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自己理解MVVM的实现（非正宗）

自己理解MVVM的实现（非正宗）

作者: 许久__ | 来源:发表于2021-09-05 18:40 被阅读0次

Model

CHSModel.h
//
//  CHSModel.h
//  CHSAPP
//
//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <Mantle/Mantle.h>

NS_ASSUME_NONNULL_BEGIN

@interface CHSModel:MTLModel <MTLJSONSerializing>

@property (nonatomic,strong) NSString *idMax;

@property (nonatomic,strong) NSString *ctime;

@property (nonatomic,strong) NSString *title;

@property (nonatomic,strong) NSString *descriptionMax;

@property (nonatomic,strong) NSString *source;

@property (nonatomic,strong) NSString *picUrl;

@property (nonatomic,strong) NSString *url;

@end

NS_ASSUME_NONNULL_END
CHSModel.m
//
//  CHSModel.m
//  CHSAPP
//
//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//

#import "CHSModel.h"

@implementation CHSModel

+ (NSDictionary *)JSONKeyPathsByPropertyKey {
    return @{
        @"idMax": @"id",
        @"descriptionMax": @"description",
        @"ctime": @"ctime",
        @"title": @"title",
        @"source": @"source",
        @"picUrl": @"picUrl",
        @"url": @"url"
    };
}

@end

NS_ASSUME_NONNULL_END

ViewModel

CHSViewModel .h
//
//  CHSViewModel.h
//  CHSAPP
//
//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "CHSModel.h"
#import "MGRefreshHeader.h"
#import "MGRefreshFooter.h"
#import <ReactiveObjC/ReactiveObjC.h>

NS_ASSUME_NONNULL_BEGIN

typedef void(^CHSFetchModelDatasHandle)(NSMutableArray<CHSModel *> *models);

@interface CHSViewModel : NSObject

@property (nonatomic, strong) RACSubject *subject;

- (void)fetchModelDatas:(MGRefreshHeader *)header withFooter:(MGRefreshFooter *)footer withPageSize:(double )pageSize withPageIndex:(double )pageIndex withHandle:(CHSFetchModelDatasHandle )handle withLocalData:(BOOL )localData;

//使用RAC：
- (void)signalModelDatas:(MGRefreshHeader *)header withFooter:(MGRefreshFooter *)footer withPageSize:(double )pageSize withPageIndex:(double )pageIndex withLocalData:(BOOL )localData;

@end

NS_ASSUME_NONNULL_END

ViewModel

CHSViewModel .m
//
//  CHSViewModel.m
//  CHSAPP
//
//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//

#import "CHSViewModel.h"
#import "MGRequestManager.h"

@interface CHSViewModel()

@property (nonatomic, strong) NSMutableArray<CHSModel *> *dataArrays;

@end

@implementation CHSViewModel

#pragma mark - Public Method
#pragma mark -

- (void)fetchModelDatas:(MGRefreshHeader *)header withFooter:(MGRefreshFooter *)footer withPageSize:(double )pageSize withPageIndex:(double )pageIndex withHandle:(CHSFetchModelDatasHandle )handle withLocalData:(BOOL )localData {
    NSMutableDictionary *paras = [[NSMutableDictionary alloc] init];
    [paras setObject:@"2dc95ae745b0d989a4f6cf8b53dcb930" forKey:@"key"];
    [paras setObject:@(pageSize) forKey:@"num"];
    [paras setObject:@(pageIndex) forKey:@"page"];
    [MGRequestManager requestWithType:MGHttpRequestTypeGet withUrlString:HOMENEWSDATA withParaments:paras withSuccessBlock:^(NSDictionary *feedBacks) {
        if ([[NSString stringWithFormat:@"%@",feedBacks[@"code"]] isEqualToString:@"200"]) {
            if (pageIndex == 1) {
                [self.dataArrays removeAllObjects];
                [header endRefreshing];
            }
            if ([[NSString stringWithFormat:@"%lu",(unsigned long)[feedBacks[@"newslist"] count]] isEqualToString:@"0"]) {
                if (pageIndex != 1) {
                } else {
                    footer.hidden = YES;
                    [footer endRefreshingWithNoMoreData];
                }
            } else {
                footer.hidden = NO;
                if (pageIndex != 1) {
                    [footer endRefreshing];
                }
                for (int i = 0; i<[feedBacks[@"newslist"] count]; i++) {
                    NSError *error = nil;
                    CHSModel *model = [MTLJSONAdapter modelOfClass:CHSModel.class    fromJSONDictionary:feedBacks[@"newslist"][i] error:&error];
                    [self.dataArrays addObject:model];
                }
            }
        }
        !handle ?: handle(self.dataArrays);
    } withFailureBlock:^(NSError *error) {
        !handle ?: handle([@[] mutableCopy]);
    }];
}

