在NSScrollView中，垂直滑块总是指向视图的底部 [英] In NSScrollView the vertical slider always points to bottom of the view

问题描述

我正在开发Mac应用程式。在这个应用程序，我使用NSScrollView的实例作为scrollView。
我在这个ScrollView中设置了一个customView，它是NSView的一个实例：

  [scrollView setDocumentView：customView ];但是，NSScrollView的垂直Slider总是指向视图的底部：
      img src =https://i.stack.imgur.com/n4Ahh.pngalt =enter image description here> 
 
 
 
我想让滑块永远指向自定义视图的顶部：
 
 
 
  
 
 
 
如何进行此更改？ 
 Plz帮助。
解决方案
我已经通过设置ScrollView的ContentView的scrollToPoint属性来解决我的问题。 
下面是代码：
  [[scrollView verticalScroller] setFloatValue：0.0]; 
 [[scrollView contentView] scrollToPoint：NSMakePoint（0.0，y）]; 
 //这里y =（区别b / w scrollView的内容大小高度和scrollView的高度）
  
 
I am developing Mac app. In this app, I am using a NSScrollView's instance as scrollView.
And I have set a customView which is an instance of NSView in this ScrollView as:
[scrollView setDocumentView:customView];
But, the NSScrollView's vertical Slider always points to the bottom of the view as:


I want that the slider always points to the top of the custom View as:



How can I make this change?
Plz help.
解决方案
I have solved my problem by setting the scrollToPoint property of ScrollView's ContentView.
Here is the code:
[[scrollView verticalScroller] setFloatValue:0.0];
[[scrollView contentView] scrollToPoint:NSMakePoint(0.0, y)];
// here y = (difference b/w scrollView's content size height and scrollView's height)


                        
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