<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>HTML5手机端三级联动城市选择代码</title>
<link rel="stylesheet" type="text/css" href="css/demo.css">
<style>
</style>
</head>
<body>
<div class="container">
<div class="row main" style="margin-top:30px;">
<div class="col-md-12">
<div class="row" style="line-height: 36px; text-align: center;font-size:18px;">
<a href="#" class="btn btn-info btn-lg active" role="button" id="sel_city">点击选取省市区县</a>
</div>
</div>
</div>
</div>
<script src="js/picker.min.js"></script>
<script src="js/city.js"></script>
<script>
var nameEl = document.getElementById('sel_city');
var first = []; /* 省，直辖市 */
var second = []; /* 市 */
var third = []; /* 镇 */
var selectedIndex = [0, 0, 0]; /* 默认选中的地区 */
var checked = [0, 0, 0]; /* 已选选项 */
function creatList(obj, list){
obj.forEach(function(item, index, arr){
var temp = new Object();
temp.text = item.name;
temp.value = index;
list.push(temp);
})
}
creatList(city, first);
if (city[selectedIndex[0]].hasOwnProperty('sub')) {
creatList(city[selectedIndex[0]].sub, second);
} else {
second = [{text: '', value: 0}];
}
if (city[selectedIndex[0]].sub[selectedIndex[1]].hasOwnProperty('sub')) {
creatList(city[selectedIndex[0]].sub[selectedIndex[1]].sub, third);
} else {
third = [{text: '', value: 0}];
}
var picker = new Picker({
data: [first, second, third],
selectedIndex: selectedIndex,
title: '地址选择'
});
picker.on('picker.select', function (selectedVal, selectedIndex) {
var text1 = first[selectedIndex[0]].text;
var text2 = second[selectedIndex[1]].text;
var text3 = third[selectedIndex[2]] ? third[selectedIndex[2]].text : '';
nameEl.innerText = text1 + ' ' + text2 + ' ' + text3;
});
picker.on('picker.change', function (index, selectedIndex) {
if (index === 0){
firstChange();
} else if (index === 1) {
secondChange();
}
function firstChange() {
second = [];
third = [];
checked[0] = selectedIndex;
var firstCity = city[selectedIndex];
if (firstCity.hasOwnProperty('sub')) {
creatList(firstCity.sub, second);
var secondCity = city[selectedIndex].sub[0]
if (secondCity.hasOwnProperty('sub')) {
creatList(secondCity.sub, third);
} else {
third = [{text: '', value: 0}];
checked[2] = 0;
}
} else {
second = [{text: '', value: 0}];
third = [{text: '', value: 0}];
checked[1] = 0;
checked[2] = 0;
}
picker.refillColumn(1, second);
picker.refillColumn(2, third);
picker.scrollColumn(1, 0)
picker.scrollColumn(2, 0)
}
function secondChange() {
third = [];
checked[1] = selectedIndex;
var first_index = checked[0];
if (city[first_index].sub[selectedIndex].hasOwnProperty('sub')) {
var secondCity = city[first_index].sub[selectedIndex];
creatList(secondCity.sub, third);
picker.refillColumn(2, third);
picker.scrollColumn(2, 0)
} else {
third = [{text: '', value: 0}];
checked[2] = 0;
picker.refillColumn(2, third);
picker.scrollColumn(2, 0)
}
}
});
picker.on('picker.valuechange', function (selectedVal, selectedIndex) {
console.log(selectedVal);
console.log(selectedIndex);
});
nameEl.addEventListener('click', function () {
picker.show();
});
</script>
</body>
</html>
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