Ios 项目从头开发 MVVM模式(三)

1.话说，本来想做个聚合查询功能，但是我的重点想研究xmpp聊天功能。所以使用mvvm模式做了完全模式51job主界面的页面。

2.首先给大家看我运行起来的界面。

3.界面很简单，做这个界面主要是为了比较mvvm模式和mvc模式之间的区别。

4.这个界面的结构是下边这张图片

与mvc相比，我多了一个viewmodel文件。

mvc之前是把业务逻辑和数据放在viewcontroller里边，逻辑复杂的话，别人维护起来很麻烦。

我就不贴viewcontroller的图片了，我把这个代码上传给大家，大家可以看看，和mvc相比，是不是很容易维护，代码层级会好一些。明天开始研究iosxmpp的聊天功能，所以会暂停一段时间更新。

没办法，看来只能贴代码了，我只贴viewcontroller和viewmodel的代码，大家可以比较下。

这是viewcontroller

#import <UIKit/UIKit.h>

@class MTSOnlineViewModel;

@interface MTSOnlineViewController :UITableViewController

@property(strong,nonatomic)MTSOnlineViewModel *onlineViewModel;

@end

#import "MTSOnlineViewController.h"

#import "MTSOnlineViewModel.h"

#import "MTSOnlineMenuCell.h"

@interface MTSOnlineViewController()<MTSOnlineMenuDelegate>

@end

@implementation MTSOnlineViewController

#pragma mark - UIViewController Overrides

- (void)awakeFromNib

{

    [ super awakeFromNib];

}

- (void)viewDidLoad

{

    [ super viewDidLoad];

    self .onlineViewModel=[[MTSOnlineViewModelalloc] init];

    [ self . tableView setRowHeight:130.0f];

    [ self . tableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];

    @weakify(self);

    [ self .onlineViewModel.updatedContentSignalsubscribeNext:^(id x) {

        @strongify(self);

        [self.tableViewreloadData];

    }];

}

-(void)viewWillAppear:(BOOL)animated {

    [superviewWillAppear:animated];

    self .onlineViewModel.active =YES;

}

#pragma mark - Table View

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    return [ self .onlineViewModelnumberOfItems];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    MTSOnlineMenuCell *cell = [tableViewdequeueReusableCellWithIdentifier:@"onlinecell"forIndexPath:indexPath];

    cell. selectionStyle =UITableViewCellSelectionStyleNone;

    cell.delegate=self;

    [cell configureCell : self .onlineViewModel.tableDataSourceindex:indexPath.row+1];

   return cell;

}

#pragma mark --cell delegate

-(void)pressMenuButton:(MTSMenuType)type title:(NSString*)title;

{

     [[[ UIAlertView alloc] initWithTitle:@"按钮测试"message:title delegate:nilcancelButtonTitle:@"确认"otherButtonTitles:nil,nil] show];

}

@end

这是viewmodel

#import "RVMViewModel.h"

@interface MTSOnlineViewModel :RVMViewModel

@property (nonatomic,readonly) RACSignal *updatedContentSignal;

@property (nonatomic,readonly) NSMutableArray *tableDataSource;

-(NSInteger)numberOfItems;

@end

#import "MTSOnlineViewModel.h"

#import "MTSMenuModel.h"

@interface MTSOnlineViewModel ()

@property (nonatomic,strong) RACSubject *updatedContentSignal;

@property (nonatomic,strong) NSMutableArray *tableDataSource;

@end

@implementation MTSOnlineViewModel

-(instancetype)init {

   self = [superinit];

    if (self ==nil) returnnil;

    self . updatedContentSignal = [[ RACSubject subject ] setNameWithFormat :@"MTSOnlineViewModel updatedContentSignal"];

   self.tableDataSource = [[NSMutableArrayalloc] init];

    @weakify(self)

    [ self .didBecomeActiveSignalsubscribeNext:^(id x) {

        @strongify(self);

        [ self menuDataSource];

    }];

    return self;

}

#pragma mark - Public Methods

-(NSInteger)numberOfItems{

   NSUInteger count = [self.tableDataSourcecount]/3;

   return [self.tableDataSourcecount]%3==0?count:count+1;

}

-(void)menuDataSource{

    [ self . tableDataSource addObject :[[ MTSMenuModel alloc ] init :@"职位搜索"imagePath:@"jobsearch.png"imagePressPath:@"jobsearch_press.png"type:JobSearch]];

    [ self . tableDataSource addObject :[[ MTSMenuModel alloc ] init :@"校园招聘"imagePath:@"campus.png"imagePressPath:@"campus_press.png"type:Campus]];

    [ self . tableDataSource addObject :[[ MTSMenuModel alloc ] init :@"职场资讯"imagePath:@"worknews.png"imagePressPath:@"worknews_press.png"type:WorkNews]];

    [ self . tableDataSource addObject :[[ MTSMenuModel alloc ] init :@"企业粉丝团"imagePath:@"fans.png"imagePressPath:@"fans_focus.png"type:Fans]];

    [ self . tableDataSource addObject :[[ MTSMenuModel alloc ] init :@"My 51job"imagePath:@"my51job.png"imagePressPath:@"my51job_focus.png"type:My51Job]];

    [ self . tableDataSource addObject :[[ MTSMenuModel alloc ] init :@"简历中心"imagePath:@"resumecenter.png"imagePressPath:@"resumecenter_focus.png"type:Resumecenter]];

    [self.tableDataSource addObject:[[MTSMenuModel alloc] init:@"薪酬咨询" imagePath:@"salaryquery.png" imagePressPath:@"salaryquery_focus.png" type:Salaryquery]];

    [self.tableDataSource addObject:[[MTSMenuModel alloc] init:@"申请记录" imagePath:@"jobapply.png" imagePressPath:@"jobapply_focus.png" type:JobApply]];

    [self.tableDataSource addObject:[[MTSMenuModel alloc] init:@"更多" imagePath:@"themore.png" imagePressPath:@"themore_focus.png" type:TheMore]];

}

@end

原文：http://blog.csdn.net/wangzhi8910/article/details/40791209