放大MonoTouch的一个UIScrollView

问题描述

我想使用MonoTouch的一个UIScrollView实现缩放功能，但我似乎无法使它发挥作用。

我已经看了几其中谈论设置一个委托，但大部分是在OBJ - C的教程，我不能转换到C＃。

基本上，我有在Interface Builder一个UIScrollView有一个的UIImageView作为子视图。

我已经设置的UIScrollView的ContentSize为图像的完整大小，并还设置了最小/最大变焦倍数。这里是我的代码：

 的UIImage imgMap =新的UIImage（IMG / map.png）; 
 ivMap.Image = imgMap; 
 svMap.MinimumZoomScale = 1.0F; 
 svMap.MaximumZoomScale = 3.0F; 
 svMap.ContentSize =新System.Drawing.SizeF（ivMap.Frame.Width，ivMap.Frame.Height）; 
  

这是我缺少的是什么我任何想法？

修改

我创建的代码创建一个新的.xib文件通过@Geoff但仍没有运气，只是春联但仍然没有放大图像提供。

 公共覆盖无效viewDidLoad中（） 
 {
 base.ViewDidLoad（）; 
 
 UIScrollView的SV =新的UIScrollView（thisView.Frame）; 
的UIImageView IV =新的UIImageView（UIImage.FromFile（IMG / map.png））; 
 
 sv.AddSubview（IV）; 
 sv.ContentSize = iv.Frame.Size; 
 sv.MinimumZoomScale = 1.0F; 
 sv.MaximumZoomScale = 3.0F; 
 
 vwMineral.AddSubview（SV）; 
} 
  

解决方案

尝试：

  VAR SV =新的UIScrollView（window.Frame）; 
变种IV =新的UIImageView（UIImage.FromFile（pat.jpg））; 
 
 sv.AddSubview（IV）; 
 sv.ContentSize = iv.Frame.Size; 
 sv.MinimumZoomScale = 1.0F; 
 sv.MaximumZoomScale = 3.0F; 
 sv.MultipleTouchEnabled = TRUE; 
 sv.ViewForZoomingInScrollView =委托（滚动视图的UIScrollView）{
返回IV; 
}; 
 
 window.AddSubview（SV）; 
 window.MakeKeyAndVisible（）; 
  

I'm trying to implement zooming functionality using a UIScrollView in MonoTouch but I just can't seem to make it work.

I've looked at a few tutorials which talk about setting a Delegate but most of it is in Obj-C which I can't translate over to C#.

Basically, I have a UIScrollView in Interface Builder that has an UIImageView as a Subview.

I've set the ContentSize of the UIScrollView to be the full size of the image and have also set a min/max zoom scale. Here's my code:

UIImage imgMap = new UIImage("img/map.png");
ivMap.Image = imgMap;
svMap.MinimumZoomScale = 1.0f;
svMap.MaximumZoomScale = 3.0f;
svMap.ContentSize = new System.Drawing.SizeF(ivMap.Frame.Width, ivMap.Frame.Height);

Any ideas on what I'm missing?

EDIT

I've created a new .xib file with the code provided by @Geoff but still no luck, the image just scrolls but still doesn't zoom.

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

    UIScrollView sv = new UIScrollView (thisView.Frame);
    UIImageView iv = new UIImageView(UIImage.FromFile ("img/map.png"));

    sv.AddSubview (iv);
    sv.ContentSize = iv.Frame.Size;
    sv.MinimumZoomScale = 1.0f;
    sv.MaximumZoomScale = 3.0f;

    vwMineral.AddSubview(sv);
}

解决方案

Try:

var sv = new UIScrollView (window.Frame);
var iv = new UIImageView (UIImage.FromFile ("pat.jpg"));

sv.AddSubview (iv);
sv.ContentSize = iv.Frame.Size;
sv.MinimumZoomScale = 1.0f;
sv.MaximumZoomScale = 3.0f;
sv.MultipleTouchEnabled = true;
sv.ViewForZoomingInScrollView = delegate(UIScrollView scrollView) {
    return iv;
};

window.AddSubview (sv);
window.MakeKeyAndVisible ();

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