在运行时更改 messageTimer.Interval 即使 messageTimer 在另一个方法中

问题描述

我想在运行时更改调度程序时间的间隔这是我的代码：

InitializeComponent();
        dispatcherTimer messageTimer = new dispatcherTimer();
        messageTimer.Tick += new EventHandler(messageTimer_Tick);
        messageTimer.Interval =  TimeSpan.FromSeconds(1);
        messageTimer.Start();

idk如何在运行时改变dispatcherTimer的时间间隔

解决方法

我创建了两个文本块和一个按钮。

文本块：x:Name="txt_Count"
文本块：x:Name="txt_TimeNow"

按钮：x:Name="btn_changeTime_s"

import random
import pygame

# --- constants --- (UPPER_CASE_NAMES)

GREEN1 = (0,255,0)  # Healthy cells
RED = (255,0)  # Infected cells
GREEN2 = (0,100,0)  # Healthy cells not susecptible
BLACK = (0,0)  # Dead cells
WHITE = (255,255)

BACKGROUND_COLOR = (225,198,153)

SCREEN_SIZE = (800,800)

# --- classes --- (CamelCaseNames)

# class keeep only one cell so it should has name `Cell` instead of `Cells`

class Cell(pygame.sprite.Sprite):

    def __init__(self,color,speed,width,height):
        super().__init__()
        
        self.color = color
        self.speed = speed
        
        self.image = pygame.Surface([width,height])
        self.image.fill(WHITE)
        self.image.set_colorkey(WHITE)
        
        self.radius = width//2 # 25 
        center = [width//2,height//2]
        pygame.draw.circle(self.image,self.color,center,self.radius,width=0)

        self.rect = self.image.get_rect()
        self.rect.x = random.randint(0,400)
        self.rect.y = random.randint(50,700)

    def update(self):
        self.rect.x += random.randint(-10,10)
        self.rect.y += random.randint(-10,10)

# --- functions --- (lower_case_names)

# empty

# --- main --- (lower_case_names)

pygame.init()

screen = pygame.display.set_mode(SCREEN_SIZE)
pygame.display.set_caption("Covid-19 Simualtion")

speed = [0.5,-0.5]

# - objects - 

all_cells = pygame.sprite.Group()  # PEP8: lower_case_name

for _ in range(5):
    cell = Cell(GREEN1,5,50,50)     # PEP8: lower_case_name
    all_cells.add(cell)

# - loop -

clock = pygame.time.Clock()

end = False   
while not end:

    # - events -
    
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            end = True

    # - upadates (without draws) -
    
    all_cells.update()

    # - draws (without updates) -
        
    screen.fill(BACKGROUND_COLOR)
    pygame.draw.rect(screen,BLACK,(0,400,700),3)
    
    all_cells.draw(screen)

    pygame.display.flip()
    clock.tick(30)  # to use less CPU

# - end

pygame.quit()  # some system may need it to close window

如果需要在后台修改Main UI Thread，使用语法

     int count = 0;
     DispatcherTimer messageTimer;
     DispatcherTimer TimeNow;
     public MainWindow()
     {
         InitializeComponent();

         messageTimer = new DispatcherTimer();
         messageTimer.Tick += new EventHandler(messageTimer_Tick);
         messageTimer.Interval = TimeSpan.FromSeconds(1);
         messageTimer.Start();

         TimeNow = new DispatcherTimer();
         TimeNow.Tick += new EventHandler(TimeNow_Tick);
         TimeNow.Interval = TimeSpan.FromMilliseconds(100);
         TimeNow.Start();
     }

     private void TimeNow_Tick(object sender,EventArgs e)
     {
         txt_now.Text = DateTime.Now.ToString();
     }

     private void messageTimer_Tick(object sender,EventArgs e)
     {
         txt_Count.Text = count.ToString();
         count++;
     }

     private void btn_changeTime_s_Click(object sender,RoutedEventArgs e)
     {
         messageTimer.Interval = TimeSpan.FromSeconds(2);
     }

c#c#dispatchertimer wpf wpf