Question

当点击OSX上的菜单项时，该项目在菜单关闭前闪烁一次（开 - 关 - 关闭）。

我问自己，我怎么能模仿这种行为？（我使用NSCollectionView重新实现了一个菜单，选项和clic对项目都有效）

我试过2认为不起作用：

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

我选择了那个解决方案：

-(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];
}

Cocoa：关闭菜单前闪烁项目

1 个答案: