之前擼k線，k線檢視作為一個子控制元件被放在了ScrollView上，由於k線有個左右滑動的手勢，於是使用了UIPanGestureRecognizer，這導致了在K線上上下滑動時ScrollView沒有任何相應，在互動上不太友好。

因此本內容主要是為了處理UIScrollView的子檢視上新增UIPanGestureRecognizer後，導致上下滑動該子檢視時UIScrollView無法跟隨上下滾動的情況。

實現原理
新建UIPanGestureRecognizer子類
重寫- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

核心程式碼

@implementation IXPanGestureRecognizer

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    [super touchesBegan:touches withEvent:event];

    if (_autoLock) {
        _direction = IXPanDirectionAny;
        _beginP = [[touches anyObject] locationInView:self
 
.view];
    }
}

- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    [super touchesMoved:touches withEvent:event];

    if (!_autoLock && _direction != IXPanDirectionAny) return;

    CGPoint nowPoint = [[touches anyObject] locationInView:self.view];
    if
 
 (_direction == IXPanDirectionAny) {
        if (fabs(nowPoint.x - _beginP.x) > fabs(nowPoint.y - _beginP.y)) {
            _direction = IXPanDirectionHor;
        } else {
            _direction = IXPanDirectionVer;
            self.state = UIGestureRecognizerStateFailed;
        }
    }
}

@end

如有疑問可檢視demo