我正在为我的游戏创建一个关卡选择屏幕,我发现出现以下错误。 未捕获的类型错误:无法读取未定义的属性“Tween”,该错误来自脚本底部的“arrowClicked”函数中的一行。
UshanGame.Selection = function(game){};
var thumbRows = 2;
var thumbCols = 3;
var thumbWidth = 128;
var thumbHeight = 128;
var thumbSpacing = 3;
var levelThumbsGroup;
var currentPage = 0;
var leftArrow;
var rightArrow;
var pages;
UshanGame.Selection.prototype = {
create: function(){
console.log("%c ✔✔ Level Selection Ready! ✔✔", "color:red;");
// array with finished levels and stars collected.
var starsArray = [1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2];
// how many pages are needed to show all levels?
pages = starsArray.length /(thumbRows * thumbCols);
leftArrow = this.add.button(50, 420, "level_arrows", this.arrowClicked);
leftArrow.anchor.setTo(0.5);
leftArrow.frame = 0;
leftArrow.alpha = 0.3;
rightArrow = this.add.button(270, 420, "level_arrows", this.arrowClicked);
rightArrow.anchor.setTo(0.5);
rightArrow.frame = 1;
// creation of the thumbails group
levelThumbsGroup = this.add.group();
// determining level thumbnails width and height for each page
var levelLength = thumbWidth * thumbCols + thumbSpacing * (thumbCols - 1);
var levelHeight = thumbWidth * thumbRows + thumbSpacing * (thumbRows - 1);
// looping through each page
for(var l = 0; l < pages; l++){
// horizontal offset to have level thumbnails horizontally centered in the page
var offsetX = (this.width-levelLength)/ 2 + game.width * l;
// I am not interested in having level thumbnails vertically centered in the page, but
// if you are, simple replace my "20" with
// (game.height-levelHeight)/2
var offsetY = 20;
// looping through each level thumbnails
for(var i = 0; i < thumbRows; i ++){
for(var j = 0; j < thumbCols; j ++){
var levelNumber = i * thumbCols + j + l *(thumbRows * thumbCols);
var levelThumb = this.add.button(offsetX + j * (thumbWidth + thumbSpacing), offsetY + i * (thumbHeight + thumbSpacing), "levels", this.thumbClicked, this);
levelThumb.frame=starsArray[levelNumber];
levelThumb.levelNumber = levelNumber + 1;
levelThumbsGroup.add(levelThumb);
// if the level is playable, also write level number
if(starsArray[levelNumber] < 4){
var style = {
font: "18px Arial",
fill: "#ffffff"
};
var levelText = this.add.text(levelThumb.x + 5, levelThumb.y + 5, levelNumber + 1,style);
levelText.setShadow(2, 2, 'rgba(0,0,0,0.5)', 1);
levelThumbsGroup.add(levelText);
}
}
}
}
},
arrowClicked: function(button){
if(button.frame == 1 && currentPage < pages - 1){
leftArrow.alpha = 1;
currentPage++;
if(currentPage == pages - 1){
button.alpha = 0.3;
}
var buttonsTween = game.add.tween(levelThumbsGroup);
buttonsTween.to({
x: currentPage * game.width * -1
}, 500, Phaser.Easing.Cubic.None);
buttonsTween.start();
}
if(button.frame==0 && currentPage>0){
rightArrow.alpha = 1;
currentPage--;
if(currentPage == 0){
button.alpha = 0.3;
}
var buttonsTween = game.add.tween(levelThumbsGroup);
buttonsTween.to({
x: currentPage * game.width * -1
}, 400, Phaser.Easing.Cubic.None);
buttonsTween.start();
}
}
};
最佳答案
尝试使用
this.add.tween
代替
game.add.tween
关于javascript - 未捕获的类型错误 : Cannot read property 'Tween' of undefined Phaser. io,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27782302/