写在前面
因最近项目需要制作一个聊天界面，对比后感觉MUI源码内的im-chat.html文件对各种情况的处理比较的全面，因此，将整个页面的逻辑从头到尾理了一遍，希望有需求的小伙伴可以少走弯路，通过这个模板，可以根据我们自己需要的功能进行定制，如果不是很清楚（用词不当）的地方，还请小伙伴们提出来，做相关修改，谢谢！
ps：理这种逻辑性的东西需要耐心，所以希望小伙伴能够静下心来慢慢理，任何代码都是根据需求实现。所以，可以结合实际操作来看相关模块。最后，求一波关注，哈哈！
相关引用
这个聊天框架基于MUI开发，正常引入相关文件后，还需引入如下文件：
- 图片预览的mui.imageviewer.css样式文件，
- 处理图片浏览的mui.imageViewer.js文件，
- 模板渲染的arttmpl.js文件；
代码详解
<body contextmenu="return false;">
<header class="mui-bar mui-bar-nav">
<a class="mui-action-back mui-icon mui-icon-left-nav mui-pull-left"></a>
<h1 class="mui-title">chat (聊天窗口)</h1>
</header>
<pre id='h'></pre>
<script id='msg-template' type="text/template">
<% for(var i in record){ var item=record[i]; %>
<div class="msg-item <%= (item.sender=='self'?' msg-item-self':'') %>" msg-type='<%=(item.type)%>' msg-content='<%=(item.content)%>'>
<% if(item.sender=='self' ) { %>
<i class="msg-user mui-icon mui-icon-person"></i>
<% } else { %>
<img class="msg-user-img" src="../images/logo.png" alt="" />
<% } %>
<div class="msg-content">
<div class="msg-content-inner">
<% if(item.type=='text' ) { %>
<%=( item.content|| ' ') %>
<% } else if(item.type=='image' ) { %>
<img class="msg-content-image" src="<%=(item.content)%>" style="max-width: 100px;" />
<% } else if(item.type=='sound' ) { %>
<span class="mui-icon mui-icon-mic" style="font-size: 18px;font-weight: bold;"></span>
<span class="play-state">点击播放</span>
<% } %>
</div>
<div class="msg-content-arrow"></div>
</div>
<div class="mui-item-clear"></div>
</div>
<% } %>
</script>
<div class="mui-content">
<div id='msg-list'>
</div>
</div>
<footer>
<div class="footer-left">
<i id='msg-image' class="mui-icon mui-icon-camera" style="font-size: 28px;"></i>
</div>
<div class="footer-center">
<textarea id='msg-text' type="text" class='input-text'></textarea>
<button id='msg-sound' type="button" class='input-sound' style="display: none;">按住说话</button>
</div>
<label for="" class="footer-right">
<i id='msg-type' class="mui-icon mui-icon-mic"></i>
</label>
</footer>
<div id='sound-alert' class="rprogress">
<div class="rschedule"></div>
<div class="r-sigh">!</div>
<div id="audio_tips" class="rsalert">手指上滑，取消发送</div>
</div>
<script src="../js/mui.min.js"></script>
<script src="../js/mui.imageViewer.js"></script>
<script src="../js/arttmpl.js"></script>
<script type="text/javascript" charset="utf-8">
(function($, doc) {
var MIN_SOUND_TIME = 800;
$.init({
gestureConfig: {
tap: true, //默认为true
doubletap: true, //默认为false
longtap: true, //默认为false
swipe: true, //默认为true
drag: true, //默认为true
hold: true, //默认为false，不监听
release: true //默认为false，不监听
}
});
template.config('escape', false);
//$.plusReady=function(fn){fn();};
$.plusReady(function() {
plus.webview.currentWebview().setStyle({
softinputMode: "adjustResize"
});
//强制弹出键盘
var showKeyboard = function() {
if ($.os.ios) {
var webView = plus.webview.currentWebview().nativeInstanceObject();
webView.plusCallMethod({
"setKeyboardDisplayRequiresUserAction": false
});
} else {
var Context = plus.android.importClass("android.content.Context");
