38、动画编程：从炸弹游戏到页面过渡

动画编程：从炸弹游戏到页面过渡

1. 炸弹游戏开发

1.1 炸弹投放机制

在炸弹游戏中，使用 DispatcherTimer 来定时投放炸弹。 DispatcherTimer 能很好地与用户界面配合，因为它在用户界面线程上触发事件，避免了多线程编程中的一些复杂操作。

以下是相关代码：

Private bombTimer As New DispatcherTimer()

Public Sub New()
    InitializeComponent()
    AddHandler bombTimer.Tick, AddressOf bombTimer_Tick
End Sub

' 初始参数设置
Private droppedCount As Integer = 0
Private savedCount As Integer = 0
Private initialSecondsBetweenBombs As Double = 1.3
Private initialSecondsToFall As Double = 3.5
Private secondsBetweenBombs As Double
Private secondsToFall As Double

Private Sub cmdStart_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
    cmdStart.IsEnabled = False
    droppedCount = 0
    savedCo