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
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
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