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我在vb.net wpf中遇到问题。 我想在一个工具中做一些捐赠页面的工作,我们在那里可以捐献多种想法。你也应该能够评估捐赠的想法。因此我创建了显示评分的星星。图像正在从顶部切割,因为它们被放置在底部
问题是星星的前2行显示正确。但是第三个从最低处消失。
But seem to get cut off from the top
请参阅我们使用(当然我们这样做只是在我们的空闲时间和代码尝试学习对我们自己的。therefroe请不要介意,这个代码可能不是你所见过的最好的 - 我们只是很高兴,它正在更多或更少):
Imports System.Windows.Forms
Private Sub MetroWindow_Loaded(sender As Object, e As RoutedEventArgs)
Dim OpenDonations As Integer = 3
If OpenDonations <> 0 Then
Try
Dim needed As Double
Dim reached As Double
Dim Währung As String = ""
Dim ratings(0) As String
Dim i As Integer = OpenDonations
Dim y As Double = 10
Dim Z As Integer = 1
Do While 0 < i
'Set needed value from DB
'Set reached value from DB
'Set Währung value from DB
'[...] creating the other objects like label, scrollviewer, textblock, image(on the left), button, progressbar..
'create rating pictures
Dim Leftstar1 As New Image()
Dim rightstar1 As New Image()
Dim Leftstar2 As New Image()
Dim rightstar2 As New Image()
Dim Leftstar3 As New Image()
Dim rightstar3 As New Image()
Dim Leftstar4 As New Image()
Dim rightstar4 As New Image()
Dim Leftstar5 As New Image()
Dim rightstar5 As New Image()
Leftstar1.Name = "StarImageLeft1" + Z.ToString
rightstar1.Name = "StarImageright1" + Z.ToString
Leftstar2.Name = "StarImageLeft2" + Z.ToString
rightstar2.Name = "StarImageright2" + Z.ToString
Leftstar3.Name = "StarImageLeft3" + Z.ToString
rightstar3.Name = "StarImageright3" + Z.ToString
Leftstar4.Name = "StarImageLeft4" + Z.ToString
rightstar4.Name = "StarImageright4" + Z.ToString
Leftstar5.Name = "StarImageLeft5" + Z.ToString
rightstar5.Name = "StarImageright5" + Z.ToString
Dim Bewertung As Double = 'get value from db
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
Leftstar2.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Relative))
rightstar2.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
Leftstar3.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Relative))
rightstar3.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
Leftstar4.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Relative))
rightstar4.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
Leftstar5.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Relative))
rightstar5.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
If Bewertung = 0 Then
ElseIf Bewertung <= 0.5 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
ElseIf Bewertung <= 1 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
ElseIf Bewertung <= 1.5 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar2.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
ElseIf Bewertung <= 2 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar2.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar2.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
ElseIf Bewertung <= 2.5 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar2.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar2.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar3.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
ElseIf Bewertung <= 3 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar2.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar2.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar3.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar3.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
ElseIf Bewertung <= 3.5 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar2.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar2.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar3.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar3.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar4.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
ElseIf Bewertung <= 4 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar2.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar2.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar3.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar3.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar4.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar4.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
ElseIf Bewertung <= 4.5 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar2.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar2.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar3.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar3.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar4.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar4.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar5.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
