第二十七篇、使用MVVM布局页面

思路：架构的设计模式主要有这么两种

　　>MVC ：这种方式用得很多，也很是常见，不在过多的介绍

　　>MVVM：使用这种 常常需要导入第三方框架，常见的是响应式框架

　　　　>主要讲一下ViewModel : ViewModel 主要管理的使用是一些（不归类于Model 或者 Controller）的业务逻辑，常见的是一些网络请求，布局的一些逻辑

　　

下面还是举个简单明了的例子好了！MVVM来了。。。

先Model（模型）
@interface MyAssetsModel : NSObject

@property (nonatomic,copy) NSString *typeStr;//现金余额，路费宝余额
@property (nonatomic,copy) NSString *detailStr;//现金明细，路费宝明细
@property (nonatomic,copy) NSString *money;
@property (nonatomic,copy) NSString *getMoney;//余额提现，兑换现金
@property (nonatomic,copy) NSString *desc;//描述

@end

ViewModel的.h文件（主要用来处理一些不归类为Controller和Model,如网络请求等等）
#import <Foundation/Foundation.h>
#import "MyAssetsModel.h"
@interface MyAssetsViewModel : NSObject

@property (nonatomic,   copy) NSString *cellName;

@property (nonatomic,   copy) NSString *cellId;

@property (nonatomic, assign) CGFloat   cellheight;

- (instancetype)initWidthModel:(MyAssetsModel *)model;

@end


.m文件
@implementation MyAssetsViewModel

- (instancetype)initWidthModel:(MyAssetsModel *)model
{
    MyAssetsViewModel *viewModel = [[MyAssetsViewModel alloc] init];

    viewModel.cellName = @"MyAssetsTableViewCell";
    viewModel.cellId   = @"MyAssetsTableViewCellId";
    viewModel.cellheight = [NSString sizeWithString:model.desc font:[UIFont systemFontOfSize:[PublicUnit CGRectMakeX:]] ParagrapGap:[PublicUnit CGRectMakeX:] withMaxSize:CGSizeMake(SCREEN_WIDTH- [PublicUnit CGRectMakeX:], )].height+[PublicUnit CGRectMakeX:];

    return viewModel;
}

@end


下面是Controller（控制器）
#import "FPHMyAssetsViewController.h"
#import "MyAssetsTableViewCell.h"
#import "MyAssetsModel.h"
#import "MyAssetsViewModel.h"
#import "FPHBalanceVC.h"
#import "FPHDrawCashVC.h"
#import "FPHRuleCashVC.h"
@interface FPHMyAssetsViewController ()<UITableViewDelegate,UITableViewDataSource>

@property (nonatomic,strong) UITableView *tableView;
@property (nonatomic,strong) NSMutableArray *dataArray;
@property (nonatomic,strong) NSMutableArray *dataViewModelArray;

@end

@implementation FPHMyAssetsViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setBaseView];
    [self registCell];
}
- (void)setBaseView
{
    self.title = @"我的资产";
    [self.view addSubview:self.tableView];
    [self requestWalletRecord];

}

- (void)registCell
{
    [self.tableView registerClass:[MyAssetsTableViewCell class] forCellReuseIdentifier:@"MyAssetsTableViewCellId"];

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.dataArray.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    MyAssetsViewModel *viewModel = _dataViewModelArray[indexPath.row];
    if (!viewModel) {
        return nil;
    }

    if ([viewModel.cellName isEqualToString:@"MyAssetsTableViewCell"]) {

        MyAssetsTableViewCell *cell = (MyAssetsTableViewCell*)[tableView dequeueReusableCellWithIdentifier:viewModel.cellId forIndexPath:indexPath];
        [cell cellFilledWithModel:_dataArray[indexPath.row]];
        cell.myAssetsBlock = ^(MyAssetsModel *model){
            if ([model.getMoney isEqualToString:@"余额提现"]) {
                [NSUserDefaults setInteger: forKey:RightNow];
                NSString *money = model.money;
                [NSUserDefaults setFloat:[money floatValue] forKey:CrashMoney];
                FPHDrawCashVC *vc = [[FPHDrawCashVC alloc] init];
                [[self navigationController] pushViewController:vc animated:YES];
            }else
            {
                [NSUserDefaults setInteger: forKey:RightNow];
                NSString *money =  model.money;
                [NSUserDefaults setFloat:[money floatValue] forKey:CrashMoney];
                FPHRuleCashVC *vc = [[FPHRuleCashVC alloc] init];
                [self.navigationController pushViewController:vc animated:YES];
            }
        };

        return cell;
    }

    return nil;

}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    MyAssetsViewModel *viewModel = self.dataViewModelArray[indexPath.row];
    return viewModel.cellheight;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

        if (indexPath.row == ) {
            FPHBalanceVC *vc = [[FPHBalanceVC alloc] init];
            vc.balanceStatus = ;
            [self.navigationController pushViewController:vc animated:YES];
    }else{

            FPHBalanceVC *vc = [[FPHBalanceVC alloc] init];
            vc.balanceStatus = ;
            [self.navigationController pushViewController:vc animated:YES];

    }
}

#pragma mark --
#pragma mark -- setter and getter
- (UITableView *)tableView
{
    if (!_tableView) {
        _tableView = [[UITableView alloc] initWithFrame:CGRectMake(, , SCREEN_WIDTH, SCREEN_HEIGHT)];
        _tableView.delegate = self;
        _tableView.dataSource = self;
        _tableView.backgroundColor = UIColorWithHexRGB(0xf5f5f5);
        _tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
        _tableView.tableHeaderView = [self addHeader];
    }
    return _tableView;
}

//tableview header
- (UIView *)addHeader
{
    UIView *header = [[UIView alloc] initWithFrame:CGRectMake(, , SCREEN_WIDTH, [PublicUnit CGRectMakeX:])];
    UIImageView *imgView = [[UIImageView alloc] initWithFrame:header.bounds];
    imgView.image = [UIImage imageNamed:@"bg_mymoney"];
    [header addSubview:imgView];
    return header;
}

- (NSMutableArray *)dataArray
{
    if (!_dataArray) {
        _dataArray = [NSMutableArray array];
        MyAssetsModel *model1 = [[MyAssetsModel alloc] init];
        model1.typeStr =@"现金余额";
        model1.detailStr = @"现金明细";
        model1.money = @"0.00";
        model1.getMoney = @"余额提现";
        model1.desc = @"现金余额可以及时转出提现，直接转到自己的银行卡或支付宝。";
        [_dataArray addObject:model1];
        MyAssetsModel *model2 = [[MyAssetsModel alloc] init];
        model2.typeStr =@"路费宝余额";
        model2.detailStr = @"路费宝明细";
        model2.money = @"802.00";
        model2.getMoney = @"兑换现金";
        model2.desc = @"路费宝主要通过领路费、分享楼盘、邀请好友看房以及参与房品汇活动获得。路费宝只能兑换到现金余额，每次兑换必须是68的倍数。";
        [_dataArray addObject:model2];
    }
    return _dataArray;
}

- (NSMutableArray *)dataViewModelArray
{
    if (!_dataViewModelArray) {
        _dataViewModelArray = [NSMutableArray array];
        for (MyAssetsModel *model in self.dataArray) {
            MyAssetsViewModel *viewModel = [[MyAssetsViewModel alloc] initWidthModel:model];
            [_dataViewModelArray addObject:viewModel];
        }
    }
    return _dataViewModelArray;
}