Question

我在LineChartView内的Charts框架中有一个UIScrollView。可以通过平移来突出显示图表上的值，以查看有关特定数据点的更多详细信息。

这些是我在视图控制器中进行平移的整体行为的目标：

如果用户在视图控制器上平移任何位置，滚动视图应滚动。即使在图表视图中，也可以指明方向是垂直的。
图表应仅在用户水平滚动时突出显示值，并且滚动视图在这种情况下不应作出反应。

目前，滚动视图在完全与图表交互时会忽略滚动，而图表会对垂直平移作出反应，而不应该这样做，所以当我接近解决方案时，它并不完全存在。

这是我目前的实施......

- (void)viewDidLoad {
    [super viewDidLoad];

    NSArray<UIGestureRecognizer *> *gestureRecognizers = self.lineChartView.gestureRecognizers;
    for (UIGestureRecognizer *gestureRecognizer in gestureRecognizers) {
        if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
            gestureRecognizer.delegate = self;
            self.lineChartViewPanGestureRecognizer = (UIPanGestureRecognizer *)gestureRecognizer;
        }
    }

    UIPanGestureRecognizer *lineChartViewPanGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleLineChartViewPanGestureRecognizer:)];
    [self.lineChartView addGestureRecognizer:lineChartViewPanGestureRecognizer];
}

- (void)handleLineChartViewPanGestureRecognizer:(UIPanGestureRecognizer*)sender {
    if (sender.state == UIGestureRecognizerStateEnded) {
        [self.lineChartView highlightValues:NULL];
    }
}

#pragma mark - UIGestureRecognizerDelegate

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    if (gestureRecognizer == self.lineChartViewPanGestureRecognizer && otherGestureRecognizer == self.scrollView.panGestureRecognizer) {
        UIPanGestureRecognizer* panGestureRecognizer = (UIPanGestureRecognizer *)otherGestureRecognizer;
        CGPoint velocity = [panGestureRecognizer velocityInView:self.view];
        return fabs(velocity.y) > fabs(velocity.x);
    }

    return YES;
}

当用户在图表上垂直平移时，任何人都有关于如何保持滚动视图滚动的建议（这应该忽略这样的平移）？

允许在iOS上使用Charts垂直滚动UIScrollView

0 个答案: