1. NSView 不切割sub view 超出部分

superView.layer.masksToBounds = false;

    [_superView1 setWantsLayer:true];
    _superView1.layer.masksToBounds = false;
    _superView1.layer.backgroundColor = NSColor.redColor.CGColor;

    [_subView1 setWantsLayer:true];
    _subView1.layer.backgroundColor = NSColor.blueColor.CGColor;