可可预定义调整鼠标光标大小? [英] Cocoa predefined resize mouse cursor?

问题描述

预览(例如调整形状大小时)使用的调整大小鼠标光标是否为系统光标?

Is the resize mouse cursor used by Preview (e.g. when resizing shapes) a system cursor?

它不能直接作为 NSCursor 中的方法使用，但看起来预览应用程序包中的光标也没有私有资源..

It's not available directly as a method in NSCursor but then it doesn't look like there's a private resource for the cursor in the Preview app's bundle either..

除了NSCursor 类定义的方法之外，还有更多的系统游标吗?

Are there more system cursors other than the methods defined by the NSCursor class..?

推荐答案

我想你对这些类方法特别感兴趣(Preview.app dissasembly).

I think you are particularly interested in these class methods (Preview.app dissasembly).

+[NSCursor resizeAngle45Cursor]; which calls +[NSCursor _windowResizeNorthEastSouthWestCursor];
+[NSCursor resizeAngle135Cursor]; which calls +[NSCursor _windowResizeNorthWestSouthEastCursor];

根据 AppKit 的反汇编，这些是 NSCursor 的私有方法.

According to disassembly of AppKit these are private methods of NSCursor.

您可以在代码中尝试，例如

You can try it in your code e.g.

 (void)mouseDown:(NSEvent *)theEvent
{
  [[self window] disableCursorRects];

  id cursor = [[NSCursor class] performSelector:@selector(_windowResizeNorthEastSouthWestCursor)];
  [cursor push];
}

还有更多未记录的游标如

There are more undocumented cursors such as

+[NSCursor _helpCursor];
+[NSCursor _zoomInCursor];
+[NSCursor _zoomOutCursor];

还有更多

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