正如@tcaswell所说,您需要强制进行一次
draw()通话begore
background =canvas.copy_from_bbox(ax.bbox)。尝试
...canvas = ax.figure.canvascanvas.draw()background = canvas.copy_from_bbox(ax.bbox) ...

正如@tcaswell所说,您需要强制进行一次
draw()通话begore
background =canvas.copy_from_bbox(ax.bbox)。尝试
...canvas = ax.figure.canvascanvas.draw()background = canvas.copy_from_bbox(ax.bbox) ...