# picker

The **\<picker>** component supports common, date, time, data and time, and multi-column text selectors.

## Required Permissions

None

## Child Component

None

## Attributes

In addition to the attributes in [Universal Attributes](js-components-common-attributes.md), the following attributes are supported.



| Name | Type   | Default Value | Mandatory | Description                                                  |
| ---- | ------ | ------------- | --------- | ------------------------------------------------------------ |
| type | string | -             | No        | Dynamic modification is not supported. Available values include:<br/>-**text**: text selector<br/>-**data**: date selector<br/>-**time**: time selector<br/>-**datetime**: date and time selector<br/>-**multi-text**: multi-column text selector |

### Text Selector

When **type** is set to **text**, a text selector is used.



| Name     | Type   | Default Value | Mandatory | Description                                                  |
| -------- | ------ | ------------- | --------- | ------------------------------------------------------------ |
| range    | Array  | -             | No        | Value range of the common selector, for example, **["15", "20", "25"]**.NOTE:Use the data binding mode, for example, range = {{data}}. Declare the corresponding variable **data: ["15", "20", "25"]** in the JavaScript. |
| selected | string | 0             | No        | Default value of the common selector. The value should be the index of **range**. |
| value    | string | -             | No        | Value of the common selector.                                |

### Date Selector

When **type** is set to **date**, a date selector is used.



| Name        | Type    | Default Value | Mandatory | Description                                                  |
| ----------- | ------- | ------------- | --------- | ------------------------------------------------------------ |
| start       | \<time>  | 1970-1-1      | No        | Start date of the date selector, in the format of YYYY-MM-DD. |
| end         | \<time>  | 2100-12-31    | No        | End date of the date selector, in the format of YYYY-MM-DD.  |
| selected    | string  | Current date  | No        | Default value of the date selector, in format of YYYY-MM-DD. |
| value       | string  | -             | Yes       | Value of the date selector.                                  |
| lunar5+     | boolean | false         | No        | Whether the pop-up window displays the lunar calendar.       |
| lunarswitch | boolean | false         | No        | Whether the date selector displays the lunar calendar switch, which is used to switch between the Gregorian calendar and lunar calendar. The value **true** means to display the lunar calendar switch for users to switch between the Gregorian calendar and lunar calendar. The value **false** means not to display the lunar calendar switch.NOTE:When both **lunarswitch** and **lunar** are set to **true**, the switch is selected. |

### Time Selector

When **type** is set to **time**, a time selector is used.



| Name          | Type    | Default Value | Mandatory | Description                                                  |
| ------------- | ------- | ------------- | --------- | ------------------------------------------------------------ |
| containsecond | boolean | false         | No        | Whether seconds are contained.                               |
| selected      | string  | Current time  | No        | Default value of the time selector, in the format of HH:mm. If seconds are contained, the format is HH:mm:ss. |
| value         | string  | -             | No        | Value of the time selector.                                  |
| hours         | number  | 241-4-5+      | No        | Time format used by the time selector. Available values include:<br/>-**12**: displayed in 12-hour format and distinguished by a.m. and p.m.<br/>-**24**: displayed in 24-hour formatNOTE:The default value is the most commonly-used hour format in the current locale. 5+ |

### Date and Time Selector

When **type** is set to **datetime**, a date and time selector is used.



| Name        | Type    | Default Value         | Mandatory | Description                                                  |
| ----------- | ------- | --------------------- | --------- | ------------------------------------------------------------ |
| selected    | string  | Current date and time | No        | Default value of the date and time selector. The value can be in either of the following formats:<br/>-MM-DD-HH-mm<br/>-YYYY-MM-DD-HH-mmIf the year is not set, the current year is used by default. <br/>-The value you set is the date selected by default in the pop-up window. |
| value       | string  | -                     | Yes       | Value of the date and time selector.                         |
| hours       | number  | 241-4-5+              | No        | Time format used by the date and time selector. Available values include:<br/>-**12**: displayed in 12-hour format and distinguished by a.m. and p.m.<br/>-**24**: displayed in 24-hour format<br/>NOTE:The default value is the most commonly-used hour format in the current locale. 5+ |
| lunar5+     | boolean | false                 | No        | Whether the pop-up window displays the lunar calendar.       |
| lunarswitch | boolean | false                 | No        | Whether the date selector displays the lunar calendar switch, which is used to switch between the Gregorian calendar and lunar calendar. The value **true** means to display the lunar calendar switch for users to switch between the Gregorian calendar and lunar calendar. The value **false** means not to display the lunar calendar switch.NOTE:When both **lunarswitch** and **lunar** are set to **true**, the switch is selected. |

### Multi-Column Text Selector

When **type** is set to **multi-text**, a multi-column text selector is used.