var InputMethodManager = plus.android.importClass("android.view.inputmethod.InputMethodManager");
var main = plus.android.runtimeMainActivity();
var imm = main.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(0, InputMethodManager.SHOW_FORCED);
//var view = ((ViewGroup)main.findViewById(android.R.id.content)).getChildAt(0);
imm.showSoftInput(main.getWindow().getDecorView(), InputMethodManager.SHOW_IMPLICIT);
//alert("ll");
}
};
var record = [{
sender: 'zs',
type: 'text',
content: 'Hi，我是 MUI 小管家！'
}];
var ui = {
body: doc.querySelector('body'),
footer: doc.querySelector('footer'),
footerRight: doc.querySelector('.footer-right'),
footerLeft: doc.querySelector('.footer-left'),
btnMsgType: doc.querySelector('#msg-type'),
boxMsgText: doc.querySelector('#msg-text'),
boxMsgSound: doc.querySelector('#msg-sound'),
btnMsgImage: doc.querySelector('#msg-image'),
areaMsgList: doc.querySelector('#msg-list'),
boxSoundAlert: doc.querySelector('#sound-alert'),
h: doc.querySelector('#h'),
content: doc.querySelector('.mui-content')
};
//将文本框宽度赋值给h
ui.h.style.width = ui.boxMsgText.offsetWidth + 'px';
//alert(ui.boxMsgText.offsetWidth );
//让文本框居中
var footerPadding = ui.footer.offsetHeight - ui.boxMsgText.offsetHeight;
//语音输入相关操作
var msgItemTap = function(msgItem, event) {
var msgType = msgItem.getAttribute('msg-type');
var msgContent = msgItem.getAttribute('msg-content')
if (msgType == 'sound') {
player = plus.audio.createPlayer(msgContent);
var playState = msgItem.querySelector('.play-state');
playState.innerText = '正在播放...';
player.play(function() {
playState.innerText = '点击播放';
}, function(e) {
playState.innerText = '点击播放';
});
}
};
//图片预览组件
var imageViewer = new $.ImageViewer('.msg-content-image', {
dbl: false
});
//绑定消息节点
var bindMsgList = function() {
//绑定数据:
/*tp.bind({
template: 'msg-template',
element: 'msg-list',
model: record
});*/
//将数据绑定到界面上
ui.areaMsgList.innerHTML = template('msg-template', {
"record": record
});
//拿到所有的聊天节点
var msgItems = ui.areaMsgList.querySelectorAll('.msg-item');
//因为document.querySelectorAll()返回的并不是我们想当然的数组，而是NodeList，对NodeList，它里面没有.forEach方法，我们使用了这样的方法进行循环：
//通过call将this绑定到msgItems（以[]下标的方式去遍历msgItems）
[].forEach.call(msgItems, function(item, index) {
item.addEventListener('tap', function(event) {
//处理语音消息播放
msgItemTap(item, event);
}, false);
});
//查找所有符合条件的图片
imageViewer.findAllImage();
//聊天界面的高度修改
ui.areaMsgList.scrollTop = ui.areaMsgList.scrollHeight + ui.areaMsgList.offsetHeight;
};
bindMsgList();
//平滑高度过渡
window.addEventListener('resize', function() {
ui.areaMsgList.scrollTop = ui.areaMsgList.scrollHeight + ui.areaMsgList.offsetHeight;
}, false);
//发送对象声明
var send = function(msg) {
//将消息内容体push进record
record.push(msg);
//绑定消息节点
bindMsgList();
toRobot(msg.content);
};
var toRobot = function(info) {
var apiUrl = 'http://www.tuling123.com/openapi/api';
$.getJSON(apiUrl, {
"key": 'acfbca724ea1b5db96d2eef88ce677dc',
"info": info,
"userid": plus.device.uuid
}, function(data) {
//alert(JSON.stringify(data));
record.push({
sender: 'zs',
type: 'text',
content: data.text
});
bindMsgList();
});
};
//让输入框获取焦点
function msgTextFocus() {
