HarmonyOS 鸿蒙Next PhotoPickerComponent拍照后缩略图界面不展示内容
HarmonyOS 鸿蒙Next PhotoPickerComponent拍照后缩略图界面不展示内容
拍照完成后在缩略图的界面不显示任何内容,PhotoPickerComponent是不支持这样配置吗?
import {
PhotoPickerComponent,
PickerController,
PickerOptions,
SelectMode
} from ‘@ohos.file.PhotoPickerComponent’;
import { photoAccessHelper } from ‘@kit.MediaLibraryKit’;
@Entry
@Component
struct Index {
context = getContext(this);
pickerOptions = new PickerOptions();
@State pickerController: PickerController = new PickerController()
aboutToAppear(): void {
this.pickerOptions.isSearchSupported = false;
this.pickerOptions.selectMode = SelectMode.SINGLE_SELECT;
this.pickerOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
this.pickerOptions.isPreviewForSingleSelectionSupported = false;
this.pickerOptions.isPhotoTakingSupported = true;
}
@Builder
previewPhoto() {
PhotoPickerComponent({
pickerOptions: this.pickerOptions,
pickerController: this.pickerController,
})
}
build() {
Column() {
this.previewPhoto()
}
}
}
为了你的关注,拼了
试试这个:
import {
PhotoPickerComponent,
PickerController,
PickerOptions,
SelectMode
} from '@ohos.file.PhotoPickerComponent';
import { photoAccessHelper } from '@kit.MediaLibraryKit';
import image from '@ohos.multimedia.image';
import fs from '@ohos.file.fs';
@Styles
function imageStyle() {
.objectFit(ImageFit.Cover)
.borderRadius(8)
}
@Component
struct CustomImagePreview {
@Prop uri: string
@State imagePixelMap: image.PixelMap | null = null
async aboutToAppear() {
try {
// 异步加载图片
const imageSource = await image.createImageSource(this.uri);
this.imagePixelMap = await imageSource.createPixelMap({
desiredSize: {
width: 500,
height: 500
}
});
} catch (error) {
console.error('Load image failed', error);
}
}
build() {
Stack() {
if (this.imagePixelMap) {
Image(this.imagePixelMap)
.width('100%')
.height('100%')
.imageStyle()
} else {
Text('图片加载中...')
.fontSize(14)
.fontColor(Color.Gray)
}
}
.width('100%')
.height(300)
.backgroundColor(Color.Black)
}
}
@Entry
@Component
struct Index {
context = getContext(this);
pickerOptions: PickerOptions = new PickerOptions();
@State pickerController: PickerController = new PickerController();
// 存储选择的图片URI数组
@State selectedUris: string[] = [];
// 当前预览图片索引
@State currentPreviewIndex: number = 0;
// 是否显示预览
@State isPreviewVisible: boolean = false;
aboutToAppear(): void {
// 配置选项
this.pickerOptions.isSearchSupported = false;
// 支持多选
this.pickerOptions.selectMode = SelectMode.MULTI_SELECT;
this.pickerOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
// 关闭系统预览
this.pickerOptions.isPreviewForSingleSelectionSupported = false;
this.pickerOptions.isPhotoTakingSupported = true;
}
// 自定义预览方法
private previewImage(index: number) {
this.currentPreviewIndex = index;
this.isPreviewVisible = true;
}
// 关闭预览
private closePreview() {
this.isPreviewVisible = false;
}
build() {
Stack({ alignContent: Alignment.Bottom }) {
Column() {
// 照片选择组件
PhotoPickerComponent({
pickerOptions: this.pickerOptions,
pickerController: this.pickerController,
onSelect: (selectResult) => {
if (selectResult && selectResult.length > 0) {
// 存储所有选择的图片URI
this.selectedUris = selectResult.map(item => item.uri);
}
},
onCancel: () => {
console.log('Photo selection cancelled');
}
})
// 自定义缩略图列表
if (this.selectedUris.length > 0) {
Scroll() {
Row() {
ForEach(this.selectedUris, (uri: string, index: number) => {
Image(uri)
.width(100)
.height(100)
.margin(5)
.borderRadius(8)
.onClick(() => this.previewImage(index))
})
}
}
.scrollable(ScrollDirection.Horizontal)
.scrollBar(BarState.Off)
}
}
.width('100%')
.height('100%')
// 自定义全屏预览
if (this.isPreviewVisible) {
Stack({ alignContent: Alignment.TopEnd }) {
CustomImagePreview({ uri: this.selectedUris[this.currentPreviewIndex] })
