iOS架构从?MVC、MVP?到?MVVM

// Controller
- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    
    __weak typeof(self) wealSelf = self;
    MVCTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell_identifer"];
    if(cell == nil){
        cell = [[MVCTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell_identifer"];
    }
    DemoModel *model = self.dataArray[indexPath.row];
    [cell loadDataWithModel:model];
    cell.clickBtn = ^{
        NSLog(@"id===%ld",model.num);
        [wealSelf changeNumWithModel:model];
    };
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    return cell;
}
/*
* 用户点击事件通过Block传递过来后，在Controller层处理更新Mdoel以及更新视图的逻辑
*/
- (void)changeNumWithModel:(DemoModel*)model{
    
    model.num++;
    NSIndexPath *path = [NSIndexPath indexPathForRow:model.Id inSection:0];
    [self.mainTabelView reloadRowsAtIndexPaths:@[path] withRowAnimation:UITableViewRowAnimationLeft];
}

//DemoProtocal
import <Foundation/Foundation.h>


@protocol DemoProtocal <NSObject>
@optional
//用户点击按钮 触发事件： UI改变传值到model数据改变  UI --- > Model 点击cell 按钮
-(void)didClickCellAddBtnWithIndexPathRow:(NSInteger)index;
//model数据改变传值到UI界面刷新 Model --- > UI
-(void)reloadUI;
@end

//Presenter.h
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "DemoProtocal.h"

NS_ASSUME_NONNULL_BEGIN

@interface Presenter : NSObject
@property (nonatomic, strong,readonly) NSMutableArray *dataArray;
@property (nonatomic, weak) id<DemoProtocal>delegate;//协议，去更新主视图UI
// 更新 TableView UI 根据需求
- (void)requestDataAndUpdateUI;
//更新 cell UI
- (void)updateCell:(UITableViewCell*)cell withIndex:(NSInteger)index;
@end

//Controller 层
- (void)iniData{
? ? self.presenter = [[Presenter alloc] init];
? ? self.presenter.delegate = self;
? ? [self.presenter requestDataAndUpdateUI];
}
...

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
? ? return self.presenter.dataArray.count;
}
- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
? ??
? ? MVPTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell_identifer"];
? ? if(cell == nil){
? ? ? ? cell = [[MVPTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell_identifer"];
? ? }
? ? //更新cell UI 数据
? ? [self.presenter updateCell:cell withIndex:indexPath.row];
? ? cell.selectionStyle = UITableViewCellSelectionStyleNone;
? ? return cell;
}

#pragma mark - DemoProtocal
//Presenter 的代理回调 数据更新了通知View去更新视图
- (void)reloadUI{
? ? [self.mainTabelView reloadData];
}

//Cell
- (void)addBtnDown:(UIButton*)btn{
? ? NSLog(@"%s",__func__);
? ? if([self.delegate respondsToSelector:@selector(didClickCellAddBtnWithIndexPathRow:)]){
? ? ? ? [self.delegate didClickCellAddBtnWithIndexPathRow:self.index];
? ? }
}

//ViewModel.h

@interface ViewModel : NSObject
//发送数据请求的Rac，可以去订阅获取 请求结果
@property (nonatomic,strong,readonly) RACCommand *requestCommand;
@property (nonatomic,strong) NSArray *dataArr;//返回子级对象的ViewModel
- (CellViewModel *)itemViewModelForIndex:(NSInteger)index;
@end

@interface CellViewModel : NSObject

@property (nonatomic,copy,readonly) NSString *titleStr;

@property (nonatomic,copy,readonly) NSString *numStr;

@property (nonatomic,copy,readonly) RACCommand *addCommand;

- (instancetype)initWithModel:(DemoModel *)model;

@end

//controller
- (void)iniData{
? ? self.viewModel = [[ViewModel alloc] init];
? ? // 发送请求
? ? RACSignal *signal = [self.viewModel.requestCommand execute:@{@"page":@"1"}];
? ? [signal subscribeNext:^(id x) {
? ? ? ? NSLog(@"x=======%@",x);
? ? ? ? if([x boolValue] == 1){//请求成功
? ? ? ? ? ? [self.mainTabelView reloadData];
? ? ? ? }
? ? }];
}
- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
? ??
? ? MVVMTableVIewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell_identifer"];
? ? if(cell == nil){
? ? ? ? cell = [[MVVMTableVIewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell_identifer"];
? ? }
? ? //更新cell UI 数据
? ? cell.cellViewModel = [self.viewModel itemViewModelForIndex:indexPath.row];
? ? cell.selectionStyle = UITableViewCellSelectionStyleNone;
? ? ? ??
? ? return cell;
}

//TableViewCell

? ? RAC(self.titleLabel,text) = RACObserve(self, cellViewModel.titleStr);
? ? RAC(self.numLabel,text) = RACObserve(self, cellViewModel.numStr);

? ? [[self.addBtn rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(id x) {
? ? ? ? NSLog(@">>>>>");
? ? ? ? [self.cellViewModel.addCommand execute:nil];
? ? }];