我想重复代码，但不知道如何使用循环

Question

I have this code:

js:

function change_color(color) {
$("body").animate({ backgroundColor:color }, '1000');
}

setTimeout(function () {
    change_color('#4AC900'
    );
}, 500);
setTimeout(function () {
    change_color('#964514'
    );
}, 1500);
setTimeout(function () {
    change_color('#EE0000'
    );
}, 1500);
setTimeout(function () {
    change_color('#FFE303'
    );
}, 1500);
setTimeout(function () {
    change_color('#8E388E'
    );
}, 1500);
setTimeout(function () {
    change_color('#FF00AA'
    );
}, 1500);

and I want to use it repeatedly but putting it in a while loop just crashes the site can anyone help?

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Answer 1

var colors = ['#4AC900', '#964514', '#EE0000', '#FFE303', '#8E388E', '#FF00AA'],
    len = colors.length,
    i;

for (i = 0; i < len; i++) {
    (function(i, color) {
        setTimeout(function () {
            change_color(color);
        }, (i + 1) * 500);
    })(i, colors[i]);
}

Answer 2

this is all you need:

jsFiddle demo

var c = 0;
var colors = ['#4AC900','#964514','#EE0000','#FFE303','#8E388E','#FF00AA'];
(function loop(){         
    $('body').stop().animate({backgroundColor : colors[c++%colors.length] }, 1000, loop);  
})();

(Prest attention that you need to use the jQuery UI to animate the CSS background-color property)

Answer 3

var colors = {'#4AC900': 500,
              '#964514': 1500,
              // etc. Just continue with the color-millisecond combinations
             }

for(key in colors) {
 setTimeout(function () {
    change_color(key);
 }, colors[key]);
}

Answer 4

Your loop is crashing because you can't set all the necessary timeouts at browser's loading. Here is a version of your code that should work.

var colors = ['#4AC900', '#964514', '#EE0000', '#FFE303', '#8E388E', '#FF00AA'];

var currentColorIndex = 0;
var scheduleChange;
scheduleChange = function() {
    change_color(currentColorIndex);
    currentColorIndex = (currentColorIndex + 1) % colors.length
    setTimeout(scheduleChange, 1000);
};

setTimeout(scheduleChange, 500);

Answer 5

function change_color(color) {
  $("body").animate({ backgroundColor:color }, '1000');
}

setTimeout(function() {
  change_color('#4AC900')
}, 500);

colors = ['#964514', '#EE0000', '#FFE303', '#8E388E', '#FF00AA']

interval = setInterval(function() {
  if (! a.length) {
    return clearInterval(interval);
  }
  change_colors(a.shift());
}, 1500);

Have Fun. You should learn about closures for not messing setIntervals. There are tons of libraries that animate colors and other stuff. I can recommend morpheus by ded .