iOS 做一个动态配置的大首页

作者: 隔壁班小明 | 来源:发表于2023-05-14 17:42 被阅读0次

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对于电商App来说，首页一般都是一个多个内容聚合的页面。整体是列表但是里面内容特别杂。所以写代码的时候就要考虑逻辑要清晰，还要对类型的扩展要容易。
下面根据我18年写的一个代码说下这个事（主要是需求更新这部分代码没用了，去掉前留个纪念）。

先看下效果：

May-15-2023 16-58-25.gif
说一下这个需求，因为时间有点长记得不是很清楚了，就大致说下，头试图，cell，尾视图都有多种样式。根据相邻两个cell的样式不同间距也可能不同。

实现方案

整体结构：

页面整体就是一个collectionView，每一条后端数据都对应一个section，这样做的目的：1每一条数据都可能携带头部信息和尾部信息(不携带头部尾部时可以拼接在一起)，2可能存在有二维数据的情况

1UI上拼接显示：

image.png
2:二维的数据：

image.png

代码实现

然后就是collectionView的代码的写法问题了。整体来看大的结构就是抽象工厂加策略
一，我写了一个管理类通过管理类现实cell的代理，把动态楼层(下面我们就这么叫吧)相关的逻辑拿了出来。只放了部分代码主要讲解思路。
调用部分

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
    //动态模块section下的item
    KFZShopHomeCardsModel * cards = [_dataModel.cardsModel.localCardsList objectAtIndexCheck:section];
    return [KFZMainPageModuleCreater moduleItemCountWithModel:cards];
}

- (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    //动态模块创建
    KFZShopHomeCardsModel * cards = [_dataModel.cardsModel.localCardsList objectAtIndexCheck:indexPath.section];
    return [KFZMainPageModuleCreater createCellWithModel:cards CollectionView:collectionView IndexPath:indexPath];
}

工具类内部

@interface KFZDynamicModuleCellCeater : NSObject

//----cell
+(UICollectionViewCell *)createCellWithModel:(KFZShopHomeCardsModel *)moduleModel CollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath;
+(NSInteger)moduleItemCountWithModel:(KFZShopHomeCardsModel *)moduleModel;
+(void)moduleItemClickWithModel:(KFZShopHomeCardsModel *)moduleModel IndexPath:(NSIndexPath *)indexPath;
+(CGSize)moduleItemSizeWithModel:(KFZShopHomeCardsModel *)moduleModel IndexPath:(NSIndexPath *)indexPath;

//----headerView
+(UICollectionReusableView *)createHeaderViewWithModel:(KFZShopHomeCardsModel *)moduleModel CollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath;
+(CGSize)moduleIHeaderSizeWithModel:(KFZShopHomeCardsModel *)moduleModel;
+(UICollectionReusableView *)defautCollectionReusableViewCollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath;

//----footerView
+(UICollectionReusableView *)createFooterViewWithModel:(KFZShopHomeCardsModel *)moduleModel CollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath;
+(CGSize)moduleIFooterSizeWithModel:(KFZShopHomeCardsModel *)moduleModel;
+(UICollectionReusableView *)defautCollectionFooterViewCollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath;
+(CGFloat)sameModuleSpaceHeight:(CardsType)cardType;


//----sectionLayout section各种间距
+(UIEdgeInsets)sectionInsetsWithModel:(KFZShopHomeCardsModel *)moduleModel;
+(CGFloat)sectionLineSpacingWithModel:(KFZShopHomeCardsModel *)moduleModel;
+(CGFloat)sectionItemSpacingWithModel:(KFZShopHomeCardsModel *)moduleModel;

//---regist
+(void)registAllClassIdentifirsCollectionView:(UICollectionView *)collectView;

@end

@implementation KFZDynamicModuleCellCeater
#pragma mark - 模块下 Cell

/**
 根据 模块的类型 创建cell
 
 @param moduleModel 模块数据
 @param collectionView 当前的collectionView
 @param indexPath 当前indexPath
 @return 创建的cell
 */
+(UICollectionViewCell *)createCellWithModel:(KFZShopHomeCardsModel *)moduleModel CollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath{
    return [[KFZDynamicModuleConfig factoryConfig:moduleModel.winddowShowType] createCellWithModel:moduleModel CollectionView:collectionView IndexPath:indexPath];
}