| Name     | Type                  | Default Value | Mandatory | Description                                                  |
| -------- | --------------------- | ------------- | --------- | ------------------------------------------------------------ |
| columns  | number                | -             | Yes       | Number of columns in the multi-column text selector.         |
| range    | Two-dimensional array | -             | No        | Items of the multi-column text selector. **range** is a two-dimensional array that indicates the number of columns. Each item in the array indicates the data of each column, for example, **[["a","b"], ["c","d"]]**.NOTE:Use the data binding mode, for example, range = {{data}}. Declare the corresponding variable **data: [["a","b"], ["c","d"]]** in the JavaScript. |
| selected | Array                 | 0,0,0,...     | No        | Default value of the multi-column text selector, which is an array consisting of the indexes of the selected items in each column. |
| value    | Array                 | -             | No        | Value of the multi-column text selector, which is an array consisting of the values of the selected items in each column. |

## Styles

In addition to the styles in [Universal Styles](js-components-common-styles.md), the following styles are supported.



| Name            | Type             | Default Value | Mandatory | Description                                                  |
| --------------- | ---------------- | ------------- | --------- | ------------------------------------------------------------ |
| text-color      | \<color>          | -             | No        | Text color of the selector.                                  |
| font-size       | \<length>         | -             | No        | Font size of the selector.                                   |
| allow-scale     | boolean          | true          | No        | Whether the font size changes with the system's font size settings.NOTE:If the **config-changes** tag of **fontSize** is configured for abilities in the **config.json** file, the setting takes effect without application restart. |
| letter-spacing  | \<length>         | 0             | No        | Letter spacing of the selector. For details, see [letter-spacing](js-components-basic-text.md#section5775351116) of the **text** component. |
| text-decoration | string           | -             | No        | Text decoration of the selector. For details, see [text-decoration](js-components-basic-text.md) of the **text** component. |
| font-style      | string           | normal        | No        | Font style of the selector. For details, see [font-style](js-components-basic-text.md) of the **text** component. |
| font-weight     | number \| string | normal        | No        | Font weight of the selector. For details, see [font-weight](js-components-basic-text.md) of the **text** component. |
| font-family     | string           | sans-serif    | No        | Font family, in which fonts are separated by commas (,). Each font is set using a font name or font family name. The first font that exists in the system or the font specified by [Custom Font Styles](js-components-common-customizing-font.md) in the family is selected as the font for the text. |
| line-height     | \<length>         | 0px           | No        | Text line height of the selector.                            |
| column-height5+ | \<length>         | -             | No        | Height of the selector option list.                          |

## Events

In addition to the events in [Universal Events](js-components-common-events.md), the following events are supported.

### Common Selector



| Name   | Parameter                                        | Description                                                  |
| ------ | ------------------------------------------------ | ------------------------------------------------------------ |
| change | { newValue: newValue, newSelected: newSelected } | Triggered when a value is selected and the OK button is clicked in the displayed pop-up window. **newSelected** is the index. |
| cancel | -                                                | Triggered when the cancel button is clicked.                 |

### Date Selector



| Name   | Parameter                              | Description                                                  |
| ------ | -------------------------------------- | ------------------------------------------------------------ |
| change | { year: year, month: month, day: day } | Triggered when a value is selected and the OK button is clicked in the displayed pop-up window.NOTE:The value of **month** ranges from 0 (January) to 11 (December). 5+ |
| cancel | -                                      | Triggered when the cancel button is clicked.                 |

### Date and Time Selector



| Name   | Parameter                                                    | Description                                                  |
| ------ | ------------------------------------------------------------ | ------------------------------------------------------------ |
| change | { year: year, month: month, day: day, hour: hour, minute: minute} | Triggered when a value is selected and the OK button is clicked in the displayed pop-up window. |
| cancel | -                                                            | Triggered when the cancel button is clicked.                 |

### Time Selector



| Name   | Parameter                                        | Description                                                  |
| ------ | ------------------------------------------------ | ------------------------------------------------------------ |
| change | { hour: hour, minute: minute, [second: second] } | Triggered when a value is selected and the OK button is clicked in the displayed pop-up window. If **containsecond** is set to true, value contains seconds. |
| cancel | -                                                | Triggered when the cancel button is clicked.                 |

### Multi-Column Text Selector



| Name         | Parameter                                                    | Description                                                  |
| ------------ | ------------------------------------------------------------ | ------------------------------------------------------------ |
| change       | { newValue: [newValue1, newValue2, newValue3, …], newSelected:[newSelected1, newSelected2, newSelected3, …] } | Triggered when an item is selected and the OK button is clicked in the displayed pop-up window.<br/>-**newValue** is an array consisting of the values of the selected items.<br/>-**newSelected** is an array consisting of the indexes of the selected items. The lengths of **newValue** and **newSelected** are the same as the length of **range**. |
| columnchange | { column: column, newValue: newValue, newSelected: newSelected } | Triggered when the value of a column in the multi-column selector changes.<br/>-**column** indicates the column whose value has changed.<br/>-**newValue** indicates the selected value.<br/>-**newSelected** indicates the index of the selected value. |
| cancel       | -                                                            | Triggered when the cancel button is clicked.                 |

