iOSのピンチインアウトとパン操作が同時にできない

ピンチイン・アウトしている最中に指を離さずパン操作もしたいのですが、
現状だとピンチイン・アウトをすると一度指を離さないとパン操作になりません(逆も然り)。
これを指を離さずできるようにしたいのですが、何が悪いのでしょうか？

c#
1            // ピンチジェスチャー追加
2            UIPinchGestureRecognizer pinchGesture = new UIPinchGestureRecognizer(Pinch);
3            pinchGesture.Delegate = new GestureDelegate((PaintViewController)viewController, m_BaseImageView);
4            paintCanvasView.AddGestureRecognizer(pinchGesture);
5
6            // パンジェスチャー追加
7            UIPanGestureRecognizer panGesture = new UIPanGestureRecognizer(Pan);
8            panGesture.MinimumNumberOfTouches = 2; // 2本指のみ
9            panGesture.Delegate = new GestureDelegate((PaintViewController)viewController, m_BaseImageView);
10            paintCanvasView.AddGestureRecognizer(panGesture);

c#
1
2        internal void Pan(UIPanGestureRecognizer gestureRecognizer)
3        {
4            // フリーハンドキャンセル
5            m_PaintCanvasView.PaintFreeHandView.CancelTouch();
6
7            // 画像の移動
8            TranslateImage(gestureRecognizer);
9        }
10
11        /// <summary>
12        /// 背景画像の移動
13        /// </summary>
14        /// <param name="gestureRecognizer"></param>
15        internal void TranslateImage(UIPanGestureRecognizer gestureRecognizer)
16        {
17            Debug.WriteLine("TranslateImage1");
18
19            AdjustAnchorPointForGestureRecognizer(gestureRecognizer);
20            var image = gestureRecognizer.View;
21            if (gestureRecognizer.State == UIGestureRecognizerState.Began || gestureRecognizer.State == UIGestureRecognizerState.Changed)
22            {
23                var translation = gestureRecognizer.TranslationInView(this.m_PaintCanvasView);
24                image.Center = new CGPoint(image.Center.X + translation.X, image.Center.Y + translation.Y);
25                // Reset the gesture recognizer's translation to {0, 0} - the next callback will get a delta from the current position.
26                gestureRecognizer.SetTranslation(CGPoint.Empty, image);
27            }
28        }
29
30
31        internal void Pinch(UIPinchGestureRecognizer gestureRecognizer)
32        {
33            // フリーハンドキャンセル
34            m_PaintCanvasView.PaintFreeHandView.CancelTouch();
35
36            // 画像の拡縮
37            ScaleImage(gestureRecognizer);
38        }
39
40        /// <summary>
41        /// 背景画像の拡縮
42        /// </summary>
43        /// <param name="gestureRecognizer"></param>
44        internal void ScaleImage(UIPinchGestureRecognizer gestureRecognizer)
45        {
46            Debug.WriteLine("ScaleImage1");
47            AdjustAnchorPointForGestureRecognizer(gestureRecognizer);
48            if (gestureRecognizer.State == UIGestureRecognizerState.Began || gestureRecognizer.State == UIGestureRecognizerState.Changed)
49            {
50                Debug.WriteLine("ScaleImage2");
51                gestureRecognizer.View.Transform *= CGAffineTransform.MakeScale(gestureRecognizer.Scale, gestureRecognizer.Scale);
52                // Reset the gesture recognizer's scale - the next callback will get a delta from the current scale.
53                gestureRecognizer.Scale = 1;
54            }
55        }
56        // Scale and rotation transforms are applied relative to the layer's anchor point.
57        // This method moves a UIGestureRecognizer's view anchor point between the user's fingers
58        static void AdjustAnchorPointForGestureRecognizer(UIGestureRecognizer gestureRecognizer)
59        {
60            Debug.WriteLine("AdjustAnchorPointForGestureRecognizer1");
61            if (gestureRecognizer.State == UIGestureRecognizerState.Began)
62            {
63                Debug.WriteLine("AdjustAnchorPointForGestureRecognizer2");
64                var image = gestureRecognizer.View;
65                var locationInView = gestureRecognizer.LocationInView(image);
66                var locationInSuperview = gestureRecognizer.LocationInView(image.Superview);
67
68                image.Layer.AnchorPoint = new CGPoint(locationInView.X / image.Bounds.Size.Width, locationInView.Y / image.Bounds.Size.Height);
69                image.Center = locationInSuperview;
70            }
71        }
72        class GestureDelegate : UIGestureRecognizerDelegate
73        {
74            PaintViewController controller;
75            UIImageView uiImageView;
76
77            public GestureDelegate(PaintViewController controller, UIImageView uiImageView)
78            {
79                Debug.WriteLine("GestureDelegate");
80                this.controller = controller;
81                this.uiImageView = uiImageView;
82            }
83
84            public override bool ShouldReceiveTouch(UIGestureRecognizer aRecogniser, UITouch aTouch)
85            {
86                Debug.WriteLine("ShouldReceiveTouch");
87
88                //nint numberOfTouches = aRecogniser.NumberOfTouches;
89                //Debug.WriteLine("numberOfTouches " + numberOfTouches.ToString());
90
91                return true;
92            }
93
94            // Ensure that the pinch, pan and rotate gestures are all recognized simultaneously
95            public override bool ShouldRecognizeSimultaneously(UIGestureRecognizer gestureRecognizer, UIGestureRecognizer otherGestureRecognizer)
96            {
97                Debug.WriteLine("Test1");
98                // if the gesture recognizers's view isn't one of our images don't recognize
99                if (gestureRecognizer.View != uiImageView)
100                    return false;
101
102                Debug.WriteLine("Test2");
103                // if the gesture recognizers views differ, don't recognize
104                if (gestureRecognizer.View != otherGestureRecognizer.View)
105                    return false;
106
107                Debug.WriteLine("Test3");
108                // if either of the gesture recognizers is a long press, don't recognize
109                if (gestureRecognizer is UILongPressGestureRecognizer || otherGestureRecognizer is UILongPressGestureRecognizer)
110                    return false;
111
112                Debug.WriteLine("Test4");
113                return true;
114            }
115        }