c# - 如何在 Xamarin iOS 中创建垂直 ScrollView

Question

我是 ios 开发的新手。我正在尝试在 Xamarin iOS 应用程序中创建垂直 ScrollView 。

下面是我的水平 ScrollView 的代码

using System;

using UIKit;
using Foundation;
using CoreGraphics;
using System.Collections.Generic;

namespace TestApp
{
    public partial class ViewController : UIViewController
    {

    public ViewController (IntPtr handle) : base (handle)
    {
        ScrollingButtonsController ();
    }

    UIScrollView scrollView;
    List<UIButton> buttons;

    public override void ViewDidLoad ()
    {
        base.ViewDidLoad ();
        // Perform any additional setup after loading the view, typically from a nib.
        //MyScrollView.scrollEnabled=YES;
        //MyScrollView.contentSize= CGSizeMake(CGFloat.width, CGFloat.height);          

        //end
        nfloat h = 50.0f;
        nfloat w = 50.0f;
        nfloat padding = 10.0f;
        nint n = 100;

        scrollView = new UIScrollView {
            Frame = new CGRect (0, 100, View.Frame.Height, h + 2 * padding),
            ContentSize = new CGSize ((w + padding) * n, h),
            BackgroundColor = UIColor.Red,
            AutoresizingMask = UIViewAutoresizing.FlexibleWidth
        };

        for (int i=0; i<n; i++) {
            var button = UIButton.FromType (UIButtonType.RoundedRect);
            button.SetTitle (i.ToString (), UIControlState.Normal);
            button.Frame = new CGRect (padding * (i + 1) + (i * w), padding, w, h);
            scrollView.AddSubview (button);
            buttons.Add (button);
        }

        View.AddSubview (scrollView);

        //UIScrollView scrollView;
    //scrollView = new UIScrollView (
    //      new CGRect (0, 0, View.Frame.Width, View.Frame.Height));
    //  View.AddSubview (scrollView);



    }
    public void ScrollingButtonsController ()
    {
        buttons = new List<UIButton> ();

    }

    public override void DidReceiveMemoryWarning ()
    {
        base.DidReceiveMemoryWarning ();
        // Release any cached data, images, etc that aren't in use.
    }


}
}

我想创建一个垂直 ScrollView 并添加一些可滚动的 TextView 。关于如何做到这一点的任何想法？

如果您能详细说明如何使用如下结构方案滚动我的 Main.storyboard 文件中的元素，我将不胜感激:

-Scroll View
--label
---Image View
---Text View
--label
---Image View
---Text View
--label
---Image View
---Text View
--label
---Image View
---Text View
--label
---Image View
---Text View

还有更多...

Answer 1

您需要设置 ScrollView Content Size Height，大于它的框架高度。所以它会向上/向下滚动。 ScrollView 的宽度应与其内容宽度相同，因此它不会向右/向左滚动。