按老師的代碼寫完沒效果？？？
var?Window_Width?=?1024;
var?window_Height?=?768;
var?Radius?=?8;
window.onload?=?function(){
var?canvas?=?document.getElementById("canvas");
var?context?=?canvas.getContext("2d");
canvas.width?=?Window_Width;
canvas.height?=?window_Height;
render(context);
}
function?render(){
var?hours?=?12;
var?minutes?=?34;
var?seconds?=?56;
renderDigit(0,0,parseInt(hours/10),cxt);
}
function?renderDigit(x,y,num,cxt){
cxt.fillStyle?=?"blue";
for(var?i=0;i<digit[num].lenght;i++){
for(var?j=0;j<digit[num][i].lenght;j++){
if(digit[num][i]?==?1){
cxt.beginPath();
cxt.art(x+(Radius+1)+2*(Radius+1),y+(Radius+1)+2*(Radius+1),Radius,0,2*Math.PI);
cxt.closePath();
cst.fill();
}
}
}
}為什么我的沒顯示？F12說renderDigit(0,0,parseInt(hours/10),cxt);的cxt有問題
2016-06-13
function?render(cxt){ ?//render函數(shù)頭里面忘寫形參cxt了
????var?hours?=?12;
????var?minutes?=?34;
????var?seconds?=?56;
?
????renderDigit(0,0,parseInt(hours/10),cxt);
}