Question

我在Xamarin中创建了一个带有支持类的View，并且想知道我是否可以使用CGRect大小创建该类的实例。我现在有以下代码：

using System;
using CoreGraphics;
using Foundation;
using UIKit;

namespace SimpleScroll.iOS
{
    public partial class ViewController : UIViewController
    {
        public ViewController(IntPtr handle) : base(handle)
        {

        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            // Perform any additional setup after loading the view, typically from a nib.

            // UIScrollView with same width and height as ViewController
            var mainScrollView = new UIScrollView(new CGRect(0, 0, this.View.Frame.Size.Width, this.View.Frame.Size.Height));

            // Enable pagination and set other attributes
            mainScrollView.PagingEnabled = true;
            mainScrollView.ShowsVerticalScrollIndicator = false;
            mainScrollView.ShowsHorizontalScrollIndicator = false;
            mainScrollView.Bounces = false;

            int numberOfViews = 2;
            for (int i = 0; i < numberOfViews; i++)
            {
                nfloat xOrigin = i * this.View.Frame.Size.Width;
                var subView = new UIView(new CGRect(xOrigin, 0, this.View.Frame.Size.Width, this.View.Frame.Size.Height));
                subView.BackgroundColor = UIColor.FromRGBA(0.5f / i, 0.5f, 0.5f, 1);
                mainScrollView.AddSubview(subView);
            }

            mainScrollView.ContentSize = new CGSize(this.View.Frame.Size.Width * numberOfViews, this.View.Frame.Size.Height);
            this.View.AddSubview(mainScrollView);
        }

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

而不是var subView = new UIView(new CGRect(xOrigin, 0, this.View.Frame.Size.Width, this.View.Frame.Size.Height));，我能用自己创建的菜单类做同样的事吗？我怎么能给Menu自己的构造函数，以便我可以做一些事情，var subView = new Menu(new CGRect(...));？

Answer 1

只是将uiview子类化并覆盖框架构造器

[Foundation.Register("Menu")]
public class Menu : UIView
{
  public Menu(CGRect frame) : base(frame)
  {

  }
}

创建自定义大小的视图Xamarin.iOS

1 个答案: