# react-native-picker
[](https://www.npmjs.com/package/react-native-picker) 
A Native Picker with high performance.
pure javascript version -> [v3.0.5](https://github.com/beefe/react-native-picker/tree/pure-javascript-version)
###Documentation
####Props
- pickerConfirmBtnText string, 确认按钮文字
- pickerCancelBtnText string, 取消按钮文字
- pickerTitleText string, 标题文字
- pickerConfirmBtnColor [1, 186, 245, 1], 确认按钮字体颜色
- pickerCancelBtnColor [1, 186, 245, 1], 取消按钮字体颜色
- pickerTitleColor [20, 20, 20, 1], 标题字体颜色
- pickerToolBarBg [232, 232, 232, 1], 工具栏背景颜色
- pickerBg [196, 199, 206, 1], picker背景颜色
- pickerData 数组或对象，picker数据
- selectedValue string，默认选中数据
- onPickerConfirm function，确认按钮回调
- onPickerCancel function，取消按钮回调
- onPickerSelect function，滚轮滚动时回调
####Methods
- toggle show or hide picker, default to be hiden
- show show picker
- hide hide picker
- isPickerShow get status of picker, return a boolean
###Usage
####Step 1 - install
```
npm install react-native-picker --save
```
####Step 2 - link
```
react-native link
```
####Step 3 - import and use in project
```javascript
import Picker from 'react-native-picker';
let data = [];
for(var i=0;i<100;i++){
data.push(i);
}
Picker.init({
pickerData: data,
selectedValue: [59],
onPickerConfirm: data => {
console.log(data);
},
onPickerCancel: data => {
console.log(data);
},
onPickerSelect: data => {
console.log(data);
}
});
Picker.show();
```
###Notice
####support two modes:
1. parallel: such as time picker, wheels have no connection with each other
2. cascade: such as date picker, address picker .etc, when front wheel changed, the behind wheels will all be reset
####parallel:
- single wheel:
```javascript
pickerData = [1,2,3,4];
selectedValue = 3;
```
- two or more wheel:
```javascript
pickerData = [
[1,2,3,4],
[5,6,7,8],
...
];
selectedValue = [1, 5];
```
####cascade:
- two wheel
```javascript
pickerData = [
{
a: [1, 2, 3, 4]
},
{
b: [5, 6, 7, 8]
},
...
];
selectedValue = ['a', 2];
```
- three wheel
```javascript
pickerData = [
{
a: [
{
a1: [1, 2, 3, 4]
},
{
a2: [5, 6, 7, 8]
},
{
a3: [9, 10, 11, 12]
}
]
},
{
b: [
{
b1: [11, 22, 33, 44]
},
{
b2: [55, 66, 77, 88]
},
{
b3: [99, 1010, 1111, 1212]
}
]
},
{
c: [
{
c1: ['a', 'b', 'c']
},
{
c2: ['aa', 'bb', 'cc']
},
{
c3: ['aaa', 'bbb', 'ccc']
}
]
},
...
]
```