macOS - mouseExited: isn't called when mouse leaves trackingArea while scrolling_ios macosapp mouseexited有时候监听不到-优快云博客

博客指出给NSView添加trackingArea后，鼠标不动滚动view时mouseExited:不调用的问题，并将给出解决方法，聚焦于信息技术中前端开发相关的视图交互问题。

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在给NSView 添加trackingArea后，鼠标不动，滚动view, mouseExited: 不调用

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

解决方法：

- (void)updateTrackingAreas {
    
    [self removeTrackingArea:_trackingArea];
    _trackingArea = [[NSTrackingArea alloc] initWithRect:self.bounds options:NSTrackingActiveInKeyWindow |NSTrackingMouseMoved | NSTrackingMouseEnteredAndExited owner:self userInfo:nil];
    [self addTrackingArea:_trackingArea];
    
    //mouseExited isn't called when mouse leaves trackingArea while scrolling
    NSPoint mouseLocation = [[self window] mouseLocationOutsideOfEventStream];
    mouseLocation = [self convertPoint: mouseLocation
                              fromView: nil];
    
    if (NSPointInRect(mouseLocation, [self bounds]))
    {
        [self mouseEntered: [NSApp currentEvent]];
    }
    else
    {
        [self mouseExited: [NSApp currentEvent]];
    }
    
    [super updateTrackingAreas];
    
}