//使用RAC：
- (void)signalModelDatas:(MGRefreshHeader *)header withFooter:(MGRefreshFooter *)footer withPageSize:(double )pageSize withPageIndex:(double )pageIndex withLocalData:(BOOL )localData {
    NSMutableDictionary *paras = [[NSMutableDictionary alloc] init];
    [paras setObject:@"2dc95ae745b0d989a4f6cf8b53dcb930" forKey:@"key"];
    [paras setObject:@(pageSize) forKey:@"num"];
    [paras setObject:@(pageIndex) forKey:@"page"];
    [MGRequestManager requestWithType:MGHttpRequestTypeGet withUrlString:HOMENEWSDATA withParaments:paras withSuccessBlock:^(NSDictionary *feedBacks) {
        if ([[NSString stringWithFormat:@"%@",feedBacks[@"code"]] isEqualToString:@"200"]) {
            if (pageIndex == 1) {
                [self.dataArrays removeAllObjects];
                [header endRefreshing];
            }
            if ([[NSString stringWithFormat:@"%lu",(unsigned long)[feedBacks[@"newslist"] count]] isEqualToString:@"0"]) {
                if (pageIndex != 1) {
                } else {
                    footer.hidden = YES;
                    [footer endRefreshingWithNoMoreData];
                }
            } else {
                footer.hidden = NO;
                if (pageIndex != 1) {
                    [footer endRefreshing];
                }
                for (int i = 0; i<[feedBacks[@"newslist"] count]; i++) {
                    NSError *error = nil;
                    CHSModel *model = [MTLJSONAdapter modelOfClass:CHSModel.class    fromJSONDictionary:feedBacks[@"newslist"][i] error:&error];
                    [self.dataArrays addObject:model];
                }
            }
        }
        [self.subject sendNext:self.dataArrays];
    } withFailureBlock:^(NSError *error) {
        [self.subject sendNext:[@[] mutableCopy]];
    }];
    
}

#pragma mark - lazy load
#pragma mark -

- (NSMutableArray *)dataArrays {
    if (_dataArrays == nil) {
        _dataArrays = [[NSMutableArray alloc] init];
    }
    return _dataArrays;
}

//实例化rac:
- (RACSubject *)subject {
    if (_subject == nil) {
        _subject = [RACSubject subject];
    }
    return _subject;
}

@end

View

CHSView.h
//
//  CHSView.h
//  CHSAPP
//
//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//


#import <UIKit/UIKit.h>
#import "CHSModel.h"
#import "MGRefreshHeader.h"
#import "MGRefreshFooter.h"

NS_ASSUME_NONNULL_BEGIN

@protocol CHSViewDelegate <NSObject>

@optional

- (void)pullFresh;

- (void)loadMore;

- (void)excuteLogic:(CHSModel *)model;

@end

@interface CHSView : UIView {
}

@property (nonatomic, weak)id<CHSViewDelegate> delegate;

@property (nonatomic, strong) UITableView *tableView;

@property (nonatomic, strong) NSMutableArray <CHSModel *> *dataArrays;

@property (nonatomic, strong) MGRefreshHeader *mjRefreshNormalHeader;

@property (nonatomic, strong) MGRefreshFooter *mjRefreshBackNormalFooter;

@end

NS_ASSUME_NONNULL_END
CHSView.m
//
//  CHSView.m
//  CHSAPP
//
//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//