ui.boxMsgText.focus();
setTimeout(function() {
ui.boxMsgText.focus();
}, 150);
}
//解决长按“发送”按钮，导致键盘关闭的问题；
ui.footerRight.addEventListener('touchstart', function(event) {
if (ui.btnMsgType.classList.contains('mui-icon-paperplane')) {
msgTextFocus();
event.preventDefault();
}
});
//解决长按“发送”按钮，导致键盘关闭的问题；
ui.footerRight.addEventListener('touchmove', function(event) {
if (ui.btnMsgType.classList.contains('mui-icon-paperplane')) {
msgTextFocus();
event.preventDefault();
}
});
// ui.footerRight.addEventListener('touchcancel', function(event) {
// if (ui.btnMsgType.classList.contains('mui-icon-paperplane')) {
// msgTextFocus();
// event.preventDefault();
// }
// });
// ui.footerRight.addEventListener('touchend', function(event) {
// if (ui.btnMsgType.classList.contains('mui-icon-paperplane')) {
// msgTextFocus();
// event.preventDefault();
// }
// });
//长按离开屏幕时触发
ui.footerRight.addEventListener('release', function(event) {
//当是文字时
if (ui.btnMsgType.classList.contains('mui-icon-paperplane')) {
//showKeyboard();
ui.boxMsgText.focus();
setTimeout(function() {
ui.boxMsgText.focus();
}, 150);
// event.detail.gesture.preventDefault();
send({
sender: 'self',
type: 'text',
content: ui.boxMsgText.value.replace(new RegExp('\n', 'gm'), '<br/>')
});
ui.boxMsgText.value = '';
$.trigger(ui.boxMsgText, 'input', null);
}
//当是语音时
else if (ui.btnMsgType.classList.contains('mui-icon-mic')) {
ui.btnMsgType.classList.add('mui-icon-compose');
ui.btnMsgType.classList.remove('mui-icon-mic');
ui.boxMsgText.style.display = 'none';
ui.boxMsgSound.style.display = 'block';
ui.boxMsgText.blur();
document.body.focus();
}
//当是文本状态时
else if (ui.btnMsgType.classList.contains('mui-icon-compose')) {
ui.btnMsgType.classList.add('mui-icon-mic');
ui.btnMsgType.classList.remove('mui-icon-compose');
ui.boxMsgSound.style.display = 'none';
ui.boxMsgText.style.display = 'block';
//--
//showKeyboard();
ui.boxMsgText.focus();
setTimeout(function() {
ui.boxMsgText.focus();
}, 150);
}
}, false);
//点击左边按钮时
ui.footerLeft.addEventListener('tap', function(event) {
var btnArray = [{
title: "拍照"
}, {
title: "从相册选择"
}];
plus.nativeUI.actionSheet({
title: "选择照片",
cancel: "取消",
buttons: btnArray
}, function(e) {
var index = e.index;
switch (index) {
case 0:
break;
case 1:
var cmr = plus.camera.getCamera();
cmr.captureImage(function(path) {
send({
sender: 'self',
type: 'image',
content: "file://" + plus.io.convertLocalFileSystemURL(path)
});
}, function(err) {});
break;
case 2:
plus.gallery.pick(function(path) {
send({
sender: 'self',
type: 'image',
content: path
});
}, function(err) {}, null);
break;
}
});
}, false);
//控制按住语音时的显示与隐藏
var setSoundAlertVisable=function(show){
if(show){
ui.boxSoundAlert.style.display = 'block';
ui.boxSoundAlert.style.opacity = 1;
}else{
ui.boxSoundAlert.style.opacity = 0;
//fadeOut 完成再真正隐藏
setTimeout(function(){
ui.boxSoundAlert.style.display = 'none';
},200);
}
};
var recordCancel = false;
var recorder = null;
var audio_tips = document.getElementById("audio_tips");
var startTimestamp = null;
var stopTimestamp = null;
