1e41f4b71Sopenharmony_ci# DownloadFileButton
2e41f4b71Sopenharmony_ci
3e41f4b71Sopenharmony_ci下载文件按钮,通过点击该下载按钮,可以获取到当前应用在Download公共目录中所属的存储路径。
4e41f4b71Sopenharmony_ci
5e41f4b71Sopenharmony_ci
6e41f4b71Sopenharmony_ci> **说明:**
7e41f4b71Sopenharmony_ci>
8e41f4b71Sopenharmony_ci> 该组件从API Version 12开始支持。后续版本如有新增内容,则采用上角标单独标记该内容的起始版本。
9e41f4b71Sopenharmony_ci
10e41f4b71Sopenharmony_ci##  导入模块
11e41f4b71Sopenharmony_ci
12e41f4b71Sopenharmony_ci```
13e41f4b71Sopenharmony_ciimport { DownloadFileButton } from '@kit.ArkUI'
14e41f4b71Sopenharmony_ci```
15e41f4b71Sopenharmony_ci
16e41f4b71Sopenharmony_ci## 子组件
17e41f4b71Sopenharmony_ci
18e41f4b71Sopenharmony_ci19e41f4b71Sopenharmony_ci
20e41f4b71Sopenharmony_ci## 属性
21e41f4b71Sopenharmony_ci
22e41f4b71Sopenharmony_ci支持[通用属性](ts-universal-attributes-size.md)。
23e41f4b71Sopenharmony_ci
24e41f4b71Sopenharmony_ci## DownloadFileButton
25e41f4b71Sopenharmony_ci
26e41f4b71Sopenharmony_ciDownloadbutton(contentOptions?:DownloadContentOptions, styleOptions?:DownloadStyleOptions)
27e41f4b71Sopenharmony_ci
28e41f4b71Sopenharmony_ci下载文件按钮组件,默认显示图标和文字。
29e41f4b71Sopenharmony_ci
30e41f4b71Sopenharmony_ci**装饰器类型:**@Component
31e41f4b71Sopenharmony_ci
32e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 12开始,该接口支持在原子化服务中使用。
33e41f4b71Sopenharmony_ci
34e41f4b71Sopenharmony_ci**系统能力**: SystemCapability.ArkUI.ArkUI.Full
35e41f4b71Sopenharmony_ci
36e41f4b71Sopenharmony_ci**参数:**
37e41f4b71Sopenharmony_ci
38e41f4b71Sopenharmony_ci| 名称           | 类型                                                         | 必填 | 装饰器类型 | 说明                             |
39e41f4b71Sopenharmony_ci| -------------- | ------------------------------------------------------------ | ---- | ---------- | -------------------------------- |
40e41f4b71Sopenharmony_ci| contentOptions | [DownloadContentOptions](#downloadcontentoptions) | 否   | @State     | 创建包含指定元素内容的下载按钮。 |
41e41f4b71Sopenharmony_ci| styleOptions   | [DownloadStyleOptions](#downloadstyleoptions) | 否   | @State     | 创建包含指定元素样式的下载按钮。 |
42e41f4b71Sopenharmony_ci
43e41f4b71Sopenharmony_ci## DownloadContentOptions
44e41f4b71Sopenharmony_ci
45e41f4b71Sopenharmony_ci下载文件按钮中显示的内容。
46e41f4b71Sopenharmony_ci
47e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 12开始,该接口支持在原子化服务中使用。
48e41f4b71Sopenharmony_ci
49e41f4b71Sopenharmony_ci**系统能力**: SystemCapability.ArkUI.ArkUI.Full
50e41f4b71Sopenharmony_ci
51e41f4b71Sopenharmony_ci| 名称 | 类型                                                         | 必填 | 说明                                                         |
52e41f4b71Sopenharmony_ci| ---- | ------------------------------------------------------------ | ---- | ------------------------------------------------------------ |
53e41f4b71Sopenharmony_ci| icon | [DownloadIconStyle](#downloadiconstyle) | 否   | 设置下载按钮的图标风格<br/>不传入该参数表示没有图标,icon和text至少存在一个。 |
54e41f4b71Sopenharmony_ci| text | [DownloadDescription](#downloaddescription) | 否   | 设置下载按钮的文本描述<br/>不传入该参数表示没有文字描述,icon和text至少存在一个。 |
55e41f4b71Sopenharmony_ci
56e41f4b71Sopenharmony_ci## DownloadStyleOptions
57e41f4b71Sopenharmony_ci
58e41f4b71Sopenharmony_ci下载文件按钮中图标和文字的样式。
59e41f4b71Sopenharmony_ci
60e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 12开始,该接口支持在原子化服务中使用。
61e41f4b71Sopenharmony_ci
62e41f4b71Sopenharmony_ci**系统能力**: SystemCapability.ArkUI.ArkUI.Full
63e41f4b71Sopenharmony_ci
64e41f4b71Sopenharmony_ci| 名称            | 类型                                                         | 必填 | 说明                                                         |
65e41f4b71Sopenharmony_ci| --------------- | ------------------------------------------------------------ | ---- | ------------------------------------------------------------ |
66e41f4b71Sopenharmony_ci| iconSize        | Dimension                                                    | 否   | 下载控件上图标的尺寸。<br/>默认值:16vp                      |
67e41f4b71Sopenharmony_ci| layoutDirection | [DownloadLayoutDirection](#downloadlayoutdirection) | 否   | 下载控件上图标和文字分布的方向。<br/>默认值:DownloadLayoutDirection.HORIZONTAL |
68e41f4b71Sopenharmony_ci| fontSize        | Dimension                                                    | 否   | 下载控件上文字的尺寸。<br/>默认值:16fp                      |
69e41f4b71Sopenharmony_ci| fontStyle       | FontStyle                                                    | 否   | 下载控件上文字的样式。<br/>默认值:FontStyle.Normal          |
70e41f4b71Sopenharmony_ci| fontWeight      | number \| FontWeight \| string                               | 否   | 下载控件上文字粗细。<br/>默认值:FontWeight.Medium           |
71e41f4b71Sopenharmony_ci| fontFamily      | string \| Resource                                           | 否   | 下载控件上文字的字体。<br/>默认字体:'HarmonyOS Sans'        |
72e41f4b71Sopenharmony_ci| fontColor       | ResourceColor                                                | 否   | 下载控件上文字的颜色。<br/>默认值:#ffffffff                 |
73e41f4b71Sopenharmony_ci| iconColor       | ResourceColor                                                | 否   | 下载控件上图标的颜色。<br/>默认值:#ffffffff                 |
74e41f4b71Sopenharmony_ci| textIconSpace   | Dimension                                                    | 否   | 下载控件中图标和文字的间距。<br/>默认值:4vp                 |
75e41f4b71Sopenharmony_ci
76e41f4b71Sopenharmony_ci## DownloadIconStyle
77e41f4b71Sopenharmony_ci
78e41f4b71Sopenharmony_ci下载文件按钮中图标的风格。
79e41f4b71Sopenharmony_ci
80e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 12开始,该接口支持在原子化服务中使用。
81e41f4b71Sopenharmony_ci
82e41f4b71Sopenharmony_ci**系统能力**: SystemCapability.ArkUI.ArkUI.Full
83e41f4b71Sopenharmony_ci
84e41f4b71Sopenharmony_ci| 名称        | 值   | 说明                       |
85e41f4b71Sopenharmony_ci| ----------- | ---- | -------------------------- |
86e41f4b71Sopenharmony_ci| FULL_FILLED | 1    | 下载按钮展示填充样式图标。 |
87e41f4b71Sopenharmony_ci| LINES       | 2    | 下载按钮展示线条样式图标。 |
88e41f4b71Sopenharmony_ci
89e41f4b71Sopenharmony_ci
90e41f4b71Sopenharmony_ci
91e41f4b71Sopenharmony_ci## DownloadDescription
92e41f4b71Sopenharmony_ci
93e41f4b71Sopenharmony_ci下载按钮中文字的内容。
94e41f4b71Sopenharmony_ci
95e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 12开始,该接口支持在原子化服务中使用。
96e41f4b71Sopenharmony_ci
97e41f4b71Sopenharmony_ci**系统能力**: SystemCapability.ArkUI.ArkUI.Full
98e41f4b71Sopenharmony_ci
99e41f4b71Sopenharmony_ci| 名称                | 值   | 说明                             |
100e41f4b71Sopenharmony_ci| ------------------- | ---- | -------------------------------- |
101e41f4b71Sopenharmony_ci| DOWNLOAD            | 1    | 下载按钮的文字描述为“下载”。     |
102e41f4b71Sopenharmony_ci| DOWNLOAD_FILE       | 2    | 下载按钮的文字描述为“下载文件”。 |
103e41f4b71Sopenharmony_ci| SAVE                | 3    | 下载按钮的文字描述为“保存”。     |
104e41f4b71Sopenharmony_ci| SAVE_IMAGE          | 4    | 下载按钮的文字描述为“保存图片”。 |
105e41f4b71Sopenharmony_ci| SAVE_FILE           | 5    | 下载按钮的文字描述为“保存文件”。 |
106e41f4b71Sopenharmony_ci| DOWNLOAD_AND_SHARE  | 6    | 下载按钮的文字描述为“下载分享”。 |
107e41f4b71Sopenharmony_ci| RECEIVE             | 7    | 下载按钮的文字描述为“接收”。     |
108e41f4b71Sopenharmony_ci| CONTINUE_TO_RECEIVE | 8    | 下载按钮的文字描述为“继续接收”。 |
109e41f4b71Sopenharmony_ci
110e41f4b71Sopenharmony_ci
111e41f4b71Sopenharmony_ci
112e41f4b71Sopenharmony_ci## DownloadLayoutDirection
113e41f4b71Sopenharmony_ci
114e41f4b71Sopenharmony_ci下载文件按钮中图标和文字的排列方式。
115e41f4b71Sopenharmony_ci
116e41f4b71Sopenharmony_ci**原子化服务API:** 从API version 12开始,该接口支持在原子化服务中使用。
117e41f4b71Sopenharmony_ci
118e41f4b71Sopenharmony_ci**系统能力**: SystemCapability.ArkUI.ArkUI.Full
119e41f4b71Sopenharmony_ci
120e41f4b71Sopenharmony_ci| 名称       | 值   | 说明                                       |
121e41f4b71Sopenharmony_ci| ---------- | ---- | ------------------------------------------ |
122e41f4b71Sopenharmony_ci| HORIZONTAL | 0    | 下载控件上图标和文字分布的方向为水平排列。 |
123e41f4b71Sopenharmony_ci| VERTICAL   | 1    | 下载控件上图标和文字分布的方向为垂直排列。 |
124e41f4b71Sopenharmony_ci
125e41f4b71Sopenharmony_ci## 事件
126e41f4b71Sopenharmony_ci
127e41f4b71Sopenharmony_ci支持[通用事件](ts-universal-events-click.md)。
128e41f4b71Sopenharmony_ci
129e41f4b71Sopenharmony_ci##  示例
130e41f4b71Sopenharmony_ci
131e41f4b71Sopenharmony_ci```
132e41f4b71Sopenharmony_ciimport { picker } from '@kit.CoreFileKit';
133e41f4b71Sopenharmony_ciimport { BusinessError } from '@kit.BasicServicesKit';
134e41f4b71Sopenharmony_ciimport { DownloadFileButton, DownloadLayoutDirection } from '@kit.ArkUI';
135e41f4b71Sopenharmony_ci
136e41f4b71Sopenharmony_ci@Entry
137e41f4b71Sopenharmony_ci@Component
138e41f4b71Sopenharmony_cistruct Index {
139e41f4b71Sopenharmony_ci  build() {
140e41f4b71Sopenharmony_ci    Column() {
141e41f4b71Sopenharmony_ci      DownloadFileButton({
142e41f4b71Sopenharmony_ci        contentOptions: {