#import "CHSView.h"
#import "CHSTableViewCell.h"
#import "MGRefreshHeader.h"
#import <Masonry/Masonry.h>

@interface CHSView()<UITableViewDataSource,UITableViewDelegate> {
    
}

@end

@implementation CHSView

#pragma mark - LifeCycle
#pragma mark -

- (id)init {
    self = [super init ];//当前对象self
    if (self !=nil) {
        [self setUI];
    }
    return self;//返回一个已经初始化完毕的对象；
}

#pragma mark - Public Method
#pragma mark -

#pragma mark - Private Method
#pragma mark -

- (void)setUI {
    [self addSubview:self.tableView];
    [self setMas];
}

- (void)setMas {
    [self.tableView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self);
    }];
}

#pragma mark - IB-Action
#pragma mark -

- (void)pullFresh {
    if (self.delegate && [self.delegate respondsToSelector:@selector(pullFresh)]) {
        [self.delegate pullFresh];
    }
}

- (void)loadMore {
    if (self.delegate && [self.delegate respondsToSelector:@selector(loadMore)]) {
        [self.delegate loadMore];
    }
}

#pragma mark - Notice
#pragma mark -

#pragma mark - UITableViewDelegate && UITableViewDataSource
#pragma mark -

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

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    return 100;
}

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section {
    return [[UIView alloc] init];
}

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
    return 0.01;
}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
    return [[UIView alloc] init];
}

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
    return 0.01;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    CHSTableViewCell *viewCell = [tableView dequeueReusableCellWithIdentifier:NSStringFromClass([CHSTableViewCell class])];
    if (!viewCell) {
        viewCell = [[CHSTableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:NSStringFromClass([CHSTableViewCell class])];
        viewCell.selectionStyle = UITableViewCellSelectionStyleNone;
    }
    CHSModel *model = self.dataArrays[indexPath.row];
    viewCell.model = model;
    __weak typeof(self)weakSelf = self;
    viewCell.handle = ^{
    };
    return viewCell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    CHSModel *model = [self.dataArrays objectAtIndex:indexPath.row];
    if (self.delegate && [self.delegate respondsToSelector:@selector(excuteLogic:)]) {
        [self.delegate excuteLogic:model];
    }
}

#pragma mark - lazy load
#pragma mark -

- (UITableView *)tableView {
    if (!_tableView) {
        _tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStyleGrouped];
        _tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
        _tableView.dataSource = self;
        _tableView.delegate = self;
        _tableView.backgroundColor = [UIColor whiteColor];
        [_tableView registerClass:CHSTableViewCell.self forCellReuseIdentifier:NSStringFromClass([CHSTableViewCell class])];
        _tableView.mj_header = self.mjRefreshNormalHeader;
        _tableView.mj_footer = self.mjRefreshBackNormalFooter;
        if (@available(iOS 11.0, *)) {
            _tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
        }
    }
    return _tableView;
}

- (MGRefreshHeader *)mjRefreshNormalHeader {
    if (!_mjRefreshNormalHeader) {
        _mjRefreshNormalHeader = [MGRefreshHeader headerWithRefreshingTarget:self refreshingAction:@selector(pullFresh)];
    }
    return _mjRefreshNormalHeader;
}

- (MGRefreshFooter *)mjRefreshBackNormalFooter {
    if (!_mjRefreshBackNormalFooter) {
        _mjRefreshBackNormalFooter = [MGRefreshFooter footerWithRefreshingTarget:self refreshingAction:@selector(loadMore)];
    }
    return _mjRefreshBackNormalFooter;
}

- (NSMutableArray *)dataArrays {
    if (_dataArrays == nil) {
        _dataArrays = [[NSMutableArray alloc] init];
    }
    return _dataArrays;
}

@end
CHSTableViewCell.h
//
//  CHSTableViewCell.h
//  CHSAPP

//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "CHSModel.h"

typedef void (^CHSAPPRemoveHanlde)(void);

NS_ASSUME_NONNULL_BEGIN

@interface  CHSTableViewCell : UITableViewCell

@property (nonatomic, copy) CHSAPPRemoveHanlde handle;

