## Canvas绘制阴影 ~~~ //阴影的x偏移 ctx.shadowOffsetX = 10; //阴影的y偏移 ctx.shadowOffsetY = 10; //阴影的颜色 ctx.shadowColor = "rgba(0,0,0,0.5)"; //阴影的模糊成都 ctx.shadowBlur = 10; ctx.fillStyle = "rgba(255,0,0,0.5)" ctx.fillText("渡课", 400, 100); ~~~ > 阴影设置之后会对后面所有绘画产生效果 > 解决办法 save、restore