型语法，很简单，意思就是该Controller的View是* Yo_RecommendContentView*
分享一个小框架（用于实现上面的这种模式）：Demo中 **ConfigureUI**文件夹（非我所创，学习自SwiftGG）
###运行效果

![运行效果](https://img.haomeiwen.com/i2286932/b8943c72ab5a474f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
个人觉得这种架构模式思路清晰，藕合性低，各模块分工明确，该项目仅仅是个人的一些小想法。附上Demo:
[]()https://github.com/LeeShiYoung/DouYu