@property (nonatomic, strong) CHSModel *model;

@end

NS_ASSUME_NONNULL_END
CHSTableViewCell.m
//
//  CHSTableViewCell.m
//  CHSAPP
//
//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//

#import "CHSTableViewCell.h"
#import "CHSEnlargeButton.h"

#import <Masonry/Masonry.h>
#import <SDWebImage/SDWebImage.h>
#import <ReactiveObjC/ReactiveObjC.h>

@interface CHSTableViewCell()

@property (nonatomic, strong) UILabel *titleLabel;

@property (nonatomic, strong) UILabel *bottomLabel;

@property (nonatomic, strong) UIImageView *picImageView;

@property (nonatomic, strong) CHSEnlargeButton *removeButton;

@end

@implementation CHSTableViewCell

#pragma mark - LifeCycle
#pragma mark -

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        self.selectionStyle =  UITableViewCellSelectionStyleNone;
        [self setUI];
    }
    return self;
}

#pragma mark - Public Method
#pragma mark -

- (void)setModel:(CHSModel *)model {
    [RACObserve(model,title) subscribeNext:^(NSString *x) {
            self.titleLabel.text = x;
    }];
    [RACObserve(model,picUrl) subscribeNext:^(NSString *x) {
        [self.picImageView sd_setImageWithURL:[NSURL URLWithString:x] placeholderImage:nil];
    }];
    self.bottomLabel.text = [NSString stringWithFormat:@"%@   头条 %@",model.source,model.ctime];
}

#pragma mark - Private Method
#pragma mark -

- (void)setUI {
    [self.contentView addSubview:self.titleLabel];
    [self.contentView addSubview:self.bottomLabel];
    [self.contentView addSubview:self.picImageView];
    [self.contentView addSubview:self.removeButton];
    [self setMas];
}

- (void)setMas {
    [self.picImageView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(self.contentView);
        make.right.equalTo(self.contentView.mas_right).offset(-16);
        make.size.equalTo(@(CGSizeMake(120, 80)));
    }];
    
    [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.picImageView.mas_top);
        make.left.equalTo(self.contentView.mas_left).offset(16);
        make.right.equalTo(self.picImageView.mas_left).offset(-16);
    }];
    
    [self.removeButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.bottom.equalTo(self.picImageView.mas_bottom);
        make.right.equalTo(self.picImageView.mas_left).offset(-16);
    }];
    
    [self.bottomLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerY.equalTo(self.removeButton);
        make.left.equalTo(self.contentView.mas_left).offset(16);
        make.right.equalTo(self.picImageView.mas_right).offset(-72);
    }];
}

- (void)awakeFromNib {
    [super awakeFromNib];
    // Initialization code
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];
}

#pragma mark - IB-Action
#pragma mark -

- (void)toRemove:(UIButton *)sender {
    !self.handle ?: self.handle();
}

#pragma mark - lazy load
#pragma mark -

- (UILabel *)titleLabel {
    if(_titleLabel == nil) {
        _titleLabel = [[UILabel alloc] init];
        _titleLabel.numberOfLines = 2;
        _titleLabel.textColor = [UIColor blackColor];
        _titleLabel.font = [UIFont systemFontOfSize:14];
    }
    return _titleLabel;
}

- (UILabel *)bottomLabel {
    if(_bottomLabel == nil) {
        _bottomLabel = [[UILabel alloc] init];
        _bottomLabel.numberOfLines = 1;
        _bottomLabel.textColor = [UIColor grayColor];
        _bottomLabel.font = [UIFont systemFontOfSize:10];
    }
    return _bottomLabel;
}

- (UIImageView *)picImageView {
    if(_picImageView == nil) {
        _picImageView = [[UIImageView alloc] init];
        _picImageView.layer.cornerRadius = 6.0;
        _picImageView.layer.masksToBounds = YES;
    }
    return _picImageView;
}

