所以我正在制作井字游戏并且我做到了,当我点击空矩形(瓷砖)时,它会将标签 X 或 O 放在瓷砖上,但是如果瓷砖被标记(不是空的)我想要代码不写任何东西。
这就是这段代码目前的样子:
if (!this.empty ()) {
exit ();
}
问题是,当我按下标有标签的图块时,程序完全停止,单击空图块时我再也看不到 X 或 O。是否有 exit() 的替代方法;那不这样做吗?
这是完整的代码(这段代码实际上不是我写的,它是 KhanAcademy 的做法): https ://www.khanacademy.org/computing/computer-programming/programming-games-visualizations/memory-game/pc/challenge-tic -tac-toe
var playerTurn = 0;
var NUM_COLS = 3;
var NUM_ROWS = 3;
var SYMBOLS =["X","O"];
var tiles = [];
var checkWin = function() {
};
var Tile = function(x, y) {
this.x = x;
this.y = y;
this.size = width/NUM_COLS;
this.label = "";
};
Tile.prototype.draw = function() {
fill(214, 247, 202);
strokeWeight(2);
rect(this.x, this.y, this.size, this.size, 10);
textSize(100);
textAlign(CENTER, CENTER);
fill(0, 0, 0);
text(this.label, this.x+this.size/2, this.y+this.size/2);
};
Tile.prototype.empty = function() {
return this.label === "";
};
Tile.prototype.onClick = function() {
// If the tile is not empty, exit the function
if (!this.empty ()) {
exit();
}
// Put the player's symbol on the tile
this.label = SYMBOLS[playerTurn];
// Change the turn
playerTurn ++;
if (playerTurn >= 1) {
playerTurn = 0;
}
};
Tile.prototype.handleMouseClick = function(x, y) {
// Check for mouse clicks inside the tile
if (x >= this.x && x <= this.x + this.size &&
y >= this.y && y <= this.y + this.size)
{
this.onClick();
}
};
for (var i = 0; i < NUM_COLS; i++) {
for (var j = 0; j < NUM_ROWS; j++) {
tiles.push(new Tile(i * (width/NUM_COLS-1), j * (height/NUM_ROWS-1)));
}
}
var drawTiles = function() {
for (var i in tiles) {
tiles[i].draw();
}
};
mouseReleased = function() {
for (var i in tiles) {
tiles[i].handleMouseClick(mouseX, mouseY);
}
};
draw = function() {
background(143, 143, 143);
drawTiles();
};