setFillStyle方法在小米手机上设置颜色无效
const ctx = wx.createCanvasContext(‘myCanvas’);
ctx.setFillStyle(‘white’)
ctx.fillRect(0, 0, backwidth, backheight)
ctx.draw()

const ctx = wx.createCanvasContext(‘myCanvas’);
ctx.setFillStyle(‘white’)
ctx.fillRect(0, 0, backwidth, backheight)
ctx.draw()
