macOS 设置鼠标放在控件上是否有小手

1.在@interface的位置添加

/// 当鼠标移动到控件时，是否显示"小手"
@property (assign, nonatomic) BOOL isHandCursor;

2.完成方法

-(void)mouseEntered:(NSEvent *)theEvent{
    if (_isHandCursor == NO) return;
    [[NSCursor pointingHandCursor] set];
}

-(void)mouseExited:(NSEvent *)theEvent{
    if (_isHandCursor == NO) return;
    [[NSCursor arrowCursor] set];
}

3.控件调用，用NSbutton举例

- (void)viewDidLoad {
    [super viewDidLoad];

    NSbutton *btn = [[NSbutton alloc] initWithFrame:CGRectMake(10, 10, 100, 60)];
    //选择小手是否出现
    btn.isHandCursor = YES;
   
    [self.view addSubview:btn];
}