main-i_active加不进
好想知道main-i_active怎么加不进去……，Uncaught TypeError:Cannot read property 'className' of null
白小纯King
2017-07-26
2 回答
//1.数据定义(实际生产环境中，应由后台给出)
var data = [
{img:1,h1:'Creative',h2:'DUTE'},
{img:2,h1:'Friendly',h2:'DEVIL'},
{img:3,h1:'Tranquilent',h2:'COMPATRIOT'},
{img:4,h1:'Insecure',h2:'HUSSLER'},
{img:5,h1:'Loving',h2:'REBEL'},
{img:6,h1:'Passionate',h2:'SEEKER'},
{img:7,h1:'Crazy',h2:'FRIEND'}
]
//2.通用函数
var g = function(id){
if(id.substr(0,1)=='.'){
return document.getElementsByClassName(id.substr(1))
}
return document.getElementById(id)
}
//3.添加幻灯片的操作（所有幻灯片&对应的按钮）
function addSliders(){
//3.1获取模板
var tpl_main = g('template_main').innerHTML.replace(/^\s*/,'').replace(/\s*$/,'');
var tpl_ctrl = g('template_ctrl').innerHTML.replace(/^\s*/,'').replace(/\s*$/,'');
//3.2定义最终输出HTML的变量
var out_main = [];
var out_ctrl = [];
//3.3遍历所有数据，构建最终输出的HTML
for(i in data){
var _html_main = tpl_main.replace(/{{index}}/g,data[i].img).replace(/{{h2}}/g,data[i].h1).replace(/{{h3}}/g,data[i].h2)
var _html_ctrl = tpl_ctrl.replace(/{{index}}/g,data[i].img);
out_main.push(_html_main);
out_ctrl.push(_html_ctrl);
}
//3.4把html回写到对应的DOM里面
g('template_main').innerHTML = out_main.join('');
g('template_ctrl').innerHTML = out_ctrl.join('')
}
//5.幻灯片切换
function switchSlider(n){
//5.1获得要展现的幻灯片&控制按钮DOM
var main = g('main_'+n);
var ctrl = g('ctrl_'+n);
//5.2获得所有的幻灯片以及控制按钮
var clear_main = g('.main-i');
var clear_ctrl = g('.ctrl-i');
//5.3清除active样式；
for (i = 0; i < clear_main.length; i++) {
clear_ctrl[i].className = clear_ctrl[i].className.replace('ctrl-i_active','');
clear_main[i].className = clear_main[i].className.replace('main-i_active','');
}
main.className += 'main-i_active';
ctrl.className += 'ctrl-i_active';
}
//4.定义何时处理幻灯片输出
window.onload = function(){
addSliders();
switchSlider();
}举报
0/150
提交
取消
