http://blog.csdn.net/xiaolongtotop/article/details/8309635
從jQuery API 文檔中可以知道,jQuery自定義動畫的函數.animate( properties [, duration] [, easing] [, complete] )有四個參數:
- properties:一組包含作爲動畫屬性和終值的樣式屬性和及其值的集合
- duration(可選):動畫執行時間,其值可以是三種預定速度之一的字符串("slow", "normal", or "fast")或表示動畫時長的毫秒數值(如:1000)
- easing(可選):要使用的過渡效果的名稱,如:"linear" 或"swing"
- complete(可選):在動畫完成時執行的函數
jQuery easing 使用方法
- <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.3.js"></script>
- <script type="text/javascript" src="http://gsgd.co.uk/sandbox/jquery/easing/jquery.easing.1.3.js"></script>
引入之後,easing參數可選的值就有以下32種:
- linear
- swing
- easeInQuad
- easeOutQuad
- easeInOutQuad
- easeInCubic
- easeOutCubic
- easeInOutCubic
- easeInQuart
- easeOutQuart
- easeInOutQuart
- easeInQuint
- easeOutQuint
- easeInOutQuint
- easeInExpo
- easeOutExpo
- easeInOutExpo
- easeInSine
- easeOutSine
- easeInOutSine
- easeInCirc
- easeOutCirc
- easeInOutCirc
- easeInElastic
- easeOutElastic
- easeInOutElastic
- easeInBack
- easeOutBack
- easeInOutBack
- easeInBounce
- easeOutBounce
- easeInOutBounce
- jQuery.extend( jQuery.easing,
- {
- easeOutExpo: function (x, t, b, c, d) {
- return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
- },
- easeOutBounce: function (x, t, b, c, d) {
- if ((t/=d) < (1/2.75)) {
- return c*(7.5625*t*t) + b;
- } else if (t < (2/2.75)) {
- return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
- } else if (t < (2.5/2.75)) {
- return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
- } else {
- return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
- }
- },
- });
使用jQuery自定義動畫函數animate來指定easing效果,如自定義一種類彈簧效果的動畫:
- $(myElement).animate({
- top: 500,
- opacity: 1
- }, 1000, 'easeOutBounce');
值得一提的是jQuery 1.4版本中對animate()方法,easing的方法進行了擴展,支持爲每個屬性指定easing方法,詳細請參考這裏,如:
- $(myElement).animate({
- left: [500, 'swing'],
- top: [200, 'easeOutBounce']
- });
- $(myElement).animate({
- left: 500,
- top: 200
- }, {
- specialEasing: {
- left: 'swing',
- top: 'easeOutBounce'
- }
- });
使用jQuery內置動畫函數如slideUp()、slideDown()等來指定easing效果,以下兩種方法都可以:
- $(myElement).slideUp(1000, method, callback});
- $(myElement).slideUp({
- duration: 1000,
- easing: method,
- complete: callback
- });
jQuery easing 圖解
1. linear | 2. swing | 3. easeInQuad | 4. easeOutQuad | 5. easeInOutQuad | 6. easeInCubic |
7. easeOutCubic | 8. easeInOutCubic | 9. easeInQuart | 10. easeOutQuart | 11. easeInOutQuart | 12. easeInQuint |
13. easeOutQuint | 14. easeInOutQuint | 15. easeInExpo | 16. easeOutExpo | 17. easeInOutExpo | 18. easeInSine |
19. easeOutSine | 20. easeInOutSine | 21. easeInCirc | 22. easeOutCirc | 23. easeInOutCirc | 24. easeInElastic |
25. easeOutElastic | 26. easeInOutElastic | 27. easeInBack | 28. easeOutBack | 29. easeInOutBack | 30. easeInBounce |
31. easeOutBounce | 32. easeInOutBounce |