luyakus / yppcubetable Goto Github PK

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    LGFeedListCellVM *cvm = self.vm.cvms[indexPath.row];
    YPPCubeTableViewCell *cell = [YPPCubeTableViewCell dequeForTableView:tableView withLayout:cvm.layout];
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    [cell bindViewModel:cvm];
    return cell;
}

+ (__kindof YPPCubeTableViewCell *)dequeForTableView:(UITableView *)tableView withLayout:(YPPCubeCellLayout *)layout {
    YPPCubeTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:layout.identifier];
    if (!cell) {
        YPPCubeCellLayout *cacheLayout = nil;
        for (YPPCubeCellLayout *regisitedLayout in tableView.regisitedLayouts) {
            // cube 数量相差超过 2 时, 不重用, 认为重用布局代价过高
            if (regisitedLayout.cubes.count - layout.cubes.count > 2) continue;
            // 内部算法判断是否可以重用
            if (![regisitedLayout coverOtherLayout:layout]) continue;
            cacheLayout = regisitedLayout;
            break;
        }
        // 没有找到可以复用的 cell
        if (!cacheLayout) {
            // 注册新的 cell 类型
            [tableView registerClass:self.class forCellReuseIdentifier:layout.identifier];
            // 保存 layout
            [tableView.regisitedLayouts addObject:layout];
            // 把已有的 layout 排序, 使下次重用时, 找到的 cell 是与创建的 cell 差异最小的
            [tableView.regisitedLayouts sortUsingComparator:^NSComparisonResult(YPPCubeCellLayout *obj1, YPPCubeCellLayout *obj2) {
                return obj1.cubes.count - obj2.cubes.count;
            }];
            cacheLayout = layout;
            NSLog(@"%@", layout.identifier);
        }
        cell = [tableView dequeueReusableCellWithIdentifier:cacheLayout.identifier];
    }
    return cell;
}

@end

@interface LGArticleCube()
@property (nonatomic, strong) UILabel *articleLab;
@property (nonatomic, weak) LGArticleCubeRenderModel *data;

@end

@implementation LGArticleCube
- (void)setupView:(UIView *)view {
    [super setupView:view];
    [view addSubview:self.articleLab];
    [self.articleLab mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(view).offset(16);
        make.right.equalTo(view).offset(-16);
        make.top.equalTo(view).offset(10);
    }];
}

- (void)fillData:(LGArticleCubeRenderModel *)data {
    [super fillData:data];
    self.data = data;
    self.articleLab.attributedText = data.article;
}

- (CGFloat)cubeHeight {
    return self.data.cubeHeight;
}

- (UILabel *)articleLab {
    if (_articleLab) return _articleLab;
    _articleLab = [UILabel new];
    _articleLab.numberOfLines = 0;
    return _articleLab;
}

@end

@implementation LGArticleCubeRenderModel

- (NSString *)targetCube {
    return NSStringFromClass(LGArticleCube.class);
}

+ (instancetype)rendModelForData:(LGFeedItemModel *)data {
    if (data.article.length <= 0) return nil;
    LGArticleCubeRenderModel *rm = [LGArticleCubeRenderModel new];
    NSMutableAttributedString *attr = [[NSMutableAttributedString alloc] initWithString:data.article];
    attr.yy_font = [UIFont systemFontOfSize:14];
    attr.yy_color = UIColor.blackColor;
    YYTextLayout *layout = [YYTextLayout layoutWithContainerSize:CGSizeMake(UIScreen.mainScreen.bounds.size.width - 32, CGFLOAT_MAX) text:attr];
    
    rm.article = attr;
    rm.cubeHeight = layout.textBoundingSize.height + 10;
    return rm;
}

@end

// 图片cube 接收数据, 生成 9 宫格
- (void)fillData:(LGPicCubeRenderModel *)data {
    [super fillData:data];
    self.data = data;
    [self.holder.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
    [data.pics enumerateObjectsUsingBlock:^(NSString * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        NSInteger rowIndex = idx / KColumnCount;
        NSInteger columnIndex = idx % KColumnCount;
        CGRect rect = CGRectMake((KImageWidth + KSpace) * columnIndex, (KImageWidth + KSpace) * rowIndex, KImageWidth, KImageWidth);
        UIImageView *imageView = [[UIImageView alloc] initWithFrame:rect];
        imageView.layer.cornerRadius = 4;
        imageView.layer.masksToBounds = YES;
        imageView.contentMode = UIViewContentModeScaleAspectFill;
        [self.holder addSubview:imageView];
        [imageView yy_setImageWithURL:[NSURL URLWithString:obj] placeholder:nil];
        @weakify(self)
        // 发送点击事件
        [imageView setAction:^{
            @strongify(self)
            YPPCellCubeAction *action = [YPPCellCubeAction new];
            action.from = NSStringFromClass(self.class);
            action.type = @"pickClick";
            action.data = @(idx);
            [self.data.passOut sendNext:action];
        }];
    }];
}

// cellViewModel 中接收
- (void)responseAction:(YPPCellCubeAction *)action {
    NSLog(@"%@-%@-%@", action.from, action.type, action.data);
}