NavigationItem.SetRightBarButtonItems 引发异常

发布于 2024-12-15 15:01:43 字数 645 浏览 0 评论 0原文

如果我在导航栏上只设置一个右键，它就可以正常工作。但是，当我尝试设置多个按钮时，它们出现了，但单击它们会引发异常。

EventHandler pickPhotoClickHandler = (s,e) => {}; //Do nothing
var pickPhotoBtn = new UIBarButtonItem(UIBarButtonSystemItem.Camera, pickPhotoClickHandler);

EventHandler sendBtnClickHandler = (s, e) => {}; //Do nothing
var sendBtn = new UIBarButtonItem (UIBarButtonSystemItem.Done, sendBtnClickHandler);

NavigationItem.SetRightBarButtonItem (pickPhotoBtn, animated:true); // This works

var btns = new UIBarButtonItem[]{sendBtn,pickPhotoBtn}; // This doesn't 
NavigationItem.SetRightBarButtonItems(btns,true);       // go very far

我做错了什么？

原文

If I set only one right button on the NavBar it works perfectly.
But when I'm trying to set more than one button, they showed up, but clicking on them throws exceptions.

EventHandler pickPhotoClickHandler = (s,e) => {}; //Do nothing
var pickPhotoBtn = new UIBarButtonItem(UIBarButtonSystemItem.Camera, pickPhotoClickHandler);

EventHandler sendBtnClickHandler = (s, e) => {}; //Do nothing
var sendBtn = new UIBarButtonItem (UIBarButtonSystemItem.Done, sendBtnClickHandler);

NavigationItem.SetRightBarButtonItem (pickPhotoBtn, animated:true); // This works

var btns = new UIBarButtonItem[]{sendBtn,pickPhotoBtn}; // This doesn't 
NavigationItem.SetRightBarButtonItems(btns,true);       // go very far

What am I doing wrong?

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黎歌 2024-12-22 15:01:43

我设法通过创建从 UIbarButtonItem 派生的新类并使用 IntPtr 定义构造函数来解决这个问题

public class UIBarBtn : UIBarButtonItem{
        public UIBarBtn(IntPtr handle):base(handle){}
        public UIBarBtn(UIBarButtonSystemItem si, EventHandler handler):base(si,handler){}
}

，现在它可以工作了

I managed to fix that by creating new class derived from UIbarButtonItem and defining a constructor with IntPtr

public class UIBarBtn : UIBarButtonItem{
        public UIBarBtn(IntPtr handle):base(handle){}
        public UIBarBtn(UIBarButtonSystemItem si, EventHandler handler):base(si,handler){}
}

Now it works

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