ElseIf Bewertung <= 5 Then
Leftstar1.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar1.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar2.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar2.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar3.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar3.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar4.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar4.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
Leftstar5.Source = New BitmapImage(New Uri(leftstarsource_full, UriKind.Relative))
rightstar5.Source = New BitmapImage(New Uri(rightstarsource_full, UriKind.Relative))
End If
Leftstar1.HorizontalAlignment = Windows.HorizontalAlignment.Left
Leftstar1.VerticalAlignment = Windows.VerticalAlignment.Top
Leftstar1.Height = 25
Leftstar1.Width = 25
'Leftstar1.Margin = New Thickness(x, y + 110 + Progressbar_reached.Height + 10, 0, 0)
Leftstar1.Margin = New Thickness(x + 200, Z * 125, 0, 0)
rightstar1.HorizontalAlignment = Windows.HorizontalAlignment.Left
rightstar1.VerticalAlignment = Windows.VerticalAlignment.Top
rightstar1.Height = 25
rightstar1.Width = 25
rightstar1.Margin = New Thickness(Leftstar1.Margin.Left + 13, Leftstar1.Margin.Top, 0, 0)
Leftstar2.HorizontalAlignment = Windows.HorizontalAlignment.Left
Leftstar2.VerticalAlignment = Windows.VerticalAlignment.Top
Leftstar2.Height = 25
Leftstar2.Width = 25
Leftstar2.Margin = New Thickness(rightstar1.Margin.Left + 10, Leftstar1.Margin.Top, 0, 0)
rightstar2.HorizontalAlignment = Windows.HorizontalAlignment.Left
rightstar2.VerticalAlignment = Windows.VerticalAlignment.Top
rightstar2.Height = 25
rightstar2.Width = 25
rightstar2.Margin = New Thickness(Leftstar2.Margin.Left + 13, Leftstar1.Margin.Top, 0, 0)
Leftstar3.HorizontalAlignment = Windows.HorizontalAlignment.Left
Leftstar3.VerticalAlignment = Windows.VerticalAlignment.Top
Leftstar3.Height = 25
Leftstar3.Width = 25
Leftstar3.Margin = New Thickness(rightstar2.Margin.Left + 10, Leftstar1.Margin.Top, 0, 0)
rightstar3.HorizontalAlignment = Windows.HorizontalAlignment.Left
rightstar3.VerticalAlignment = Windows.VerticalAlignment.Top
rightstar3.Height = 25
rightstar3.Width = 25
rightstar3.Margin = New Thickness(Leftstar3.Margin.Left + 13, Leftstar1.Margin.Top, 0, 0)
Leftstar4.HorizontalAlignment = Windows.HorizontalAlignment.Left
Leftstar4.VerticalAlignment = Windows.VerticalAlignment.Top
Leftstar4.Height = 25
Leftstar4.Width = 25
Leftstar4.Margin = New Thickness(rightstar3.Margin.Left + 10, Leftstar1.Margin.Top, 0, 0)
rightstar4.HorizontalAlignment = Windows.HorizontalAlignment.Left
rightstar4.VerticalAlignment = Windows.VerticalAlignment.Top
rightstar4.Height = 25
rightstar4.Width = 25
rightstar4.Margin = New Thickness(Leftstar4.Margin.Left + 13, Leftstar1.Margin.Top, 0, 0)
Leftstar5.HorizontalAlignment = Windows.HorizontalAlignment.Left
Leftstar5.VerticalAlignment = Windows.VerticalAlignment.Top
Leftstar5.Height = 25
Leftstar5.Width = 25
Leftstar5.Margin = New Thickness(rightstar4.Margin.Left + 10, Leftstar1.Margin.Top, 0, 0)
rightstar5.HorizontalAlignment = Windows.HorizontalAlignment.Left
rightstar5.VerticalAlignment = Windows.VerticalAlignment.Top
rightstar5.Height = 25
rightstar5.Width = 25
rightstar5.Margin = New Thickness(Leftstar5.Margin.Left + 13, Leftstar1.Margin.Top, 0, 0)
'[...] here is actually some code for mouseover and mouselevave events of the starimages but had to be shortended so everything fits.
Me.GridDonations.Children.Add(Leftstar1)
Me.GridDonations.Children.Add(rightstar1)
Me.GridDonations.Children.Add(Leftstar2)
Me.GridDonations.Children.Add(rightstar2)
Me.GridDonations.Children.Add(Leftstar3)
Me.GridDonations.Children.Add(rightstar3)
Me.GridDonations.Children.Add(Leftstar4)
Me.GridDonations.Children.Add(rightstar4)
Me.GridDonations.Children.Add(Leftstar5)
Me.GridDonations.Children.Add(rightstar5)
y = y + 10 + 100 + 10 + Progressbar_reached.Height + 10 + Leftstar1.Height + 15
i = i - 1
If Z <> 1 Then
Me.Height = Me.Height + Image.Height + 10 + Progressbar_reached.Height + 10 + 10 + Leftstar1.Height + 15
Else
Me.Height = 30 + 10 + Image.Height + 10 + Progressbar_reached.Height + 10 + 10 + Leftstar1.Height + 15
End If
Z += 1
Loop
Catch
End Try
Else
Dim NoDonations_Label As New System.Windows.Controls.Label()
NoDonations_Label.Name = "NoDonationLabel"
NoDonations_Label.Content = "No Donations needed!"
