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shake.js实现微信摇一摇功能
项目要求实现点击摇一摇图片,图片摇一摇,并且摇一摇手机,图片也要摇一摇。
关于用js怎样实现摇一摇手机图片摇一摇,我在网络上找了一些方法,真正有用的是shake.js。
接下来,上shake.js源码:
/* * Author: Alex Gibson * https://github.com/alexgibson/shake.js * License: MIT license */ (function(global, factory) { if (typeof define === ‘function‘ && define.amd) { define(function() { return factory(global, global.document); }); } else if (typeof module !== ‘undefined‘ && module.exports) { module.exports = factory(global, global.document); } else { global.Shake = factory(global, global.document); } } (typeof window !== ‘undefined‘ ? window : this, function (window, document) { ‘use strict‘; function Shake(options) { //feature detect this.hasDeviceMotion = ‘ondevicemotion‘ in window; this.options = { threshold: 15, //default velocity threshold for shake to register timeout: 1000 //default interval between events }; if (typeof options === ‘object‘) { for (var i in options) { if (options.hasOwnProperty(i)) { this.options[i] = options[i]; } } } //use date to prevent multiple shakes firing this.lastTime = new Date(); //accelerometer values this.lastX = null; this.lastY = null; this.lastZ = null; //create custom event if (typeof document.CustomEvent === ‘function‘) { this.event = new document.CustomEvent(‘shake‘, { bubbles: true, cancelable: true }); } else if (typeof document.createEvent === ‘function‘) { this.event = document.createEvent(‘Event‘); this.event.initEvent(‘shake‘, true, true); } else { return false; } } //reset timer values Shake.prototype.reset = function () { this.lastTime = new Date(); this.lastX = null; this.lastY = null; this.lastZ = null; }; //start listening for devicemotion Shake.prototype.start = function () { this.reset(); if (this.hasDeviceMotion) { window.addEventListener(‘devicemotion‘, this, false); } }; //stop listening for devicemotion Shake.prototype.stop = function () { if (this.hasDeviceMotion) { window.removeEventListener(‘devicemotion‘, this, false); } this.reset(); }; //calculates if shake did occur Shake.prototype.devicemotion = function (e) { var current = e.accelerationIncludingGravity; var currentTime; var timeDifference; var deltaX = 0; var deltaY = 0; var deltaZ = 0; if ((this.lastX === null) && (this.lastY === null) && (this.lastZ === null)) { this.lastX = current.x; this.lastY = current.y; this.lastZ = current.z; return; } deltaX = Math.abs(this.lastX - current.x); deltaY = Math.abs(this.lastY - current.y); deltaZ = Math.abs(this.lastZ - current.z); if (((deltaX > this.options.threshold) && (deltaY > this.options.threshold)) || ((deltaX > this.options.threshold) && (deltaZ > this.options.threshold)) || ((deltaY > this.options.threshold) && (deltaZ > this.options.threshold))) { //calculate time in milliseconds since last shake registered currentTime = new Date(); timeDifference = currentTime.getTime() - this.lastTime.getTime(); if (timeDifference > this.options.timeout) { window.dispatchEvent(this.event); this.lastTime = new Date(); } } this.lastX = current.x; this.lastY = current.y; this.lastZ = current.z; }; //event handler Shake.prototype.handleEvent = function (e) { if (typeof (this[e.type]) === ‘function‘) { return this[e.type](e); } }; return Shake; }));
我的项目是vue+webpack实现的,所以实现代码如下:
//引入shake.js var Shake = require(‘./js/shake.js‘); //如何使用 //手机摇一摇触发事件 //create a new instance of shake.js. var myShakeEvent = new Shake({ threshold: 15 }); // start listening to device motion myShakeEvent.start(); // register a shake event window.addEventListener(‘shake‘, shakeEventDidOccur, false); //shake event callback function shakeEventDidOccur () { //put your own code here etc. $(‘.shake‘).addClass(‘shake_animate‘); }
兼容性:
- iOS Safari 4.2.1 (and above)
- Android 4.0.3 (default browser)
- Chrome 41+ for Android
- Opera Mobile (Android)
- BlackBerry PlayBook 2.0
- Firefox for Android
- FirefoxOS Devices
shake.js在github路径:https://github.com/alexgibson/shake.js
shake.js实现微信摇一摇功能
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