## Methods

In addition to the methods in [Universal Methods](js-components-common-methods.md), the following events are supported.



| Name | Parameter | Description          |
| ---- | --------- | -------------------- |
| show | -         | Displays the picker. |

## Example Code

```
<!-- xxx.hml -->
<div class="container">
  <select @change="selectChange">
        <option value="{{ item }}" for="item in selectList">
            {{ item }}
        </option>
  </select>
  <picker id="picker0" type="text" value="{{textvalue}}" selected="{{textselect}}" range="{{rangetext}}" onchange="textonchange"
    oncancel="textoncancel" class="pickertext"  "></picker>

  <picker id="picker1" type="date" value="{{datevalue}}" start="2002-2-5" end="2030-6-5" selected="{{dateselect}}" lunarswitch="true"
    onchange="dateonchange" oncancel="dateoncancel" class="pickerdate" show="false"></picker>

  <picker id="picker2" type="time" value="{{timevalue}}" containsecond="{{containsecond}}" selected="{{timeselect}}" hours="12"
    onchange="timeonchange" oncancel="timeoncancel" class="pickertime" show="false"></picker>

  <picker id="picker3" type="datetime" value="{{datetimevalue}}" selected="{{datetimeselect}}" hours="24" lunarswitch="true"
    onchange="datetimeonchange" oncancel="datetimeoncancel" class="pickerdatetime" show="false"></picker>

  <picker id="picker4" type="multi-text" value="{{multitextvalue}}" columns="3" range="{{multitext}}" selected="{{multitextselect}}"
    onchange="multitextonchange" oncancel="multitextoncancel" class="pickermuitl" show="false"></picker>
</div>
/* xxx.css */
.container {    
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
 picker{
  width:60%;
  height:80px;
  border-radius:20px;
  text-color:white;
  font-size:15px;
  background-color:#4747e3;
  margin-left:20%;
}
 select{
  background-color: #efecec;
  height: 50px;
  width: 60%;
  margin-left: 20%;
  margin-top: 300px;
  margin-bottom: 50px;
  font-size: 22px;
}
// xxx.js
import router from '@system.router';
import prompt from '@system.prompt';
export default {
  data: {    
    selectList:["text","data","time","datetime","multitext"],
    rangetext:['15', "20", "25"],    
    multitext:[["a", "b", "c"], ["e", "f", "g"], ["h", "i"], ["k", "l", "m"]],    
    textvalue:'default textvalue',    
    datevalue:'default datevalue',    
    timevalue:'default timevalue',    
    datetimevalue:'default datetimevalue',    
    multitextvalue:'default multitextvalue',    
    containsecond:true,    
    multitextselect:[1,2,0],    
    datetimeselect:'2012-5-6-11-25',    
    timeselect:'11:22:30',    
    dateselect:'2021-3-2',    
    textselect:'2'
  },
  selectChange(e){
        for(let i = 0;i<this.selectList.length;i++){
            if(e.newValue == this.selectList[i]){
                this.$element("picker"+i).show();
            }
        }
    },
  textonchange(e) {    
    this.textvalue = e.newValue;    
    prompt.showToast({ message:"text:"+e.newValue+",newSelected:"+e.newSelected })
  },
  textoncancel(e) {    
    prompt.showToast({ message:"text: textoncancel" })
  },
  dateonchange(e) {    
    this.datevalue = e.year + "-" + e.month + "-" + e.day;    
    prompt.showToast({ message:"date:"+e.year+"-"+(e.month+1)+"-"+e.day })
  },
  dateoncancel() {    
    prompt.showToast({ message:"date: dateoncancel" })
  },
  timeonchange(e) {    
    if(this.containsecond){        
      this.timevalue=e.hour+":"+e.minute+":"+e.second;        
      prompt.showToast({ message:"Time:" + e.hour + ":" + e.minute + ":" + e.second })
    } else {        
      this.timevalue=e.hour+":"+e.minute;        
      prompt.showToast({ message:"Time:" + e.hour + ":" + e.minute })
    }},
  timeoncancel() {    
    prompt.showToast({ message:"timeoncancel" })
  },
  datetimeonchange(e) {    
    this.datetimevalue=e.year+"-"+e.month+"-"+e.day+" "+e.hour+":"+e.minute;    
    prompt.showToast({ message:"Time:"+(e.month+1)+"-"+e.day+" "+e.hour+":"+e.minute })
  },
  datetimeoncancel() {    
    prompt.showToast({ message:"datetimeoncancel" })
  },
  multitextonchange(e) {    
    this.multitextvalue=e.newValue;    
    prompt.showToast({ message:"Multi-column text change" + e.newValue })
  },
  multitextoncancel() {    
    prompt.showToast({ message:"multitextoncancel" })
  },
  popup_picker() {    
    this.$element("picker_text").show();
  },
}
```

![img](figures/mmmm.gif)