iOS - MVC与MVP的差异 (一)

一·Model层

OC : Model层数据如果是层层嵌套我会用以下的方法来分割

代码语言：javascript复制

@interface levelTwoModel : NSObject
//二级数据
@property (nonatomic, strong) NSString *iconUrl; 
@property (nonatomic, strong) NSString *className; 
@property (nonatomic, assign) NSInteger id; 
@property (nonatomic, strong) NSString *name; 
@end

@interface levelOneModel : NSObject
//一级数据
@property (nonatomic, strong) NSArray <levelTwoModel *>*levelTwo;
@property (nonatomic, strong) NSString *iconUrl;
@property (nonatomic, strong) NSString *className; 
@property (nonatomic, assign) NSInteger id; 
@property (nonatomic, strong) NSString *name; 
@end

Swift :

代码语言：javascript复制

struct levelModel: Codable {
    var levelTwoModel : [levelTwo]
    var iconUrl:String
    var className:String
    var id:Ind
    var name:String
}

struct levelTwo{
    var iconUrl:String
    var className:String
    var id:Int
    var name:String
}

二·ViewController层

OC : 在Objective-C 我会在Interface 声明一个Model变量通过Setter的方法把Model层数据传输过去

拿我在以前写的一篇文章中作例子 iOS-NSArray与Model模型 该篇文章中Model层数据通过UITabelView的delegate & dataSource 方法

代码语言：javascript复制

-(UITableViewCell *)cellForRowAtIndexPath {
    ·····
    yourModel *model = _dataArr[indexPath.row];
    return cell
}

那么Model数据通过Delegate传输到UITableViewCell当中去调用Setter来刷新数据

Swift :

代码语言：javascript复制

class ViewController: UIViewController, UITabelViewDelegate, UITableViewDataSource, levelPresenterDelegate {
   private let tableView : UITabelView = {
      let table = UITableView()
      table.register(UITableViewCell.self, forCellReuseIdentifier:"cell") 
      return table
   } // UITabel的复用在私有方法中
   
   //Model层私有变量
   private var model = [levelModel]()
   //Presenter层
   private let presenter = modelPresenter()
   override func viewDidLoad() { 
       super.viewDidLoad()
       title = "Users"
       view.addSubview(tableView)
        //tabel
       tableView.delegate = self
       tableView.dataSource = self
        //presenter
       presenter.setViewDelegate(delegate: self)
       presenter.getUsers()
    }
    //UITabelViewDataSource & Delegate
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return users.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        var content = cell.defaultContentConfiguration()
        content.text = users[indexPath.row].name
        cell.contentConfiguration = content
        return cell
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
        //告诉生产者去刷新这次点击cell的操作
    }
    
        //persenter delegate
    func presentLevelOneModel(model: [levelModel]) {
        self.model = model
        DispatchQueue.main.async {
            self.tableView.reloadData() //异步刷新
        }
    }
    
    func presentAlert(title: String, message: String) {
        
    }
}

三·Controller层 & Presenter层

OC :

代码语言：javascript复制

- (void)setModel:(Model *)model{
    _model = model;
}

Swift : 在Swift的MVP架构模式中P->Presenter是通过Protocol协议来传输数据

代码语言：javascript复制

protocol levelPresenterDelegate : AnyObject {
    func presentLevelOneModel(model : [levelModel])
    func presentAlert(title: String, message: String)
}

我们可以通过类型声明的方法
typealias PresenterDelegate = levelPresenterDelegate & UIViewController

class modelPresenter{
    weak var delegate: PresenterDelegate? //遵循我们声明的levelPresenterDelegate 和 UIViewController协议
    public func getModel() {
        guard let url = URL(string: "https://cloud.tencent.com/developer/user/5302716") else { return }
        _ = URLSession.shared.dataTask(with: url) { [weak self]data, _, error in
            guard let data = data, error == nil else {
                return
            }
            do {
                let model = try JSONDecoder().decode([levelModel].self, from: data)
                self?.delegate?.presentLevelOneModel(model: model)
            }
            catch {
                print(error)
            }
        }
    }
    public func setViewDelegate(delegate: PresenterDelegate) {
        self.delegate = delegate
    }
    
    }
}

架构设计 ios swift objective-c

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