objective-c - NSView を見つけて非表示にする方法は?

Question

view1.hファイル

@property(nonatomic,strong) NSView  *aboutView;

NSView を作成したview1.mファイルで

aboutView = [[NSView alloc]initWithFrame:NSMakeRect(6, 6, width -12, height -29)];
[aboutView setHidden:YES];
[view addSubview:aboutView];


NSImageView *imgl=[[NSImageView alloc]initWithFrame:NSMakeRect(0, 0, width -12, height -29)];
[imgl setImageAlignment:NSImageAlignBottomLeft];
[imgl setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
[imgl setImageScaling:NSImageScaleAxesIndependently];
[imgl setImage:[NSImage imageNamed:@"yuan"]];
[aboutView addSubview:imgl];

ButtonController.mのNSView NSViewを見つけて非表示にする方法は?

-(void)mouseUp:(NSEvent *)theEvent{
    NSView *aboutView = [(view1 *)self.superview.window aboutView];
    [aboutView setHidden:NO];
}