iOS ISGL3D 手勢識別互斥：實現 gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer 返回 NO

需求：同一時間只識別一種手勢（如捏合或平移，二擇一）。實現 UIGestureRecognizerDelegate 方法，根據視圖判斷是否允許同時識別。

代碼實現

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer 
shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    // 若兩手勢不在同一視圖上，禁止同時識別
    if (gestureRecognizer.view != otherGestureRecognizer.view) {
        return NO;
    }
    // 同一視圖上可根據手勢類型進一步限制
    return YES; // 或根據具體需求返回 NO
}

進階：針對特定手勢類別互斥

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer 
shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    // 針對 UIPinchGestureRecognizer 和 UIPanGestureRecognizer 互斥
    Class pinchClass = [UIPinchGestureRecognizer class];
    Class panClass = [UIPanGestureRecognizer class];
    
    BOOL isPinch = [gestureRecognizer isKindOfClass:pinchClass] || [otherGestureRecognizer isKindOfClass:pinchClass];
    BOOL isPan = [gestureRecognizer isKindOfClass:panClass] || [otherGestureRecognizer isKindOfClass:panClass];
    
    if (isPinch && isPan) return NO; // 捏合與平移互斥
    return YES;
}

設置 Delegate

pinchGestureRecognizer.delegate = self;
panGestureRecognizer.delegate = self;
// self 需符合 UIGestureRecognizerDelegate 協議

Delegate 方法精細控制手勢識別並發邏輯，滿足互斥需求。