# TrendArrow 指標趨勢

### 介紹

帶有箭頭指示的百分比數字,用以展示指標趨勢

### 安裝

```tsx
// React
import { TrendArrow } from '@nutui/nutui-react-native';
```

## 代碼演示

### 基礎用法

:::demo

```tsx
import  React from "react"
import { TrendArrow, Cell } from '@nutui/nutui-react-native'

const App = () => {
  return (
    <Cell>
        <TrendArrow syncTextColor={false} rate={1} />
        <TrendArrow syncTextColor={false} rate={-0.2535} />
    </Cell>
  );
};
export default App;
```

:::

### 改變文字顏色

:::demo

```tsx
import  React from "react"
import { TrendArrow, Cell } from '@nutui/nutui-react-native'

const App = () => {
  return (
    <Cell>
        <TrendArrow rate={10.2365} />
        <TrendArrow rate={-0.2535} />
    </Cell>
  );
};
export default App;
```

:::

### 指定小數位

:::demo

```tsx
import  React from "react"
import { TrendArrow, Cell } from '@nutui/nutui-react-native'

const App = () => {
  return (
     <Cell>
        <TrendArrow digits={1} rate={10.2365} />
        <TrendArrow digits={3} rate={-0.2535} />
    </Cell>
  );
};
export default App;
```

:::

### 箭頭在前面

:::demo

```tsx
import  React from "react"
import { TrendArrow, Cell } from '@nutui/nutui-react-native'

const App = () => {
  return (
    <Cell>
        <TrendArrow arrowLeft rate={0.2535} />
        <TrendArrow arrowLeft rate={-0.2535} />
    </Cell>
  );
};
export default App;
```

:::

### 顯示正負號

:::demo

```tsx
import  React from "react"
import { TrendArrow, Cell } from '@nutui/nutui-react-native'

const App = () => {
  return (
    <Cell>
        <TrendArrow showSign rate={1} />
        <TrendArrow showSign rate={-0.2535} />
    </Cell>
  );
};
export default App;
```

:::

### 是否展示 0

:::demo

```tsx
import  React from "react"
import { TrendArrow, Cell } from '@nutui/nutui-react-native'

const App = () => {
  return (
    <Cell>
        <TrendArrow showSign rate={0} />
        <TrendArrow showSign showZero rate={0} />
    </Cell>
  );
};
export default App;
```

:::

### 自定義顏色

:::demo

```tsx
import  React from "react"
import { TrendArrow, Cell } from '@nutui/nutui-react-native'

const App = () => {
  return (
    <Cell>
        <TrendArrow rate={10.2365} riseColor="rgb(73,143,242)" />
        <TrendArrow rate={-0.2535} showSign dropColor="rgb(255, 190, 13)" />
        <TrendArrow
        syncTextColor={false}
        rate={-0.2535}
        showSign
        textColor="rgb(39,197,48)"
        dropColor="rgb(39,197,48)"
        />
    </Cell>
  );
};
export default App;
```

:::

### 自定義圖標

:::demo

```tsx
import  React from "react"
import { TrendArrow, Cell, Icon } from '@nutui/nutui-react-native'

const App = () => {
  return (
    <Cell>
        <TrendArrow rate={10.2365} upIconName="success" />
        <TrendArrow rate={-10.2365} downIconName="failure" />
        <TrendArrow rate={10.2365}>
        <Icon name="heart-fill" color="#fa2c19" size={12} />
        </TrendArrow>
    </Cell>
  );
};
export default App;
```

:::

## API

### Props

| 參數          | 說明                                       | 類型    | 默認值          |
| ------------- | ------------------------------------------ | ------- | --------------- |
| rate          | 數值，大於 0 時箭頭向上，小於 0 時箭頭向下 | Number  | -               |
| digits        | 小數位精度                                 | Number  | 2               |
| showSign      | 是否顯示加減號                             | Boolean | false           |
| showZero      | 是否顯示 0                                 | Boolean | false           |
| arrowLeft     | 是否在數字左側顯示箭頭                     | Boolean | false           |
| syncTextColor | 文字顏色是否與箭頭同步                     | Boolean | true            |
| textColor     | 文字顏色                                   | String  | '#333333'       |
| riseColor     | 向上箭頭顏色                               | String  | '#fa2c19'       |
| dropColor     | 向下箭頭顏色                               | String  | 『#64b578』     |
| iconSize      | 箭頭大小                                   | String  | '12px'          |
| upIconName    | 自定義向上箭頭 icon                        | String  | 'triangle-up'   |
| downIconName  | 自定義向下箭頭 icon                        | String  | 'triangle-down' |

## 主題定制

### 樣式變量

組件提供了下列 CSS 變量，可用於自定義樣式，使用方法請參考 [ConfigProvider 組件](#/zh-CN/component/configprovider)。

| 名稱                                  | 默認值 |
| ------------------------------------- | ------ |
| --nutui-trendarrow-font-size          | ` 14`  |
| --nutui-trendarrow-before-icon-margin | `  4`  |
| --nutui-trendarrow-font-size          | ` 14`  |
| --nutui-trendarrow-before-icon-margin | `  4`  |