var stopTimer = null;
//按住说话时候触发
ui.boxMsgSound.addEventListener('hold', function(event) {
recordCancel = false;
//如果有结束时间，清除定时器
if(stopTimer)clearTimeout(stopTimer);
//修改显示文字
audio_tips.innerHTML = "手指上划，取消发送";
//移除rprogress-sigh
ui.boxSoundAlert.classList.remove('rprogress-sigh');
//显示样式
setSoundAlertVisable(true);
//获取录音对象 5+模块
recorder = plus.audio.getRecorder();
if (recorder == null) {
plus.nativeUI.toast("不能获取录音对象");
return;
}
//记录当前录音时间
startTimestamp = (new Date()).getTime();
//保存录音http://www.html5plus.org/doc/zh_cn/audio.html#plus.audio.RecordOption
recorder.record({
filename: "_doc/audio/"
}, function(path) {
if (recordCancel) return;
send({
sender: 'self',
type: 'sound',
content: path
});
}, function(e) {
plus.nativeUI.toast("录音时出现异常: " + e.message);
});
}, false);
//监听drag（拖动中）事件 上滑;下滑事件
ui.body.addEventListener('drag', function(event) {
//console.log('drag');
if (Math.abs(event.detail.deltaY) > 50) {
//此时没有录音操作执行 检查recordCancel状态
if (!recordCancel) {
recordCancel = true;
if (!audio_tips.classList.contains("cancel")) {
audio_tips.classList.add("cancel");
}
audio_tips.innerHTML = "松开手指，取消发送";
}
} else {
if (recordCancel) {
recordCancel = false;
if (audio_tips.classList.contains("cancel")) {
audio_tips.classList.remove("cancel");
}
audio_tips.innerHTML = "手指上划，取消发送";
}
}
}, false);
//长按离开录音节点时执行
ui.boxMsgSound.addEventListener('release', function(event) {
//console.log('release');
//初始化
if (audio_tips.classList.contains("cancel")) {
audio_tips.classList.remove("cancel");
audio_tips.innerHTML = "手指上划，取消发送";
}
//判断录音是否小于800毫秒，若小于，则废弃
stopTimestamp = (new Date()).getTime();
if (stopTimestamp - startTimestamp < MIN_SOUND_TIME) {
audio_tips.innerHTML = "录音时间太短";
ui.boxSoundAlert.classList.add('rprogress-sigh');
recordCancel = true;
stopTimer=setTimeout(function(){
setSoundAlertVisable(false);
},800);
}else{
setSoundAlertVisable(false);
}
//停止录音模块
recorder.stop();
}, false);
//阻止浏览器默认的事件冒泡
ui.boxMsgSound.addEventListener("touchstart", function(e) {
//console.log("start....");
e.preventDefault();
});
//监听用户输入时触发
ui.boxMsgText.addEventListener('input', function(event) {
//当输入为空时去掉发送文字，当不为空时，显示发送文字
ui.btnMsgType.classList[ui.boxMsgText.value == '' ? 'remove' : 'add']('mui-icon-paperplane');
//当用户输入值不为空时，设置自定义属性for 赋值msg-text
ui.btnMsgType.setAttribute("for", ui.boxMsgText.value == '' ? '' : 'msg-text');
//替换与正则表达式相匹配的值(转义)
ui.h.innerText = ui.boxMsgText.value.replace(new RegExp('\n', 'gm'), '\n-') || '-';
//动态调整输入框高度
ui.footer.style.height = (ui.h.offsetHeight + footerPadding) + 'px';
//调整显示信息高度
ui.content.style.paddingBottom = ui.footer.style.height;
});
var focus = false;
//监听用户点击发送时触发
ui.boxMsgText.addEventListener('tap', function(event) {
//得到焦点
ui.boxMsgText.focus();
setTimeout(function() {
ui.boxMsgText.focus();
}, 0);
focus = true;
setTimeout(function () {
focus = false;
},1000);
//阻止iOS2.0中的手势事件：gesture事件
event.detail.gesture.preventDefault();
}, false);
//点击消息列表，关闭键盘
ui.areaMsgList.addEventListener('click',function (event) {
if(!focus){
ui.boxMsgText.blur();
}
})
});
}(mui, document));
</script>
</body>
