大鱼换身体颜色出不来

大鱼不能出来？就只有一个尾巴在那边晃动 TypeError: Cannot read property '0' of undefined 语句是mom.js的 ctx1.drawImage(momBodyOra[momBodyCount],-momBodyOra[momBodyCount].width * 0.5,-this.momBodyOra[momBodyCount] * 0.5);

if(data.double == 1){

    ctx1.drawImage(momBodyOra[momBodyCount],-momBodyOra[momBodyCount].width * 0.5,-this.momBodyOra[momBodyCount] * 0.5);

    }else{

    ctx1.drawImage(momBodyBlue[momBodyCount],-momBodyBlue[momBodyCount].width * 0.5,-this.momBodyBlue[momBodyCount] * 0.5);

    }