[英]For-Loop not running when called
码:
function SnakeGame() {
"use strict";
/***** Constant & Global Variables ***********************************/
var canvas = $("#canvas")[0];
var ctx = canvas.getContext('2d');
var width = $("#canvas").width();
var height = $("#canvas").height();
var snake, food;
function Snake() {
var startLength = 5; // default for starting size of snake
this.body = [];
this.chgStartLength = function(length) {
startLength = length;
};
this.create = function() {
var i;
for(i=0; i>5; i++) {
this.body.push({x:i, y:0});
}
};
}
var paintCanvas = function() {
ctx.fillStyle = 'white';
ctx.fillRect(0, 0, width, height);
ctx.strokeStyle = 'black';
ctx.strokeRect(0, 0, width, height);
};
var paintFrame = function() {
var i, length = snake.body.length;
for(i=0; i<length; i++) {
var cell = snake.body[i];
ctx.fillStyle = 'black';
ctx.fillRect(cell.x*10, cell.y*10, 10, 10);
ctx.strokeStyle = 'white';
ctx.strokeRect(cell.x*10, cell.y*10, 10, 10);
}
};
this.start = function() {
snake = new Snake();
snake.create();
paintCanvas();
paintFrame();
console.log(snake.body); //for testing
};
}
由于某种原因,即使执行了start
之后, snake.body
还是一个空数组。
for(i=0; i>5; i++) {
这个>
正面临着错误的方向,我相信。
for(i = 0; i < 5; i++) {
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