Me.GridDonations.Children.Add(NoDonations_Label)
End If
End Sub
我试图从一开始就做一遍,并想知道星星已经消失的时候,我只加他们..不他们确实如此。 下面是我用这个时间代码:
Imports System.Windows.Forms
Public Class Donations
Dim funktionen As New Methoden
Dim leftstarsource_empty As String = "/LiquidMustard;component/pics/leftstar_empty.png"
Dim rightstarsource_empty As String = "/LiquidMustard;component/pics/rightstar_empty.png"
Dim leftstarsource_full As String = "/LiquidMustard;component/pics/leftstar_full.png"
Dim rightstarsource_full As String = "/LiquidMustard;component/pics/rightstar_full.png"
Private Sub MetroWindow_Loaded(sender As Object, e As RoutedEventArgs)
Dim OpenDonations As Integer = funktionen.getvaluebyquery("Select Count(*) from lm_donations")
'Neues Grid anlegen
Dim DonationGrid As New Grid()
DonationGrid.Name = "DonationGrid"
DonationGrid.VerticalAlignment = Windows.VerticalAlignment.Top
DonationGrid.HorizontalAlignment = Windows.HorizontalAlignment.Left
DonationGrid.Margin = New Thickness(0)
Try
Dim needed As Double
Dim reached As Double
Dim Währung As String = ""
Dim heightvalue As Integer = 10
Dim i As Integer = 1
Do While 0 < OpenDonations
needed = funktionen.getvaluebyquery("Select needed from lm_donations where DonationName = 'Donation" & i & "'")
reached = funktionen.getvaluebyquery("Select reached_confirmed from lm_donations where DonationName = 'Donation" & i & "'")
Währung = funktionen.getvaluebyquery("Select Währung from lm_donations where DonationName = 'Donation" & i & "'")
Dim Starimage_left_1 As New Image()
Dim Starimage_left_2 As New Image()
Dim Starimage_left_3 As New Image()
Dim Starimage_left_4 As New Image()
Dim Starimage_left_5 As New Image()
Dim Starimage_right_1 As New Image()
Dim Starimage_right_2 As New Image()
Dim Starimage_right_3 As New Image()
Dim Starimage_right_4 As New Image()
Dim Starimage_right_5 As New Image()
Starimage_left_1.Name = "Starimage_left_1" & i.ToString
Starimage_left_2.Name = "Starimage_left_2" & i.ToString
Starimage_left_3.Name = "Starimage_left_3" & i.ToString
Starimage_left_4.Name = "Starimage_left_4" & i.ToString
Starimage_left_5.Name = "Starimage_left_5" & i.ToString
Starimage_right_1.Name = "Starimage_right_1" & i.ToString
Starimage_right_2.Name = "Starimage_right_2" & i.ToString
Starimage_right_3.Name = "Starimage_right_3" & i.ToString
Starimage_right_4.Name = "Starimage_right_4" & i.ToString
Starimage_right_5.Name = "Starimage_right_5" & i.ToString
Starimage_left_1.Margin = New Thickness(10, heightvalue, 0, 0)
Starimage_right_1.Margin = New Thickness(Starimage_left_1.Margin.Left + 13, Starimage_left_1.Margin.Top, 0, 0)
Starimage_left_2.Margin = New Thickness(Starimage_right_1.Margin.Left + 13, Starimage_left_1.Margin.Top, 0, 0)
Starimage_right_2.Margin = New Thickness(Starimage_left_2.Margin.Left + 13, Starimage_left_1.Margin.Top, 0, 0)
Starimage_left_3.Margin = New Thickness(Starimage_right_2.Margin.Left + 13, Starimage_left_1.Margin.Top, 0, 0)
Starimage_right_3.Margin = New Thickness(Starimage_left_3.Margin.Left + 13, Starimage_left_1.Margin.Top, 0, 0)
Starimage_left_4.Margin = New Thickness(Starimage_right_3.Margin.Left + 13, Starimage_left_1.Margin.Top, 0, 0)
Starimage_right_4.Margin = New Thickness(Starimage_left_4.Margin.Left + 13, Starimage_left_1.Margin.Top, 0, 0)
Starimage_left_5.Margin = New Thickness(Starimage_right_4.Margin.Left + 13, Starimage_left_1.Margin.Top, 0, 0)
Starimage_right_5.Margin = New Thickness(Starimage_left_5.Margin.Left + 13, Starimage_left_1.Margin.Top, 0, 0)
Starimage_left_1.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Absolute))
Starimage_right_1.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
Starimage_left_2.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Relative))
Starimage_right_2.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
Starimage_left_3.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Relative))
Starimage_right_3.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
Starimage_left_4.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Relative))
Starimage_right_4.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
Starimage_left_5.Source = New BitmapImage(New Uri(leftstarsource_empty, UriKind.Relative))
Starimage_right_5.Source = New BitmapImage(New Uri(rightstarsource_empty, UriKind.Relative))
Starimage_left_1.Height = 25
Starimage_left_1.Width = 25
Starimage_left_2.Height = 25
Starimage_left_2.Width = 25
Starimage_left_3.Height = 25
Starimage_left_3.Width = 25
Starimage_left_4.Height = 25
Starimage_left_4.Width = 25
Starimage_left_5.Height = 25
Starimage_left_5.Width = 25
Starimage_right_1.Height = 25
Starimage_right_1.Width = 25
Starimage_right_2.Height = 25
Starimage_right_2.Width = 25
Starimage_right_3.Height = 25
Starimage_right_3.Width = 25
Starimage_right_4.Height = 25
Starimage_right_4.Width = 25
Starimage_right_5.Height = 25
Starimage_right_5.Width = 25
Starimage_left_1.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_left_2.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_left_3.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_left_4.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_left_5.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_right_1.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_right_2.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_right_3.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_right_4.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_right_5.HorizontalAlignment = Windows.HorizontalAlignment.Left
Starimage_left_1.VerticalAlignment = Windows.VerticalAlignment.Top
Starimage_left_2.VerticalAlignment = Windows.VerticalAlignment.Top
Starimage_left_3.VerticalAlignment = Windows.VerticalAlignment.Top
Starimage_left_4.VerticalAlignment = Windows.VerticalAlignment.Top
Starimage_left_5.VerticalAlignment = Windows.VerticalAlignment.Top
Starimage_right_1.VerticalAlignment = Windows.VerticalAlignment.Top
Starimage_right_2.VerticalAlignment = Windows.VerticalAlignment.Top
Starimage_right_3.VerticalAlignment = Windows.VerticalAlignment.Top
Starimage_right_4.VerticalAlignment = Windows.VerticalAlignment.Top
Starimage_right_5.VerticalAlignment = Windows.VerticalAlignment.Top
DonationGrid.Children.Add(Starimage_left_1)
DonationGrid.Children.Add(Starimage_left_2)
DonationGrid.Children.Add(Starimage_left_3)
DonationGrid.Children.Add(Starimage_left_4)
DonationGrid.Children.Add(Starimage_left_5)
DonationGrid.Children.Add(Starimage_right_1)
DonationGrid.Children.Add(Starimage_right_2)
DonationGrid.Children.Add(Starimage_right_3)
DonationGrid.Children.Add(Starimage_right_4)
DonationGrid.Children.Add(Starimage_right_5)
Me.Height = Starimage_left_1.Margin.Top + 26 + 25 + 10
DonationGrid.Height = Me.Height + 200
OpenDonations -= 1
i += 1
heightvalue += 205
Loop
Me.AddChild(DonationGrid)
Catch
End Try
End Sub
End Class
这是该窗口的XAML:
<Controls:MetroWindow x:Class="Donations"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
Title="Donations" Icon="/LiquidMustard;component/pics/Mustard.ico" WindowStyle="SingleBorderWindow" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" ResizeMode="NoResize" ShowInTaskbar="False" Height="210.596" Width="510" Loaded="MetroWindow_Loaded">
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colours.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Blue.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.AnimatedTabControl.xaml" />
<ResourceDictionary Source="Liquidstyle.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<Controls:MetroWindow.WindowCommands>
<Controls:WindowCommands/>
</Controls:MetroWindow.WindowCommands>
代码中的“Z”是什么? –
z只是一个从1开始并在循环中计数的整数。 我使用它为我创建的不同对象提供唯一的名称。此外,我用它来确定第一个循环来获得正确的窗口大小。在代码中它也用于边缘 - 这仅仅用于测试星星消失的地方。 –