可可：关闭菜单前的闪烁项目

Question

在OSX上单击菜单项目时，该项目在菜单关闭前闪烁（开 - 关 - 关）。

我问我自己怎么能模仿那种行为？ （我已经重新实现使用NSCollectionView，选择&集团公司在项目，不论工作菜单）

我试过2认为，没有工作：

mouseOver = false; 
[self drawRect:self.bounds]; 
mouseOver = true; 
[self drawRect:self.bounds]; 

[[self window] performSelector:@selector(orderOut:) withObject:nil afterDelay:0.1]; 

和

mouseOver = false; 
[self setNeedsDisplayInRect:self.bounds]; 
[self needsDisplay]; 
mouseOver = true; 
[self setNeedsDisplayInRect:self.bounds]; 
[self needsDisplay]; 

[[self window] performSelector:@selector(orderOut:) withObject:nil afterDelay:0.1]; 

Answer 1

我去为解决方案：

-(void)mouseDown:(NSEvent *)theEvent { 
    [super mouseDown:theEvent]; 

    [self performSelector:@selector(blinkItemOnce:) withObject:[NSNumber numberWithBool:NO] afterDelay:0.0]; 
    [self performSelector:@selector(blinkItemOnce:) withObject:[NSNumber numberWithBool:YES] afterDelay:0.05]; 
    [[self window] performSelector:@selector(orderOut:) withObject:nil afterDelay:0.15]; 
} 

-(void) blinkItemOnce:(NSNumber*) b { 
    mouseOver = [b boolValue]; 
    [self setNeedsDisplayInRect:self.bounds]; 
    [self setNeedsDisplay:YES]; 
}