Mac Catalyst 中的鼠标滚动

问题描述

我想实现鼠标滚动到我的应用程序。在谷歌搜索之后，基于一些答案和建议，我添加了 UIPanGestureRecognizer。 但不幸的是，我无法捕获任何鼠标滚轮事件。 这是我的代码：

- (void)viewDidLoad
{
     [super viewDidLoad];
     if (@available(iOS 13.4,*)) {
            UIPanGestureRecognizer *mouseWheelRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(mouseWheelGesture:)];
            mouseWheelRecognizer.allowedScrollTypesMask = UIScrollTypeMaskdiscrete;
            mouseWheelRecognizer.allowedTouchTypes = @[ @(UITouchTypeIndirectPointer) ];
            mouseWheelRecognizer.cancelstouchesInView = NO;
            mouseWheelRecognizer.delaystouchesBegan = NO;
            mouseWheelRecognizer.delaystouchesEnded = NO;
            [self.view addGestureRecognizer:mouseWheelRecognizer];
        }
}

-(void)mouseWheelGesture:(UIPanGestureRecognizer *)gesture
{
    NSLog(@"Capturing Mouse Wheel");
    if (gesture.state == UIGestureRecognizerStateBegan ||
        gesture.state == UIGestureRecognizerStateChanged ||
        gesture.state == UIGestureRecognizerStateEnded) {
        CGPoint veLocity = [gesture veLocityInView:self.view];

        if (veLocity.x > 0.0f) {
            veLocity.x = -1.0;
        } else if (veLocity.x < 0.0f) {
            veLocity.x = 1.0f;
        }
        if (veLocity.y > 0.0f) {
            veLocity.y = -1.0;
        } else if (veLocity.y < 0.0f) {
            veLocity.y = 1.0f;
        }
        if (veLocity.x != 0.0f || veLocity.y != 0.0f) {
            NSLog(@"Do scrolling");
        }
    }
}

我错过了什么吗？ 或者也许还有另一种实现鼠标滚动的方法？

谢谢。

解决方法

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