picker从底部弹起的滚动选择器，现支持五种选择器，通过mode来区分，分别是普通选择器，多列选择器，时间选择器，日期选择器，省市区选择器，默认是普通选择器。
普通选择器：mode = selector；多列选择器：mode = multiSelector；时间选择器：mode = time；日期选择器：mode = date；省市区选择器：mode = region；
实例代码如下：
实例代码如下：
<view class="section">
<view class="section__title">普通选择器</view>
<picker bindchange="bindPickerChange" value="{{index}}" range="{{array}}">
<view class="picker">当前选择：{{array[index]}}</view>
</picker>
</view>
<view class="section">
<view class="section__title">多列选择器</view>
<picker
mode="multiSelector"
bindchange="bindMultiPickerChange"
bindcolumnchange="bindMultiPickerColumnChange"
value="{{multiIndex}}"
range="{{multiArray}}"
>
<view class="picker">
当前选择：{{multiArray[0][multiIndex[0]]}}，{{multiArray[1][multiIndex[1]]}}，{{multiArray[2][multiIndex[2]]}}
</view>
</picker>
</view>
<view class="section">
<view class="section__title">时间选择器</view>
<picker
mode="time"
value="{{time}}"
start="09:01"
end="21:01"
bindchange="bindTimeChange"
>
<view class="picker">当前选择: {{time}}</view>
</picker>
</view>
<view class="section">
<view class="section__title">日期选择器</view>
<picker
mode="date"
value="{{date}}"
start="2015-09-01"
end="2017-09-01"
bindchange="bindDateChange"
>
<view class="picker">当前选择: {{date}}</view>
</picker>
</view>
<view class="section">
<view class="section__title">省市区选择器</view>
<picker
mode="region"
bindchange="bindRegionChange"
value="{{region}}"
custom-item="{{customItem}}"
>
<view class="picker">
当前选择：{{region[0]}}，{{region[1]}}，{{region[2]}}
</view>
</picker>
</view>
Page({
data: {
array: ['美国', '中国', '巴西', '日本'],
objectArray: [
{
id: 0,
name: '美国'
},
{
id: 1,
name: '中国'
},
{
id: 2,
name: '巴西'
},
{
id: 3,
name: '日本'
}
],
index: 0,
multiArray: [['无脊柱动物', '脊柱动物'], ['扁性动物', '线形动物', '环节动物', '软体动物', '节肢动物'], ['猪肉绦虫', '吸血虫']],
objectMultiArray: [
[
{
id: 0,
name: '无脊柱动物'
},
{
id: 1,
name: '脊柱动物'
}
], [
{
id: 0,
name: '扁性动物'
},
{
id: 1,
name: '线形动物'
},
{
id: 2,
name: '环节动物'
},
{
id: 3,
name: '软体动物'
},
{
id: 3,
name: '节肢动物'
}
], [
{
id: 0,
name: '猪肉绦虫'
},
{
id: 1,
name: '吸血虫'
}
]
],
multiIndex: [0, 0, 0],
date: '2016-09-01',
time: '12:01',
region: ['广东省', '广州市', '海珠区'],
customItem: '全部'
},
bindPickerChange(e) {
console.log('picker发送选择改变，携带值为', e.detail.value)
this.setData({
index: e.detail.value
})
},
bindMultiPickerChange(e) {
console.log('picker发送选择改变，携带值为', e.detail.value)
this.setData({
multiIndex: e.detail.value
})
},
bindMultiPickerColumnChange(e) {
console.log('修改的列为', e.detail.column, '，值为', e.detail.value)
const data = {
multiArray: this.data.multiArray,
multiIndex: this.data.multiIndex
}
data.multiIndex[e.detail.column] = e.detail.value
switch (e.detail.column) {
case 0:
switch (data.multiIndex[0]) {
case 0:
data.multiArray[1] = ['扁性动物', '线形动物', '环节动物', '软体动物', '节肢动物']
data.multiArray[2] = ['猪肉绦虫', '吸血虫']
break
case 1:
data.multiArray[1] = ['鱼', '两栖动物', '爬行动物']
data.multiArray[2] = ['鲫鱼', '带鱼']
break
}
data.multiIndex[1] = 0
data.multiIndex[2] = 0
break
case 1:
switch (data.multiIndex[0]) {
case 0:
switch (data.multiIndex[1]) {
case 0:
data.multiArray[2] = ['猪肉绦虫', '吸血虫']
break
case 1:
data.multiArray[2] = ['蛔虫']
break
case 2:
data.multiArray[2] = ['蚂蚁', '蚂蟥']
break
case 3:
data.multiArray[2] = ['河蚌', '蜗牛', '蛞蝓']
break
case 4:
data.multiArray[2] = ['昆虫', '甲壳动物', '蛛形动物', '多足动物']
break
}
break
case 1:
switch (data.multiIndex[1]) {
case 0:
data.multiArray[2] = ['鲫鱼', '带鱼']
break
case 1:
data.multiArray[2] = ['青蛙', '娃娃鱼']
break
case 2:
data.multiArray[2] = ['蜥蜴', '龟', '壁虎']
break
}
break
}
data.multiIndex[2] = 0
break
}
console.log(data.multiIndex)
this.setData(data)
},
bindDateChange(e) {
console.log('picker发送选择改变，携带值为', e.detail.value)
this.setData({
date: e.detail.value
})
},
bindTimeChange(e) {
console.log('picker发送选择改变，携带值为', e.detail.value)
this.setData({
time: e.detail.value
})
},
bindRegionChange(e) {
console.log('picker发送选择改变，携带值为', e.detail.value)
this.setData({
region: e.detail.value
})
}
})