/**
 item的size
 
 @param moduleModel 数据
 @param indexPath 位置
 @return 计算出的size
 */
+(CGSize)moduleItemSizeWithModel:(KFZShopHomeCardsModel *)moduleModel IndexPath:(NSIndexPath *)indexPath{
    return [[KFZDynamicModuleConfig factoryConfig:moduleModel.winddowShowType] moduleItemSizeWithModel:moduleModel IndexPath:indexPath];
}

/**
 item点击方法
 */
+(void)moduleItemClickWithModel:(KFZShopHomeCardsModel *)moduleModel IndexPath:(NSIndexPath *)indexPath{
    [[KFZDynamicModuleConfig factoryConfig:moduleModel.winddowShowType] moduleItemClickWithModel:moduleModel IndexPath:indexPath];
}

/**
 每个模块item的个数
 */
+(NSInteger)moduleItemCountWithModel:(KFZShopHomeCardsModel *)moduleModel{
    return [[KFZDynamicModuleConfig factoryConfig:moduleModel.winddowShowType]moduleItemCountWithModel:moduleModel];
}

#pragma mark - 模块中的各种间距

+(UIEdgeInsets)sectionInsetsWithModel:(KFZShopHomeCardsModel *)moduleModel{
    return [[KFZDynamicModuleConfig factoryConfig:moduleModel.winddowShowType]sectionInsetsWithModel:moduleModel];
}

+(CGFloat)sectionLineSpacingWithModel:(KFZShopHomeCardsModel *)moduleModel{
    return [[KFZDynamicModuleConfig factoryConfig:moduleModel.winddowShowType]sectionLineSpacingWithModel:moduleModel];
}

+(CGFloat)sectionItemSpacingWithModel:(KFZShopHomeCardsModel *)moduleModel{
    return [[KFZDynamicModuleConfig factoryConfig:moduleModel.winddowShowType]sectionItemSpacingWithModel:moduleModel];
}


#pragma mark - 模块下 头试图

+(UICollectionReusableView *)createHeaderViewWithModel:(KFZShopHomeCardsModel *)moduleModel CollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath{
    return [[KFZDynamicModuleConfig headerFactoryConfigWithHeaderStr:moduleModel.sectionHeaderStyleName]createHeaderViewWithModel:moduleModel CollectionView:collectionView IndexPath:indexPath];
}

+(CGSize)moduleIHeaderSizeWithModel:(KFZShopHomeCardsModel *)moduleModel{
    return [[KFZDynamicModuleConfig headerFactoryConfigWithHeaderStr:moduleModel.sectionHeaderStyleName]moduleIHeaderSizeWithModel:moduleModel];
}

/**
 默认透明头试图
 */
+(UICollectionReusableView *)defautCollectionReusableViewCollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath{
    UICollectionReusableView * headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:NSStringFromClass([UICollectionReusableView class]) forIndexPath:indexPath];
    headerView.backgroundColor = [UIColor clearColor];
    return headerView;
}

#pragma mark - 模块下 尾视图 *** 模块之前的间隔 由这里控制

+(UICollectionReusableView *)createFooterViewWithModel:(KFZShopHomeCardsModel *)moduleModel CollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath{
    if (moduleModel.isHaveFooter) {
        KFZShopHomeAreaFooterView * footer = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:NSStringFromClass([KFZShopHomeAreaFooterView class]) forIndexPath:indexPath];
        if ([moduleModel.showMoreType isEqualToString:@"1"]) {
            footer.footerType = KFZShopHomeFooterType_LookMore;
        }else{
            footer.footerType = KFZShopHomeFooterType_FreshList;
        }
        footer.sectionIndex = indexPath.section;
        footer.sectionModel = moduleModel;
        
        __weak typeof(collectionView)wkCollection = collectionView;
        footer.selfBeClick = ^(NSInteger section) {
            [wkCollection reloadSections:[NSIndexSet indexSetWithIndex:section]];
        };
        return footer;
    }
    return [self defautCollectionFooterViewCollectionView:collectionView IndexPath:indexPath];
}

+(CGSize)moduleIFooterSizeWithModel:(KFZShopHomeCardsModel *)moduleModel{
    if (moduleModel.isHaveFooter) {
        KFZShopHomeCardsModel * nextModel  = moduleModel.nextLink;
        if (nil != nextModel && (nextModel.HaveHeaderTitle || nextModel.HaveHeaderScran)) {
            return CGSizeMake(DEF_SCREEN_WIDTH, 70 + 10);
        }
        return CGSizeMake(DEF_SCREEN_WIDTH, 70);
    }else{
        
