對tableView的封裝（OC）

PYTableMainView

因爲開發中常常須要修改tableView的組（cell）的順序，或者控制組（cell）的顯示與隱藏，

尷尬的是判斷順序的邏輯每次都至少要在如下地方修改

/// 獲得 cell、header、footer
- (nullable __kindof UITableViewCell *)cellForRowAtIndexPath:(NSIndexPath *)indexPath;
- (nullable UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section;
- (nullable UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section;

/// cell、header、footer 計算高度
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section;
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section;

/// cell 點擊事件
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath;

複製代碼

代碼及其冗餘，並且不聚合。很差維護

因而封裝了PYTableMainView

PYTableMainView位於PYKit庫中的PYBaseView庫

你能夠這樣引入 pod PYBaseView

demo在這裏

特色

1. 高聚合代碼。

2. 拋棄了組的限制，用類型或者key來區分cell、header、footer

3. 懶加載形式自動緩存每一個cell、header、footer的frame

   1. 若是你發現緩存的frame不許確：

      1. 沒有調用PYTableMainView的reloadData。你能夠調用- (void) reloadIndexPathFrameCatch強制刷新緩存。

      2. 設置了tableView的 預估行高屬性或實現了相應的代理，請設置成0

         estimatedSectionHeaderHeight

         estimatedSectionFooterHeight

         estimatedRowHeight

4. 動態註冊 header、cell、footer

思路

1. 封裝一個結構體SBaseTabelViewData
   1. 其中封裝了header、cell、footer的基本屬性：高度、類型、區分的key（是否爲IXB）
2. 在全部的須要判斷組的地方，建立SBaseTabelViewData，而且調用相應的自定義代理。
3. 在全部的自定義代理實現方法中，都使用header、cell、footer類型/identifire來進行處理。

struct SBaseTabelViewData {
    /// 擴展key
    NSString * key;
    NSInteger sectionCount;
    NSInteger rowCount;
    
    Class rowType;
    Class headerType;
    Class footerType;
    
    NSString *rowIdentifier;
    NSString *headerIdentifier;
    NSString *footerIdentifier;
    
    CGFloat rowHeight;
    CGFloat rowWidth;
    CGFloat headerHeight;
    CGFloat headerWidth;
    CGFloat footerHeight;
    CGFloat footerWidth;
    
    BOOL isXibCell;
    BOOL isXibFooter;
    BOOL isXibHeader;
    /// 若是 (isXibCell && length<= 0) 那麼cellNibName = NSStringFromClass(rowType)
    NSString *cellNibName;
};
typedef struct SBaseTabelViewData  SBaseTabelViewData;
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你能夠實現下面的方法，來建立一個對應IndexPath的SBaseTabelViewData。

- (SBaseTabelViewData) getTableViewData:(PYTableMainView *)baseTableView andCurrentSection:(NSInteger)section andCurrentRow:(NSInteger)row
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全部的關於組的判斷都在這個方法中統一處理。

例子

- (SBaseTabelViewData) getTableViewData:(PYTableMainView *)baseTableView andCurrentSection:(NSInteger)section andCurrentRow:(NSInteger)row {
    
    SBaseTabelViewData data = SBaseTabelViewDataMakeDefault();
    data.sectionCount = 6;
    
    if (section == 0) {
        data.rowCount = self.data1.count;
        data.rowHeight = 60;
        data.rowType = BaseTableTestCell1.class;
        data.rowIdentifier = KBaseTableTestCell1;
    }
    
    if (section == 1) {
        data.rowCount = self.data2.count;
        data.rowHeight = 30;
        data.rowType = BaseTableTestCell2.class;
        data.rowIdentifier = KBaseTableTestCell2;
        data.headerHeight = 40;
        data.headerIdentifier = KBasetableTestHeserFooterView1;
        data.headerType = BasetableTestHeserFooterView1.class;
    }
    
    if (section == 2) {
        data.rowCount = self.data3.count;
        data.rowHeight = 112;
        data.rowType = BaseTableTestCell3.class;
        data.rowIdentifier = KBaseTableTestCell3;
        data.headerHeight = 50;
        data.headerIdentifier = KBasetableTestHeserFooterView2;
        data.headerType = BasetableTestHeserFooterView2.class;
        data.isXibCell = true;
        data.key = KBaseTableTestCell3_data3;///根據key區分是第二組數據
    }
    
    if (section == 3) {
        data.rowCount = self.data4.count;
        data.rowHeight = 120;
        data.rowType = BaseTableTestCell3.class;
        data.rowIdentifier = KBaseTableTestCell3;
        
        data.headerHeight = 60;
        data.headerIdentifier = KBasetableTestHeserFooterView2;
        data.headerType = BasetableTestHeserFooterView2.class;
        data.isXibCell = true;
        data.key = KBaseTableTestCell3_data4;///根據key區分是第三組數據
    }
    return data;
}

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cell數據的傳遞

- (void)baseTableView:(PYTableMainView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath andData:(SBaseTabelViewData)data{
    
    if ([BaseTableTestCell1.class isEqual: cell.class]) {
    }
    
    if ([BaseTableTestCell2.class isEqual: cell.class]) {
        BaseTableTestCell2 *cell2 = (BaseTableTestCell2 *)cell;
        cell2.titleLabel.text = self.data2[indexPath.row];
        cell2.subTitleLabel.text = self.data2[indexPath.row];
        __weak typeof(self)weakSelf = self;
        [cell2 setClickCallBack:^{
            [weakSelf.tableView reloadData];
        }];
    }
    
    if ([BaseTableTestCell3.class isEqual: cell.class]) {
        
        BaseTableTestCell3 *cell3 = (BaseTableTestCell3 *)cell;
        NSString *str = @"";
        
        if ([KBaseTableTestCell3_data3 isEqualToString:data.key]) {
            str = self.data3[indexPath.row];
        }
        
        if ([KBaseTableTestCell3_data4 isEqualToString:data.key]) {
            str = self.data4[indexPath.row];
        }
        
        NSArray <NSString *>*array = [str componentsSeparatedByString:@"<EB>"];
        cell3.nameLabel.text = array.firstObject;
        cell3.subTitleLabel.text = array.lastObject;
        cell3.delegate = self;
        [cell3 addGestureRecognizer: cell3.longPressGesture];
    }
}


- (void)tableView:(PYTableMainView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section andData: (SBaseTabelViewData)data {
    
    if ([BasetableTestHeserFooterView1.class isEqual:view.class]) {
        BasetableTestHeserFooterView1 *header = (BasetableTestHeserFooterView1 *)view;
        header.titleLabel.text = @"設置";
    }
    
    /// 第二種headerView
    if ([BasetableTestHeserFooterView2.class isEqual:view.class]) {
        BasetableTestHeserFooterView2 *header = (BasetableTestHeserFooterView2 *)view;
        
        /// 用key區分header的類型
        if ([data.key isEqualToString:KBaseTableTestCell3_data3]) {
            header.titleLabel.text = @"小的綠蘿";
            header.rightPointView.backgroundColor = UIColor.redColor;
        }
        if ([data.key isEqualToString:KBaseTableTestCell3_data4]) {
            header.titleLabel.text = @"大的鵝鵝鵝掌柴";
            header.rightPointView.backgroundColor = UIColor.blueColor;
        }
    }
}
複製代碼

PYTableMainView位於PYKit庫中的PYBaseView庫

你能夠這樣引入 pod PYBaseView

demo在這裏