MacOS 开发（六）：NSTableView纯代码实现

因为系统机制导致，纯代码实现滚动视图的时候必须自己实现 scrollView，随封装如下：

3201585809938_.pic.jpg

🌰🌰：
- (void)viewDidLoad {
    [super viewDidLoad];

    [self.view addSubview:self.tableView.enclosingScrollView];
}

- (void)viewDidLayout{
    [super viewDidLayout];

    [self.tableView.enclosingScrollView makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.view);
        make.left.equalTo(self.view);
        make.width.equalTo(self.view).multipliedBy(0.5);
        make.bottom.equalTo(self.view).offset(0);
    }];
  //备注：enclosingScrollView 和 scrollView 是同一对象
}


-(NNTableView *)tableView{
    if (!_tableView) {
        _tableView = ({
            NNTableView *view = [NNTableView create:CGRectZero];
            view.headerView = nil;
            view.selectionHighlightStyle = NSTableViewSelectionHighlightStyleNone;//行高亮的风格
//            view.columnAutoresizingStyle = NSTableViewUniformColumnAutoresizingStyle;

            [view addTableColumnWithTitles:@[@"colume0",]];
            if ([self conformsToProtocol:@protocol(NSTableViewDataSource)]) view.dataSource = self;
            if ([self conformsToProtocol:@protocol(NSTableViewDelegate)]) view.delegate = self;
            view.enclosingScrollView.hasHorizontalScroller = false;
            view.enclosingScrollView.hasVerticalScroller = false;
            view.enclosingScrollView.autohidesScrollers = true;//自动隐藏滚动条（滚动的时候出现）
            
            view;
        });
    }
    return _tableView;
}

视图封装：

class NNTableView: NSTableView {
    
    lazy var scrollView: NSScrollView = {
        let scrollView = NSScrollView()
        scrollView.backgroundColor = NSColor.red
        scrollView.drawsBackground = false
        scrollView.hasHorizontalScroller = true
        scrollView.hasVerticalScroller = true
        scrollView.autohidesScrollers = true
        
        return scrollView
    }()
    
    var adjustsTableColumnsWidth = true
    
    // MARK: -lifecycle    
    override init(frame frameRect: NSRect) {
        super.init(frame: frameRect)
        
        setupUI()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)

        // Drawing code here.
    }
    
    override func layout() {
        super.layout()
        
        if adjustsTableColumnsWidth == true {
            for column in tableColumns {
                column.width = scrollView.bounds.width/CGFloat(tableColumns.count);
            }
        }
    }
    
    // MARK: -funtions
    func setupUI() {
        scrollView.documentView = self
        
    }
    
}

@objc public extension NSTableView {

    static func create(_ rect: CGRect) -> Self {
        let view: NSTableView = self.init(frame: rect);
        view.autoresizingMask = [.width, .height];
//        view.columnAutoresizingStyle = .uniformColumnAutoresizingStyle

        view.gridStyleMask = .solidVerticalGridLineMask
//        view.focusRingType = .none //tableview获得焦点时的风格
        view.selectionHighlightStyle = .regular //行高亮的风格
        view.layer?.backgroundColor = NSColor.background.cgColor
        view.usesAlternatingRowBackgroundColors = false //背景颜色的交替，一行白色，一行灰色。设置后，原来设置的 backgroundColor 就无效了。
//        view.gridColor = NSColor.red
        
        view.appearance = NSAppearance(named: .aqua)
//        view.headerView = nil;

        view.rowHeight = 70;

        return view as! Self;
    }
    
    /// 添加一组表头
    func addTableColumn(titles: [String]) {
      for e in titles {
          let column = NSTableColumn.create(identifier: e, title: e)
          self.addTableColumn(column)
      }
    }
    
}

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