        KFZShopHomeCardsModel * nextModel = moduleModel.nextLink;
        
        //要判断两个模块之间的距离 所以取值上保证不是最后一个模块
        if (nil != nextModel) {
            
            //如果下一个模块有头试图的话 算是两个模块了 当前模块向下的间隔应该是47
            if (nextModel.HaveHeaderTitle || nextModel.HaveHeaderScran || nextModel.HaveHeaderLabels) {
                return CGSizeMake(DEF_SCREEN_WIDTH, 47);
            }
            
            //如果没有头试图的时候
            
            //判断两个模块是否是一种类型
            if (moduleModel.winddowShowType == nextModel.winddowShowType) {
                return CGSizeMake(DEF_SCREEN_WIDTH, [self sameModuleSpaceHeight:moduleModel.winddowShowType]);
            }
            
            //两种模块不是一种类型
            
            //两种模块不是一种类型   但是两种模块分别是两格(twoCard)和三格(threeCard)
            if ((moduleModel.winddowShowType == CardsType_twoCard || moduleModel.winddowShowType == CardsType_threeCard) && (nextModel.winddowShowType == CardsType_twoCard || nextModel.winddowShowType == CardsType_threeCard)) {
                return CGSizeMake(DEF_SCREEN_WIDTH, 3);
            }
            //两种模块不是一种类型   但是两种模块分别是一个高(OneCard_height)和一格矮(OneCard)
            else if ((moduleModel.winddowShowType == CardsType_OneCard_height || moduleModel.winddowShowType == CardsType_OneCard) && (nextModel.winddowShowType == CardsType_OneCard_height || nextModel.winddowShowType == CardsType_OneCard)) {
                return CGSizeMake(DEF_SCREEN_WIDTH, 3);
            }
            else{
                return CGSizeMake(DEF_SCREEN_WIDTH, 47);
            }
        }
        
        //最后一个模块的逻辑
        
        //如果是猜你喜欢 下面会有一个查看更多的尾试图所以要把间距改为0
        if (moduleModel.winddowShowType == CardsType_GuessYouLike) {
            return CGSizeMake(DEF_SCREEN_WIDTH, 0);;
        }
        
    }
    return CGSizeMake(DEF_SCREEN_WIDTH, 0);
}

/**
 默认透明尾试图
 */
+(UICollectionReusableView *)defautCollectionFooterViewCollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath{
    UICollectionReusableView * headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:NSStringFromClass([UICollectionReusableView class]) forIndexPath:indexPath];
    headerView.backgroundColor = [UIColor clearColor];
    return headerView;
}

/**
 上下两个是同类型时的间距
 */
+(CGFloat)sameModuleSpaceHeight:(CardsType)cardType{
    
    switch (cardType) {
        case CardsType_OneCard_height:{
            return 3;
        }
        case CardsType_OneCard:{
            return 3;
        }
        case CardsType_twoCard:{
            return 3;
        }
        case CardsType_threeCard:{
            return 3;
        }
        case CardsType_preciousBook:{
            return 25;
        }
        case CardsType_goodBook:{
            return 25;
        }
        case CardsType_goodShop:{
            return 15;
        }
        case CardsType_GuessYouLike:{
            return 10;
        }
        case CardsType_BookList:{
            return 47;
        }
        default:
            return 47;
    }
}



#pragma mark - 注册方法

/**
 像当前的collectionView注册cell和头尾试图 --- (一点不好 所有的都要注册现有的全部类型)
 
 @param collectView 当前的collectionView
 */
+(void)registAllClassIdentifirsCollectionView:(UICollectionView *)collectView{
    [collectView registerClass:[KFZShopThreeCardCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZShopThreeCardCell class])];
    [collectView registerClass:[KFZShopTwoCardCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZShopTwoCardCell class])];
    [collectView registerClass:[KFZOneHeightCardCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZOneHeightCardCell class])];
    [collectView registerClass:[KFZOneLowCardCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZOneLowCardCell class])];
    [collectView registerClass:[KFZImageTitlePrise_GoodsCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZImageTitlePrise_GoodsCell class])];
    [collectView registerClass:[KFZImageTitleAuthorPrise_GoodsCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZImageTitleAuthorPrise_GoodsCell class])];
    [collectView registerClass:[KFZShopHomeAreaShopCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZShopHomeAreaShopCell class])];
    [collectView registerClass:[KFZGuessYourLikeCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZGuessYourLikeCell class])];
    [collectView registerClass:[KFZChannelBoolListCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZChannelBoolListCell class])];
    [collectView registerClass:[KFZISBNHorizontalScrollCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZISBNHorizontalScrollCell class])];
    [collectView registerClass:[KFZISBNTableStyleCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZISBNTableStyleCell class])];
    [collectView registerClass:[KFZGoodsHorizontalScrollCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZGoodsHorizontalScrollCell class])];
    [collectView registerClass:[KFZAuctionHorizontalScrollCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZAuctionHorizontalScrollCell class])];
    [collectView registerClass:[KFZGoodsTableStyleCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZGoodsTableStyleCell class])];
    [collectView registerClass:[KFZAuctionSpecialHorizontalScrollCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZAuctionSpecialHorizontalScrollCell class])];
    [collectView registerClass:[KFZAuctionAdvertisementCell class] forCellWithReuseIdentifier:NSStringFromClass([KFZAuctionAdvertisementCell class])];
    
    [collectView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:NSStringFromClass([UICollectionReusableView class])];
    [collectView registerClass:[KFZShopHomeAreaFooterView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:NSStringFromClass([KFZShopHomeAreaFooterView class])];
    [collectView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:NSStringFromClass([UICollectionReusableView class])];
    [collectView registerClass:[KFZOnlyTitleHeaderView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:NSStringFromClass([KFZOnlyTitleHeaderView class])];
    [collectView registerClass:[KFZOnlyScreenHeaderView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:NSStringFromClass([KFZOnlyScreenHeaderView class])];
    [collectView registerClass:[KFZTitleAndScreenHeaderView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:NSStringFromClass([KFZTitleAndScreenHeaderView class])];
    [collectView registerClass:[KFZOnlyLabelsHeaderView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:NSStringFromClass([KFZOnlyLabelsHeaderView class])];
    [collectView registerClass:[KFZTitleAndLabelsHeaderView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:NSStringFromClass([KFZTitleAndLabelsHeaderView class])];
    
}
@end

二，可以看到上面代码KFZDynamicModuleConfig这个算是一个策略选择不过我内部是用映射是生成对应的工厂的。(正常写的话肯定是先写出工厂然后才有这个，不过看代码正好是可以按照这个关联性去看)

@interface KFZDynamicModuleConfig : NSObject

/**
 根据 模块类型枚举的值 来取工厂类

 @return 返回对应的工厂类
 */
+(KFZDynamicModuleCellFactory *)factoryConfig:(CardsType)type;

/**
 根据 模块类型枚举的值 来取工厂类
 
 @return 返回对应的工厂类
 */
+(KFZDynamicModuleHeaderFactory *)headerFactoryConfig:(CardsHeadType)type;

/**
 根据 头试图描述字符串 来取工厂类
 
 @return 返回对应的工厂类
 */
+(KFZDynamicModuleHeaderFactory *)headerFactoryConfigWithHeaderStr:(NSString *)headerStr;


/** 通知-通知频道页面刷新(ps:主要做换一换功能只是在当前页面的一个通知，页面不显示就移除) */
FOUNDATION_EXPORT NSString *const ChannelController_FreshSection;

@end
···
···
#import "KFZDynamicModuleConfig.h"

@implementation KFZDynamicModuleConfig
+(KFZDynamicModuleCellFactory *)factoryConfig:(CardsType)type{
    NSArray * list = @[@"KFZOneCardHeightFactory"
                       ,@"KFZOneCardLowFactory"
                       ,@"KFZTwoCardFactory"
                       ,@"KFZThreeCardFactory"
                       ,@"KFZVerticalBookFactory"
                       ,@"KFZVerticalISBNFactory"
                       ,@"KFZVerticalShopFactory"
                       ,@"KFZGuessYouLikeGoodsFactory"
                       ,@"KFZHorizontalBookListFactory"
                       ,@"KFZISBNHorizontalScrollFactory"
                       ,@"KFZISBNTableStyleFactory"
                       ,@"KFZGoodsHorizontalScrollFactory"
                       ,@"KFZAuctionHorizontalScrollFactory"
                       ,@"KFZGoodsTableStyleFactory"
                       ,@"KFZAuctionSpecialHorizontalScrollFactory"
                       ,@"KFZAuctionAdvertisementFactory"];
    NSString * className = list[type];
    Class class = NSClassFromString(className);
    KFZDynamicModuleCellFactory * factory = [class new];
    return factory;
}