143e41f4b71Sopenharmony_ci          // icon: DownloadIconStyle.FULL_FILLED,
144e41f4b71Sopenharmony_ci          // text: DownloadDescription.DOWNLOAD
145e41f4b71Sopenharmony_ci        },
146e41f4b71Sopenharmony_ci        styleOptions: {
147e41f4b71Sopenharmony_ci          iconSize: '16vp',
148e41f4b71Sopenharmony_ci          layoutDirection: DownloadLayoutDirection.HORIZONTAL,
149e41f4b71Sopenharmony_ci          fontSize: '16vp',
150e41f4b71Sopenharmony_ci          fontStyle: FontStyle.Normal,
151e41f4b71Sopenharmony_ci          fontWeight: FontWeight.Medium,
152e41f4b71Sopenharmony_ci          fontFamily: 'HarmonyOS Sans',
153e41f4b71Sopenharmony_ci          fontColor: '#ffffffff',
154e41f4b71Sopenharmony_ci          iconColor: '#ffffffff',
155e41f4b71Sopenharmony_ci          textIconSpace: '4vp'
156e41f4b71Sopenharmony_ci        }
157e41f4b71Sopenharmony_ci      })
158e41f4b71Sopenharmony_ci        .backgroundColor('#007dff')
159e41f4b71Sopenharmony_ci        .borderStyle(BorderStyle.Dotted)
160e41f4b71Sopenharmony_ci        .borderWidth(0)
161e41f4b71Sopenharmony_ci        .borderColor('')
162e41f4b71Sopenharmony_ci        .borderRadius('24vp')
163e41f4b71Sopenharmony_ci        .position({ x: 0, y: 0 })
164e41f4b71Sopenharmony_ci        .markAnchor({ x: 0, y: 0 })
165e41f4b71Sopenharmony_ci        .offset({ x: 0, y: 0 })
166e41f4b71Sopenharmony_ci        .constraintSize({})
167e41f4b71Sopenharmony_ci        .padding({
168e41f4b71Sopenharmony_ci          top: '12vp',
169e41f4b71Sopenharmony_ci          bottom: '12vp',
170e41f4b71Sopenharmony_ci          left: '24vp',
171e41f4b71Sopenharmony_ci          right: '24vp'
172e41f4b71Sopenharmony_ci        })
173e41f4b71Sopenharmony_ci        .onClick(() => {
174e41f4b71Sopenharmony_ci          this.downloadAction();
175e41f4b71Sopenharmony_ci        })
176e41f4b71Sopenharmony_ci    }
177e41f4b71Sopenharmony_ci  }
178e41f4b71Sopenharmony_ci
179e41f4b71Sopenharmony_ci  downloadAction() {
180e41f4b71Sopenharmony_ci    try {
181e41f4b71Sopenharmony_ci      const document = new picker.DocumentSaveOptions();
182e41f4b71Sopenharmony_ci      document.pickerMode = picker.DocumentPickerMode.DOWNLOAD;
183e41f4b71Sopenharmony_ci      new picker.DocumentViewPicker().save(document, (err: BusinessError, result: Array<string>) => {
184e41f4b71Sopenharmony_ci        if (err) {
185e41f4b71Sopenharmony_ci          return;
186e41f4b71Sopenharmony_ci        }
187e41f4b71Sopenharmony_ci        console.info(`downloadAction result:  ${JSON.stringify(result)}`);
188e41f4b71Sopenharmony_ci      });
189e41f4b71Sopenharmony_ci    } catch (e) {
190e41f4b71Sopenharmony_ci    }
191e41f4b71Sopenharmony_ci  }
192e41f4b71Sopenharmony_ci}
193e41f4b71Sopenharmony_ci```
194e41f4b71Sopenharmony_ci
195e41f4b71Sopenharmony_ci![zh-cn_image_0000001643320073](figures/zh-cn_image_0000001643320073.png)
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