当父不是窗口时,有没有办法获得相对于最内层NSView的坐标？

您无需手动转换为本地坐标系.您可以通过将convertPoint:fromView:消息发送到视图来将点转换为本地坐标系.发送nil作为参数fromView将从视图的父窗口转换点(无论在哪里).您还可以发送任何其他视图以获取从该空间转换的坐标:

// convert from the window's coordinate system to the local coordinate system
NSPoint clickPoint = [self convertPoint:[theEvent locationInWindow] fromView:nil];

// convert from some other view's cooridinate system
NSPoint otherPoint = [self convertPoint:somePoint fromView:someSuperview];