jquery同步动画

jquery无法进行同步动画。

记住,javascript运行在浏览器的UI线程上。

如果制作同步动画,浏览器将冻结,直到动画完成。

你为什么要这么做?

您可能应该使用jquery的回调参数并在回调中继续方法代码,如下所示:

function doSomething() {
    var thingy = whatever;
    //Do things
    $('something').animate({ width: 70 }, function() {
        //jQuery will call this method after the animation finishes.
        //You can continue your code here.
        //You can even access variables from the outer function
        thingy = thingy.fiddle;
    });
}

这被称为终结。

我想你应该看看jquery queue() 方法。

queue()的doc explain jquery动画不仅不会真正阻塞用户界面,而且会逐个对其进行排队。

它还提供了一种使动画和函数调用顺序化的方法(这是我对您所说的意思的最好理解” 同步的 “”,像:

$("#myThrobber")
    .show("slow")                 // provide user feedback 
    .queue( myNotAnimatedMethod ) // do some heavy duty processing
    .hide("slow");                // provide user feedback (job's 

myNotAnimatedMethod() { // or animated, just whatever you want anyhow...
    // do stuff
    // ...

    // tells #myThrobber's ("this") queue your method "returns", 
    // and the next method in the queue (the "hide" animation) can be processed
    $(this).dequeue();

    // do more stuff here that needs not be sequentially done *before* hide()
    // 
}  

当然,这对于异步处理来说是多余的;但是如果您的方法实际上是一个普通的老同步JavaScript方法,那么这可能就是实现它的方法。

希望这对我有帮助,也为我糟糕的英语感到抱歉…

jquery为其.animate()方法提供了一个“step”回调。您可以使用此链接进行同步动画:

jQuery('#blat').animate({
  // CSS to change
  height: '0px'
},
{
  duration: 2000,
  step: function _stepCallback(now,opts) {
    // Stop browser rounding errors for bounding DOM values (width, height, margin, etc.)
    now = opts.now = Math.round(now);

    // Manipulate the width/height of other elements as 'blat' is animated
    jQuery('#foo').css({height: now+'px'});
    jQuery('#bar').css({width: now+'px'});
  },
  complete: function _completeCallback() {
    // Do some other animations when finished...
  }
}

我同意@slaks的说法。您应该使用jquery对给定动画的回调来创建同步动画。基本上,您可以为当前动画获取任何内容,然后像这样将其拆分:

$yourClass = $('.yourClass');
$yourClass.animate({
    width: "70%"
}, 'slow', null, function() {
    $yourClass.animate({
        opacity: 0.4
    }, 'slow', null, function() {
        $yourClass.animate({
            borderWidth: "10px"
        });
    });
});

这里有一个模块,我放在一起一段时间,以帮助运行动画顺序。

用途:

var seq = [
    { id: '#someelement', property:'opacity', initial: '0.0', value:'1.0', duration:500 },
    { id: '#somethingelse', property:'opacity', value:'1.0', duration: 500 }
];

Sequencer.runSequence(seq);

var Sequencer = (function($) {
    var _api = {},
        _seq = {},
        _seqCount = 0,
        _seqCallback = {};

    function doAnimation(count, step) {
        var data = _seq[count][step],
            props = {};

            props[data.property] = data.value

        $(data.id).animate(props, data.duration, function() {
            if (step+1 < _seq[count].length) {
                doAnimation(count, ++step);
            } else {
                if (typeof _seqCallback[count] === "function") {
                    _seqCallback[count]();
                }
            }
        });
    }

    _api.buildSequence = function(id, property, initial, steps) {
        var newSeq = [],
            step = {
                id: id,
                property: property,
                initial: initial
            };

        $.each(steps, function(idx, s) {
            step = {};
            if (idx == 0) {
                step.initial = initial;
            }
            step.id = id;
            step.property = property;
            step.value = s.value;
            step.duration = s.duration;
            newSeq.push(step);
        });

        return newSeq;
    }

    _api.initSequence = function (seq) {
        $.each(seq, function(idx, s) {              
            if (s.initial !== undefined) {
                var prop = {};
                prop[s.property] = s.initial;
                $(s.id).css(prop);
            }            
        });
    }

    _api.initSequences = function () {
        $.each(arguments, function(i, seq) {
            _api.initSequence(seq);
        });
    }

    _api.runSequence = function (seq, callback) {
        //if (typeof seq === "function") return;
        _seq[_seqCount] = [];
        _seqCallback[_seqCount] = callback;

        $.each(seq, function(idx, s) {

            _seq[_seqCount].push(s);
            if (s.initial !== undefined) {
                var prop = {};
                prop[s.property] = s.initial;
                $(s.id).css(prop);
            }

        });


        doAnimation(_seqCount, 0);
        _seqCount += 1;
    }

    _api.runSequences = function() {
        var i = 0.
            args = arguments,
            runNext = function() {
                if (i+1 < args.length) {
                    i++;
                    if (typeof args[i] === "function") {
                        args[i]();
                        runNext();
                    } else {
                        _api.runSequence(args[i], function() {
                            runNext();
                        });
                    }
                }
            };

        // first we need to set the initial values of all sequences that specify them
        $.each(arguments, function(idx, seq) {
            if (typeof seq !== "function") {
                $.each(seq, function(idx2, seq2) {
                    if (seq2.initial !== undefined) {
                        var prop = {};
                        prop[seq2.property] = seq2.initial;
                        $(seq2.id).css(prop);
                    }
                });
            }

        });

        _api.runSequence(arguments[i], function (){
            runNext();
        });

    }

    return _api;
}(jQuery));

jquery可以制作同步动画。看看这个:

function DoAnimations(){
  $(function(){
    $("#myDiv").stop().animate({ width: 70 }, 500);
    $("#myDiv2").stop().animate({ width: 100 }, 500);
  });
}

我发现了这个 http://lab.gracecode.com/motion/ 非常容易使用,与jquery结合使用效果很好。

编辑 链接似乎断了。如果我跟踪了那些回程档案,代码就在 https://github.com/feelinglucky/motion