+(KFZDynamicModuleHeaderFactory *)headerFactoryConfig:(CardsHeadType)type{
    NSArray * list = @[@"KFZPureColor_WhiteHeaderFactory"
                       ,@"KFZOnlyTitleHeaderFactory"
                       ,@"KFZOnlyScreenHeaderFactory"
                       ,@"KFZTitleAndScreenHeaderFactory"
                       ,@"KFZOnlyLabelsHeaderFactory"
                       ,@"KFZTitleAndLabelsHeaderFactory"];
    NSString * className = list[type];
    Class class = NSClassFromString(className);
    KFZDynamicModuleHeaderFactory * factory = [class new];
    return factory;
}

+(KFZDynamicModuleHeaderFactory *)headerFactoryConfigWithHeaderStr:(NSString *)headerStr{
    NSDictionary * list = @{@"haveTitlehaveScranhaveLabels":@"KFZTitleAndScreenHeaderFactory",//=
                            @"haveTitlehaveScrannoLabels":@"KFZTitleAndScreenHeaderFactory",
                            @"haveTitlenoScranhaveLabels":@"KFZTitleAndLabelsHeaderFactory",
                            @"haveTitlenoScrannoLabels":@"KFZOnlyTitleHeaderFactory",
                            @"noTitlehaveScranhaveLabels":@"KFZOnlyScreenHeaderFactory",//=
                            @"noTitlehaveScrannoLabels":@"KFZOnlyScreenHeaderFactory",
                            @"noTitlenoScranhaveLabels":@"KFZOnlyLabelsHeaderFactory",
                            @"noTitlenoScrannoLabels":@"KFZPureColor_WhiteHeaderFactory",
                            
                            };
    NSString * className = list[headerStr];
    Class class = NSClassFromString(className);
    KFZDynamicModuleHeaderFactory * factory = [class new];
    return factory;
}

NSString *const ChannelController_FreshSection = @"com.Kongfz.ChannelController_FreshSection";//通知-通知频道页面刷新

@end

这里面的一些枚举，其实就是后端标识的数据类型，我这面转成枚举了。
第三，就是多个工厂的实现了。在KFZDynamicModuleConfig可以看见我返回工厂时的类是KFZDynamicModuleCellFactory这里我是使用基类的方式代替了协议了。
这里我就举个简单的例子吧，就上面一横行两个图片的那种。

@interface KFZTwoCardFactory : KFZDynamicModuleCellFactory
@end

@implementation KFZTwoCardFactory
//----cell
-(UICollectionViewCell *)createCellWithModel:(KFZShopHomeCardsModel *)moduleModel CollectionView:(UICollectionView *)collectionView IndexPath:(NSIndexPath *)indexPath{
    KFZShopTwoCardCell * cell = [collectionView dequeueReusableCellWithReuseIdentifier:NSStringFromClass([KFZShopTwoCardCell class]) forIndexPath:indexPath];
    cell.model = moduleModel;
    return cell;
}
-(NSInteger)moduleItemCountWithModel:(KFZShopHomeCardsModel *)moduleModel{
    return 1;
}
-(void)moduleItemClickWithModel:(KFZShopHomeCardsModel *)moduleModel IndexPath:(NSIndexPath *)indexPath{
    //cellb内部做跳转了
}
-(CGSize)moduleItemSizeWithModel:(KFZShopHomeCardsModel *)moduleModel IndexPath:(NSIndexPath *)indexPath{
    return CGSizeMake(DEF_SCREEN_WIDTH - 30, 66*SHOPHOMEAREA_WIDTH_RATIO);
}

//----sectionLayout section各种间距
-(UIEdgeInsets)sectionInsetsWithModel:(KFZShopHomeCardsModel *)moduleModel{
    return UIEdgeInsetsMake(0, 15, 0, 15);
}
-(CGFloat)sectionLineSpacingWithModel:(KFZShopHomeCardsModel *)moduleModel{
    return 25;
}
-(CGFloat)sectionItemSpacingWithModel:(KFZShopHomeCardsModel *)moduleModel{
    return 15*SHOPHOMEAREA_WIDTH_RATIO;
}
@end

整体结构就这样说完了，其实也不是很复杂是不是。最后附加一个我这里类型的截图：

image.png

打完收工!!!

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