通过NSView或放大来放大和缩小

问题描述

我希望能够做出类似于以下所示的通用访问缩放窗口的内容。我已经创建了一个NSView并使用填充操作创建了一个带有清晰的透明组合的矩形，以查看我的窗口并显示桌面。现在，我想知道是否可以像下面的图片一样在视图中放大和缩小。我以为这可能是IkImageView或我可以应用的东西，但我当时确定它是如何完成的。有谁知道该怎么做或告诉我在文档中可以找到的地方？一些代码会很棒。谢谢！

解决方案

看看苹果公司的示例 CIAnnotation 。在此示例中，图像被放大，但是我认为您可以实现所需的功能。您可以从

I am hoping to be able to make something similar to the universal access zoom window shown below. I have already created an NSView and using a fill operation I made a rect with a clear "see through" composite to see through my window and show the desktop. Now I am wondering if it is possible to zoom in and out inside my view just like the picture below. I was thinking this might be an IkImageView or something I could apply but i wasent sure how it was done. Does anyone know how to do this or show me where I could find this in the docs? Some code would be great. Thanks!

解决方案

Take a look at Apple's example CIAnnotation. In this example is magnifying image but I think You can achieve what You want. You can download sample code from here.

CIAnnotation app example:

References and guides which can help You with this:

Core Image Programming guide
Quartz 2D Programming Guide
NSGraphicsContext Class Reference

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