我目前有一个循环,每秒动画HTML元素,在最后一个动画完成后,我想接受用户输入:
playSequence(currentLevel) {
console.log("playing level " + currentLevel)
for (var q = 0; q < currentLevel; q++) {
(function(q) {
setTimeout(function() {
var active = '#' + sequence[q].toString(); //the div currently being animated
console.log(active);
var currentColor = $(active).css('background-color');
var newColor = currentColor.replace("0.6", "1.0");
$(active).animate({
backgroundColor: newColor
}, 100, function() {}).delay(900).animate({
backgroundColor: currentColor
}, 100, function() {
if (q === (currentLevel - 1)) {
console.log("done"); //this runs
this.getInput(1, currentLevel); //this does not
}
});
}, 1000 * q)
}(q));
}
}
在最后一个动画之后,会打印“done”,但不会调用getInput,因为函数开头的console.log不会打印。
为什么它不会在最后一个计时器完成后运行,即使它上面的console.log呢?
但是,如果我像这样移动getInput,
playSequence(currentLevel) {
console.log("playing level " + currentLevel)
for (var q = 0; q < currentLevel; q++) {
(function(q) {
setTimeout(function() {
var active = '#' + sequence[q].toString(); //the div currently being animated
console.log(active);
var currentColor = $(active).css('background-color');
var newColor = currentColor.replace("0.6", "1.0");
$(active).animate({
backgroundColor: newColor
}, 100, function() {}).delay(900).animate({
backgroundColor: currentColor
}, 100, function() {
if (q === (currentLevel - 1)) {
console.log("done"); //this runs
}
});
}, 1000 * q)
}(q));
}
this.getInput(1, currentLevel); //this runs
}
然后getInput会运行,但它不能正常运行,因为它在动画完成之前运行,因为它在timeOut范围之外运行。
注意:这包含在React类中,而getInput不是playSequence中的方法,它们都在一个名为“Game”的类中
答案 0 :(得分:0)
@ PHPGlue的评论有效,留下他们的答案以防将来有人偶然发现:
如果你做var t = this;在你的所有匿名函数之上,你可以在那里使用t.getInput()