来自 IB 的原型单元的参考 [英] Reference of prototype cells from IB

问题描述

我正在用 MonoTouch 中的故事板做 iOS 项目.

I am doing iOS project with storyboards in MonoTouch.

我有 UITableView 的自定义类 (myCustomTableFoo) 并在 IB 中指定了此类的原型单元格.然后我想以编程方式实例化这个类.它缺少原型单元格的坏事，我不知道如何将该原型单元格插入到我以编程方式创建的表对象中.

I have the custom class of UITableView (myCustomTableFoo) and specified the prototype cells of this class in IB. Then I want to instance this class programmatically. The bad thing it's lacking the prototype cells, and I don't know how to insert that prototype cells to my programmatically created table object.

我有一个故事板，我想在所有继承的表类中使用来自 IB 的原型单元格.我认为 MonoTouch 在这种情况下可能与 Objective-c 非常相似.

I have a storyboard and I want to use my prototype cells from IB in all my inherited table classes. I think MonoTouch could be pretty similar to Objective-c in this case.

推荐答案

你可以使用

this._tableView.RegisterClassForCellReuse(typeof(MyCell), new NSString("MyReuseIdentifier"));

然后你可以使用

this._tableView.DequeueReusableCell("MyReuseIdentifier");

单元格将被自动实例化.你确实需要使用 [Register("MyCell") 注册你的类，它应该有一个像

the cell would be automatically instantiated. You do need to register your class using [Register("MyCell") and it should have a constructor like

public MyCell(IntPtr handle) : base(handle) {

}

但有一件事，我认为您不能重复使用您在故事板中定义的单元格.如果你想在不同的 TableView 实例中重用相同的单元格，你可以为你的单元格创建一个唯一的 Nib，然后类似的东西就可以了:

One thing though, I don't think you can reuse the cell you defined in your storyboard. If you want to reuse the same cells in different TableView instance, you can create a unique Nib for your cell and then something like that would do the trick:

public partial class MyCell : UITableViewCell {

    private MySuperCellView _mySuperNibView;

    public MyCell (IntPtr handle) : base (handle) {

    }

    private void checkState() {
        // Check if this is the first time the cell is instantiated
        if (this._mySuperNibView == null) {
            // It is, so create its view
            NSArray array = NSBundle.MainBundle.LoadNib("NibFileName", this, null);
            this._mySuperNibView = (MySuperCellView)Runtime.GetNSObject(array.ValueAt(0));
            this._mySuperNibView.Frame = this.Bounds;
            this._mySuperNibView.LayoutSubviews();

            this.AddSubview(this._mySuperNibView);
        }
    }

    public object cellData {
        get { return this._mySuperNibView.cellData; }
        set {
            this.checkState();
            this._mySuperNibView.cellData = value;
        }
    }
}

这里我使用的是在外部 Nib 上定义的通用视图.如果尚未实例化，我在将数据输入 Cell 时手动实例化它.它通常发生在第一次实例化 Cell 时.

Here I'm using a generic view defined on an external Nib. I manually instantiate it when feeding the data into the Cell if it doesn't has been yet instantiated. It happens typically at the first time the Cell was instantiated.

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