/// <summary>每添加一个圆，就计算一次方向
/// </summary>
public void CalAngleAndconnectTheJumpedCircle()
{
if (CircleSet == null || CircleSet.Count <= 1)
{
return;
}
//取出最后一个对象
PCCircle lastOne = CircleSet.Last();
//倒数第二个
PCCircle lastTwo = CircleSet[CircleSet.Count - 2];
//计算倒数第二个的位置
nfloat last_1_x = lastOne.Center.X;
nfloat last_1_y = lastOne.Center.Y;
nfloat last_2_x = lastTwo.Center.X;
nfloat last_2_y = lastTwo.Center.Y;
// 1.计算角度（反正切函数）
nfloat angle = (nfloat)(Math.Atan2(last_1_y - last_2_y, last_1_x - last_2_x) + Math.PI / 2);
lastTwo.Angle = angle;
// 2.处理跳跃连线
CGPoint center = CenterPointWithPointOne(lastOne.Center, lastTwo.Center);
PCCircle centerCircle = EnumCircleSetToFindWhichSubviewContainTheCenterPoint(center);
if (centerCircle != null)
{
// 把跳过的圆加到数组中，它的位置是倒数第二个
if (!CircleSet.Contains(centerCircle))
{
CircleSet.Insert(CircleSet.Count - 1, centerCircle);
}
}
}
/// <summary> 给一个点，判断这个点是否被圆包含，如果包含就返回当前圆，如果不包含返回的是NULL
///
/// </summary>
/// <param name="point">前点</param>
/// <returns>点所在的圆</returns>
public PCCircle EnumCircleSetToFindWhichSubviewContainTheCenterPoint(CGPoint point)
{
PCCircle centerCircle = null;
foreach (PCCircle circle in Subviews)
{
if (circle.Frame.Contains(point))
{
centerCircle = circle;
}
}
if (centerCircle != null && !CircleSet.Contains(centerCircle))
{
// 这个circle的角度和倒数第二个circle的角度一致
centerCircle.Angle = CircleSet[CircleSet.Count - 2].Angle;
}
return(centerCircle); // 注意：NULL，就是当前点不在圆内
}
public override void TouchesMoved(NSSet touches, UIEvent evt)
{
CurrentPoint = new CGPoint(0, 0);
UITouch touch = (UITouch)touches.AnyObject;
CGPoint point = touch.LocationInView(this);
foreach (PCCircle circle in Subviews)
{
if (circle.Frame.Contains(point))
{
if (!CircleSet.Contains(circle))
{
CircleSet.Add(circle);
// move过程中的连线（包含跳跃连线的处理）
CalAngleAndconnectTheJumpedCircle();
}
}
else
{
CurrentPoint = point;
}
}
foreach (PCCircle circle in CircleSet)
{
circle.State = CircleState.CircleStateSelected;
// 如果是登录或者验证原手势密码，就改为对应的状态 （加上这句没有三角箭头）
//if (Type != CircleViewType.CircleViewTypeSetting)
//{
// circle.State = CircleState.CircleStateLastOneSelected;
//}
}
if (CircleSet.Count > 0)
{
// 数组中最后一个对象的处理
CircleSetLastObjectWithState(CircleState.CircleStateLastOneSelected);
SetNeedsDisplay();
}
}