macOS-鼠标

鼠标跟踪

如果直接重写
-(void)mouseMoved:(NSEvent *)event
-(void)mouseExited:(NSEvent *)event
-(void)mouseEntered:(NSEvent *)event
鼠标经过时是不会触发的，需要给NSView添加一个NSTrackingArea

-(void)awakeFromNib
{
    [self addTrackingArea];
}
-(void)mouseMoved:(NSEvent *)event
{
    NSLog(@"-- mouseMoved ");
}
-(void)mouseExited:(NSEvent *)event
{
    NSLog(@"-- mouseExited ");
}
-(void)mouseEntered:(NSEvent *)event
{
    NSLog(@"-- mouseEntered ");
}

-(void)addTrackingArea
{
    NSTrackingArea *are = [[NSTrackingArea alloc] initWithRect:self.bounds options:NSTrackingMouseEnteredAndExited | NSTrackingMouseMoved | NSTrackingActiveInKeyWindow owner:self userInfo:nil];
    [self addTrackingArea:are];
}

• TrackingActive 参数必须加上 ， 否则报错：
  Failed to set (contentViewController) user defined inspected property on (NSWindow): trackingArea options 0x3 do not specify when the tracking area is active
  本例中参数添加的是NSTrackingActiveInKeyWindow

鼠标样式

当鼠标经过TestSubView的（0，0，40，40）区域是会改变状态