Python 如何在matplotlib中调整暂停动画的坐标范围？

我希望能够在动画正在运行或处于停止状态时更改动画绘图的xlim和ylim。在动画运行时更改它们（使用ax.set_xlim/set_ylim调用）效果良好，但如果使用event_source.stop（）暂停动画，则沿坐标轴绘制的数字保持不变

下面是显示此问题的测试程序。尝试在动画运行时按“-”和“+”键，您将看到蓝色对象已缩放，坐标范围已更新。但是，如果先按空格键暂停动画，然后按“-”或“+”，则仅缩放蓝色对象，但坐标范围保持不变（并且动画作为调用ani的副作用而恢复。_end_redraw（无））

---

应重新绘制整个画布，以确保可观察到对限制的更改。我想一个好的策略应该是1。改变限制，2。绘制画布，3.停止动画，抓取新背景（通过

\u handle\u resize

），4。重新启动动画（通过

\u end\u redraw

）

---

同样，这仅仅是使用闪电的一个问题。所以这个要求应该是问题的一部分。谢谢你，是的，它有效！你又一次帮助了我。我希望有一天我能报答你的好意！：）

import matplotlib.pyplot as plt
import matplotlib.animation as animation
from numpy import sin, cos, pi

def keypress(event):
    global anim_running
    if event.key == ' ':
        ani.event_source.stop() if anim_running else ani.event_source.start()
        anim_running = not anim_running
    elif event.key == '+':
        ax.set_xlim([-4,4])
        ax.set_ylim([-4,4])
        ani._end_redraw(None)
    elif event.key == '-':
        ax.set_xlim([-1,1])
        ax.set_ylim([-1,1])
        ani._handle_resize()
        ani._end_redraw(None)

phi = pi/2

def animate(i):
    global phi
    line.set_data([[0.0, sin(phi)], [0.0, cos(phi)]])
    phi += 0.01
    return line,

fig,ax = plt.subplots(1, 1)
ax.set_xlim([-2,2])
ax.set_ylim([-2,2])
line, = ax.plot([], [], 'o-', lw=2, color='b')
fig.canvas.mpl_connect('key_press_event', keypress)
ani = animation.FuncAnimation(fig, animate, blit=True, interval=0, frames=2000)
anim_running = True
plt.show()

import matplotlib.pyplot as plt
import matplotlib.animation as animation
from numpy import sin, cos, pi

def keypress(event):
    global anim_running
    if event.key == ' ':
        ani.event_source.stop() if anim_running else ani.event_source.start()
        anim_running = not anim_running
    elif event.key == '+':
        ax.set_xlim([-4,4])
        ax.set_ylim([-4,4])
        fig.canvas.draw()
        ani._handle_resize()
        ani._end_redraw(None)
    elif event.key == '-':
        ax.set_xlim([-1,1])
        ax.set_ylim([-1,1])
        fig.canvas.draw()
        ani._handle_resize()
        ani._end_redraw(None)

phi = pi/2

def animate(i):
    global phi
    line.set_data([[0.0, sin(phi)], [0.0, cos(phi)]])
    phi += 0.01
    return line,

fig,ax = plt.subplots(1, 1)
ax.set_xlim([-2,2])
ax.set_ylim([-2,2])
line, = ax.plot([], [], 'o-', lw=2, color='b')
fig.canvas.mpl_connect('key_press_event', keypress)
ani = animation.FuncAnimation(fig, animate, blit=True, interval=2, frames=2000)
anim_running = True
plt.show()