- (CHSEnlargeButton *)removeButton {
    if (!_removeButton) {
        _removeButton = [[CHSEnlargeButton alloc] init];
        _removeButton.enlargeEdge_hsa = UIEdgeInsetsMake(5, 5, 5, 5);
        [_removeButton setImage:[UIImage imageNamed:@"hsa_app_share_close"] forState:UIControlStateNormal];
        [_removeButton addTarget:self action:@selector(toRemove:) forControlEvents:UIControlEventTouchUpInside];
    }
    return _removeButton;
}

@end

Controller

CHSViewController.h
//
//  CHSViewController.h
//  CHSAPP
//
//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "CHSView.h"

@interface CHSViewController : UIViewController

@property (nonatomic, strong) CHSView *chsView;

@end
CHSViewController.m
//
//  CHSViewController.m
//  CHSAPP
//
//  Created by stone on 2021/8/24.
//  Copyright © 2021 stone. All rights reserved.
//

#import "CHSViewController.h"

#import <Masonry/Masonry.h>
#import "CHSModel.h"
#import "CHSViewModel.h"

@interface CHSViewController ()<CHSViewDelegate>

@property (nonatomic, strong) CHSViewModel *viewModel;

@property (nonatomic, assign) double pageIndex;
@property (nonatomic, assign) double pageSize;

@end

@implementation CHSViewController

#pragma mark - LifeCycle
#pragma mark -

- (instancetype)init {
    self = [super init];
    if (self) {
        self.pageIndex = 1;
        self.pageSize = 10;
    }
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    //订阅信号：
    [self subscribeSignal];
    [self setUI];
    [self fireRequest];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
}

#pragma mark - Public Method
#pragma mark -

#pragma mark - Private Method
#pragma mark -

- (void)setUI {
    [self.view addSubview:self.chsView];
    [self setMas];
}

- (void)setMas {
    [self.chsView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.view.mas_top).offset(StatusBarH+NaviBarH);
        make.bottom.equalTo(self.view.mas_bottom).offset(-TabBarH);
        make.left.equalTo(self.view.mas_left);
        make.right.equalTo(self.view.mas_right);
    }];
}

- (void)subscribeSignal {
    __weak typeof(self)weakSelf = self;
    [self.viewModel.subject subscribeNext:^(id  _Nullable x) {
        NSMutableArray<CHSModel *> *models = (NSMutableArray<CHSModel *> *)x;
        __strong typeof(weakSelf) strongSelf = weakSelf;
        strongSelf.chsView.dataArrays = models;
        [strongSelf.chsView.tableView reloadData];
    }];
}

- (void)fireRequest {
//    __weak typeof(self)weakSelf = self;
//    [self.viewModel fetchModelDatas:self.chsView.mjRefreshNormalHeader withFooter:self.chsView.mjRefreshBackNormalFooter withPageSize:self.pageSize withPageIndex:self.pageIndex withHandle:^(NSMutableArray<CHSModel *> * _Nonnull models) {
//        __strong typeof(weakSelf) strongSelf = weakSelf;
//        strongSelf.chsView.dataArrays = models;
//        [strongSelf.chsView.tableView reloadData];
//    }];
    [self.viewModel signalModelDatas:self.chsView.mjRefreshNormalHeader withFooter:self.chsView.mjRefreshBackNormalFooter withPageSize:self.pageSize withPageIndex:self.pageIndex];
}

#pragma mark - IB-Action
#pragma mark -


#pragma mark - CHSViewDelegate
#pragma mark -


#pragma mark - Delegate
#pragma mark -

- (void)pullFresh {
    self.pageIndex = 1;
    [self fireRequest];
}

- (void)loadMore {
    self.pageIndex  = self.pageIndex + 1;
    [self fireRequest];
}

- (void)excuteLogic:(CHSModel *)model {
    
}

#pragma mark - Lazy load

- (CHSView *)chsView
{
    if (!_chsView) {
        _chsView = [[CHSView alloc] init];
        _chsView.delegate = self; //将CHSViewController自己的实例作为委托对象
    }
    return _chsView;
}

- (CHSViewModel *)viewModel {
    if (_viewModel == nil) {
        _viewModel = [[CHSViewModel alloc] init];
    }
    return _viewModel;
}

@end

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