IRCollectionTableViewModel

• IRCollectionTableViewModel is a powerful MVVM Tableview/CollectionView for iOS, which is flexible and can easy to handle and reuse.

Features

• MVVM structure.
• Flexible, Reusable.

Install

Git

• Git clone this project.
• Copy this project into your own project.
• Add the .xcodeproj into you project and link it as embed framework.

Options

• You can remove the demo and ScreenShots folder.

Cocoapods

• Add pod 'IRCollectionTableViewModel' in the Podfile
• pod install

Introduction MVVM

• Model--view--viewmodel (MVVM) is a software architectural pattern.
• It has advantages more than the tranditional MVC architectural. Can improve the whole code strurcture.
• More detail can see the MVVM wikipedia. MVVM

Usage

Basic

TableView

• Create a new class TableViewViewModel extends TableViewBasicViewModel<UITableViewDataSource>, and Import IRCollectionTableViewModel

#import <IRCollectionTableViewModel/IRCollectionTableViewModel.h>

@interface TableViewViewModel : TableViewBasicViewModel<UITableViewDataSource>

@end

• You can add your init method and register the cell inside

- (instancetype)initWithTableView:(UITableView*)tableView;

...

- (instancetype)initWithTableView:(UITableView *)tableView {
    if (self = [super init]) {
        items = [[NSMutableArray<id<SectionModelItem>> alloc] init];
        
        [tableView registerNib:[UINib nibWithNibName:CELL_NIB_NAME bundle:nil] forCellReuseIdentifier:CELL_IDENTIFIER];
    }
    return self;
}

• Add update method

- (void)update;

...

- (void)update {
    [items removeAllObjects];
    // Setup items
    // [self setupRows];
}

• For setup items, other words, setup the sections/rows you want to show. Create TableViewSectionItem and TableViewRowItem, DemoSectionType, DemoRowType

typedef NS_ENUM(NSInteger, DemoSectionType){
    DemoSection
};

typedef NS_ENUM(NSInteger, DemoRowType){
    RowType_DemoRow
};

@interface TableViewRowItem : RowBasicModelItem
@property (readonly) DemoRowType type;
@end

@interface TableViewSectionItem : SectionBasicModelItem
@property (nonatomic) NSString* sectionTitle;
@property (nonatomic) SectionType type;
@end

• Implementation TableViewSectionItem and TableViewRowItem in the TableViewViewModel.m

@implementation TableViewRowItem
@dynamic type;
@end

@implementation TableViewSectionItem
@end

• Setup items

- (void)setupRows {
    NSMutableArray *rowItems = [NSMutableArray array];
    [rowItems addObject:[[TableViewRowItem alloc] initWithType:RowType_DemoRow withTitle:@"Demo Row"]];
    [rowItems addObject:[[TableViewRowItem alloc] initWithType:RowType_DemoRow withTitle:@"Demo Row"]];
    
    NSArray *demoRowItems = [NSArray arrayWithArray:rowItems];
    TableViewSectionItem *item = [[TableViewSectionItem alloc] initWithRowCount:[demoRowItems count]];
    item.type = DemoSection;
    item.sectionTitle = @"Demo Section";
    item.rows = demoRowItems;
    [items addObject:item];
}

• Override UITableViewDataSource

#pragma mark - UITableViewDataSource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return items.count;
}

- (NSInteger)tableView:(nonnull UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [items[section] rowCount];
}

- (nonnull UITableViewCell *)tableView:(nonnull UITableView *)tableView cellForRowAtIndexPath:(nonnull NSIndexPath *)indexPath {
    id<SectionModelItem> item = [items objectAtIndex:indexPath.section];
    TableViewRowItem *row = (TableViewRowItem *)[item.rows objectAtIndex:[indexPath row]];
    
    switch (item.type) {
        case DemoSection:
        {
            switch (row.type) {
                case RowType_DemoRow:
                {
                    TableViewCell *cell = (TableViewCell *)[tableView dequeueReusableCellWithIdentifier:TableViewCell.identifier forIndexPath:indexPath];
                    cell.titleLabel.text = [NSString stringWithFormat:@"%@%ld", row.title, row.tagRange.location];
                    cell.editTextField.text = [editedTexts objectAtIndex:indexPath.row];
                    cell.editTextField.tag = row.tagRange.location;
                    cell.editTextField.delegate = self;
                    return cell;
                }
            }
            break;
        }
        default:
            break;
    }
    return [[UITableViewCell alloc] init];
}

• Use your view model TableViewViewModel

#import "TableViewViewModel.h"

