Android遊戲：從一組圖像一次拖拽一個圖像到屏幕

我有5個圖像堆積在屏幕的底部。我的遊戲的目標是拖動這些圖像，並將它們連接在一定條件下（排序拼圖）我用下面的代碼Android遊戲：從一組圖像一次拖拽一個圖像到屏幕

var touchListener = new CCEventListenerTouchAllAtOnce(); 
touchListener.OnTouchesEnded = OnTouchesEnded; 
touchListener.OnTouchesMoved = HandleTouchesMoved; 
AddEventListener (touchListener, this); 
void HandleTouchesMoved (List touches, CCEvent touchEvent) 
{ 
    foreach(var tap in touches) 
    { 
     var locationOnScreen = tap.Location; 
     alarmicSprite.PositionY = locationOnScreen.Y; 
     alarmicSprite.PositionX = locationOnScreen.X; 
     pressSwitchSprite.PositionY = locationOnScreen.Y; 
     pressSwitchSprite.PositionX = locationOnScreen.X; 
    } 
}

該代碼同時將所有圖像到觸摸的座標。我的要求是一次只能拖動一個圖像，而不是一次拖動一次。我腦海中Xamarin和Github給出的Cocossharp API和教程並不是那麼有用。有沒有一種方法可以在一個觸摸實例上拖動一個圖像？幫助讚賞

來源

2015-10-16 Binoy

當你說「堆疊」，是否意味着你有精神上的另一個？ – jaybers

這裏是一個例子，它創建兩個精靈並讓你單獨拖動它們。

設計：

您需要檢測哪個精靈被觸摸，然後只能移動精靈。
拯救精靈被觸摸的OnTouchesBegan
將當前的觸摸精靈在OnTouchesMoved

注意：

的OnTouchesBegan爲EVERY精靈，其登記爲被調用一次事件。因此，如果20個精靈添加偵聽器，則OnTouchesBegan事件被調用20次（除非被吞噬，見下）
以編程方式確定觸摸位置是否在調用OnTouchesBegan的精靈的邊界框內。然而，「吞嚥」觸摸將停止任何剩餘的排隊等待呼叫。要吞嚥，只需返回true。

一旦找到感興趣的精靈，您將返回true以「吞下」觸摸事件，並停止其他精靈回撥。這可以節省CPU並更快地執行您的OnTouchesMoved。在完全處理OnTouchesBegan之前，系統不會調用OnTouchesMoved。

CCSprite currentSpriteTouched; 
CCSprite Sprite1; 
CCSprite Sprite2; 
protected override void AddedToScene() 
{ 
    base.AddedToScene(); 

    // Use the bounds to layout the positioning of our drawable assets 
    CCRect bounds = VisibleBoundsWorldspace; 

    Sprite1 = new CCSprite("redball.png"); 
    Sprite2 = new CCSprite("blueball.png"); 

    Sprite1.Position = bounds.Center; 
    Sprite2.Position = bounds.Center; 
    AddChild(Sprite1); 
    AddChild(Sprite2); 

    // Register for touch events 
    var touchListener = new CCEventListenerTouchOneByOne(); 
    touchListener.IsSwallowTouches = true; 
    touchListener.OnTouchBegan = this.OnTouchesBegan; 
    touchListener.OnTouchMoved = this.OnTouchesMoved; 

    AddEventListener(touchListener, Sprite2); 
    AddEventListener(touchListener.Copy(), Sprite1); 

} 


void OnTouchesMoved(CCTouch touch, CCEvent touchEvent) 
{ 
    if (currentSpriteTouched != null) 
    { 
     currentSpriteTouched.Position = touch.Location; 
    } 
} 

bool OnTouchesBegan(CCTouch touch, CCEvent touchEvent) 
{ 
    // This is called once for each sprite 
    // To stop the remaining sprites from calling, 
    // "swallow" the touch by returning true 
    CCSprite caller = touchEvent.CurrentTarget as CCSprite; 
    currentSpriteTouched = null; 
    if (caller == Sprite1) 
    { 
     if (Sprite1.BoundingBoxTransformedToWorld.ContainsPoint(touch.Location)) 
     { 
      System.Diagnostics.Debug.WriteLine("Sprite 1 touched "); 
      currentSpriteTouched = Sprite1; 
      return true; // swallow  
     } 
     else 
     { 
      return false; // do not swallow and try the next caller 
     } 

    } 
    else if (caller == Sprite2) 
    { 
     if (Sprite2.BoundingBoxTransformedToWorld.ContainsPoint(touch.Location)) 
     { 
      currentSpriteTouched = Sprite2; 
      System.Diagnostics.Debug.WriteLine("Sprite 2 touched "); 
      return true; // swallow  
     } 
     else 
     { 
      return false; // do not swallow and try the next caller 
     } 
    } 
    else 
    { 
     // something else touched 
     System.Diagnostics.Debug.WriteLine("Something else was touched"); 
     return false; // Do not swallow 
    } 
}

來源

2015-10-19 05:36:04 jaybers

我跟着這個鏈接TouchableSpriteTest並取得我需要的功能（從jaybers幫助）

示例代碼

protected override void AddedToScene() 
     { 
      -------------------------- 
      -------------------------- 
      // Register for touch events 
     var touchListener = new CCEventListenerTouchOneByOne(); 
     touchListener.IsSwallowTouches = true; 
     touchListener.OnTouchBegan = OnTouchBegan; 
     touchListener.OnTouchEnded = OnTouchesEnded;    
     touchListener.OnTouchMoved = HandleTouchesMoved; 
     batterySprite.AddEventListener (touchListener); 
     pressSwitchSprite.AddEventListener (touchListener.Copy()); 
     wireSprite3.AddEventListener (touchListener.Copy()); 
     lampSprite.AddEventListener (touchListener.Copy()); 
     wireSprite2.AddEventListener (touchListener.Copy()); 
     } 

     bool OnTouchBegan (CCTouch touch, CCEvent touchEvent) 
     {  
      var target = (CCSprite)touchEvent.CurrentTarget; 

      var locationInNode = touch.Location; 
      var s = target.ContentSize; 
      CCRect rect = target.BoundingBoxTransformedToWorld; 

      if (rect.ContainsPoint (locationInNode)) {    
       target.Opacity = 180; 
       return true; 
      } 
      return false; 
     } 

     void HandleTouchesMoved (CCTouch touch, CCEvent touchEvent) 
     {  

      var target = (CCSprite)touchEvent.CurrentTarget; 
      CCPoint pt = touch.PreviousLocation + touch.Delta; 
      target.Position = target.WorldToParentspace (pt); 
     }

來源

2015-10-19 06:21:08 Binoy

Android遊戲：從一組圖像一次拖拽一個圖像到屏幕

回答

相關問題