@implementation TableViewController {
    TableViewViewModel *viewModel;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self.tableView registerNib:[UINib nibWithNibName:HEADER_VIEW_NIB_NAME bundle:nil] forHeaderFooterViewReuseIdentifier:HEADER_VIEW_IDENTIFIER];
    viewModel = [[TableViewViewModel alloc] initWithTableView:_tableView];
    _tableView.dataSource = viewModel;
    [viewModel update];
}

@end

CollectionView

• Just the same way of TableViewViewModel. Create a new class CustomCollectionViewModel extends TableViewBasicViewModel<UICollectionViewDataSource>, and Import this CustomCollectionViewModel to view controller

• You can add your init method and register the cell inside

• For setup items, other words, setup the sections/rows you want to show. Create CustomCollectionSectionItem and CustomCollectionRowItem, CustomCollectionSectionType

• Override UICollectionViewDataSource

Advanced settings

Methos of TableViewBasicViewModel

• TableViewBasicViewModel provides some usage methods

- (NSInteger)getRowTypeWith:(SectionType)type row:(NSInteger)row;
- (NSString *)getSectionTitleinSection:(NSInteger)section;
- (UIImage *)getSectionLeftIconinSection:(NSInteger)section;
- (SectionType)getSectionTypeinSection:(NSInteger)section;
- (void)hideRows:(BOOL)hide inSection:(NSInteger)section;
- (BOOL)hiddenRowsinSection:(NSInteger)section;
- (NSIndexSet *)getIndexSetWithSectionType:(SectionType)sectionType;
- (NSIndexPath *)getIndexPathWithSectionType:(SectionType)sectionType rowType:(RowType)rowType;
- (void)setupRowTag;
- (NSIndexPath *)getIndexPathFromRowTag:(NSInteger)rowTag;

Tag

• Because the cells have reuse feature, somtimes we need to tag the cell/componenst if want to recognize the specific cell/components, thus IRCollectionTableViewModel provides a tag feature

• Setup tags by setupRowTag, it save the tag information in the tagRange which is in the RowBasicModelItem

- (void)setupRows {
    ...
    
    [self setupRowTag];
}

• Get tag

TableViewRowItem *row = (TableViewRowItem *)[item.rows objectAtIndex:[indexPath row]];
tag = row.tagRange.location;

• Get indexPath by tag

- (NSIndexPath *)getIndexPathFromRowTag:(NSInteger)rowTag;

• Sometimes you want to tag the UI components like UITextField, use setTagRangeLength

TableViewRowItem *row = [[TableViewRowItem alloc] initWithType:RowType_DemoRow withTitle:@"Demo Row"];
[row setTagRangeLength:2];

...

[self setupRowTag];

• Then get tags

TableViewRowItem *row = (TableViewRowItem *)[item.rows objectAtIndex:[indexPath row]];
tag1 = row.tagRange.location;
tag2 = row.tagRange.location + 1;

cell.textField1.tag = tag1;
cell.textField2.tag = tag2;

• The tags are mapping to the same index path

[self getIndexPathFromRowTag:tag1] == [self getIndexPathFromRowTag:tag2]

Now, you can easy to tag anyhing you want.

Get Row Type

• Hide rows for specific setion by (void)hideRows:(BOOL)hide inSection:(NSInteger)section

- (NSInteger)getRowTypeWith:(SectionType)type row:(NSInteger)row;

Get Section Title

• Get section title which set in the SectionBasicModelItem

- (NSString *)getSectionTitleinSection:(NSInteger)section;

Get Section Left Icon

• Get section icon which set in the SectionBasicModelItem

- (UIImage *)getSectionLeftIconinSection:(NSInteger)section;

Get Section Type

• Get section type by section index

- (SectionType)getSectionTypeinSection:(NSInteger)section;

Hide Rows

• Hide rows for specific setion by (void)hideRows:(BOOL)hide inSection:(NSInteger)section
• Check hidden status by (BOOL)hiddenRowsinSection:(NSInteger)section

- (void)hideRows:(BOOL)hide inSection:(NSInteger)section;
- (BOOL)hiddenRowsinSection:(NSInteger)section;

Get Index Set

• Get index of section by section type

- (NSIndexSet *)getIndexSetWithSectionType:(SectionType)sectionType;

Get IndexPath

• Get index path by section type and row type

- (NSIndexPath *)getIndexPathWithSectionType:(SectionType)sectionType rowType:(RowType)rowType;

Screenshots

TableView	CollectionView