Button('关闭')
.position({ x: '90%', y: 50 })
.onClick(() => this.closePreview())
}
.width('100%')
.height('100%')
.backgroundColor(Color.Black)
}
}
}
}
有点小糊涂,试试这个,可以增加一些功能:
import {
PhotoPickerComponent,
PickerController,
PickerOptions,
SelectMode
} from '@ohos.file.PhotoPickerComponent';
import { photoAccessHelper } from '@kit.MediaLibraryKit';
@Entry
@Component
struct Index {
context = getContext(this);
// 完整的Picker配置
pickerOptions: PickerOptions = new PickerOptions();
@State pickerController: PickerController = new PickerController();
// 用于存储选择的图片URI
@State selectedUri: string = '';
aboutToAppear(): void {
// 详细的配置
this.pickerOptions.isSearchSupported = false;
this.pickerOptions.selectMode = SelectMode.SINGLE_SELECT;
this.pickerOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
// 重要:启用预览和拍照
this.pickerOptions.isPreviewForSingleSelectionSupported = true;
this.pickerOptions.isPhotoTakingSupported = true;
}
build() {
Column() {
// 使用PhotoPickerComponent并添加onSelect回调
PhotoPickerComponent({
pickerOptions: this.pickerOptions,
pickerController: this.pickerController,
// 关键:添加onSelect回调
onSelect: (selectResult) => {
if (selectResult && selectResult.length > 0) {
// 存储选择的图片URI
this.selectedUri = selectResult[0].uri;
// 可选:打印选择的图片信息
console.log('Selected Image URI:', this.selectedUri);
}
},
// 可选:添加其他回调
onCancel: () => {
console.log('Photo selection cancelled');
}
})
// 可选:显示选择的图片
if (this.selectedUri) {
Image(this.selectedUri)
.width(200)
.height(200)
.margin(10)
}
}
}
}
我需要关闭PhotoPickerComponent的预览功能自己实现只保留PhotoPickerComponent查看相册缩略图和拍照的功能
试下我的代码:
import {
PhotoPickerComponent,
PickerController,
PickerOptions,
SelectMode
} from '[@ohos](/user/ohos).file.PhotoPickerComponent';
import { photoAccessHelper } from '[@kit](/user/kit).MediaLibraryKit';
[@Entry](/user/Entry)
[@Component](/user/Component)
struct Index {
context = getContext(this);
pickerOptions = new PickerOptions();
[@State](/user/State) pickerController: PickerController = new PickerController()
[@State](/user/State) selectedUri: string = ''
aboutToAppear(): void {
this.pickerOptions.isSearchSupported = false;
this.pickerOptions.selectMode = SelectMode.SINGLE_SELECT;
this.pickerOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
this.pickerOptions.isPreviewForSingleSelectionSupported = true; // 修改为 true
this.pickerOptions.isPhotoTakingSupported = true;
}
// 添加一个方法来触发照片选择或拍照
openPhotoPicker() {
this.pickerController.select((err, result) => {
if (!err && result && result.length > 0) {
this.selectedUri = result[0].uri;
}
});
}
build() {
Column() {
Button('选择/拍照')
.onClick(() => this.openPhotoPicker())
if (this.selectedUri) {
Image(this.selectedUri)
.width(200)
.height(200)
}
PhotoPickerComponent({
pickerOptions: this.pickerOptions,
pickerController: this.pickerController,
})
}
}
}
pickerController上没有select方法吧, 我代码中提供的options配置不需要更改,并且也不需要单独提供按钮来出发选择或者拍照,只需要使用PhotoPickerComponent提供的能力,不然的话应该是无法复现我所遇到的情况
找HarmonyOS工作还需要会Flutter的哦,有需要Flutter教程的可以学学大地老师的教程,很不错,B站免费学的哦:https://www.bilibili.com/video/BV1S4411E7LY/?p=17
是指这个缩略图吗?我使用你的代码拍照之后,缩略图正常的,本来只有一个图片,拍照之后,增加了一个,所以会不会是系统版本问题,我手机系统是5.0.0.107版本
找HarmonyOS工作还需要会Flutter的哦,有需要Flutter教程的可以学学大地老师的教程,很不错,B站免费学的哦:https://www.bilibili.com/video/BV1S4411E7LY/?p=17
我的是5.0.0.102
那可以升级下
针对HarmonyOS 鸿蒙Next中PhotoPickerComponent拍照后缩略图界面不展示内容的问题,作为IT专家,这里提供一些可能的原因及解决方案:
- 系统兼容性问题:确保您的设备已升级到HarmonyOS的最新版本,部分软件可能还在适配鸿蒙Next的新系统架构,导致显示异常。
- 权限设置问题:检查相机和相册应用的权限设置是否完整,确保PhotoPickerComponent有足够的权限访问相机和存储。
- 组件使用问题:确认PhotoPickerComponent的使用流程和方法是否正确,如创建相机实例、获取输出流、调用预览功能等步骤是否遵循官方文档指导。特别是
isPreviewForSingleSelectionSupported
属性,如果设置为false
,则单选模式下不支持预览。 - 缓存或冲突问题:尝试重启设备或清除相机及相册应用的缓存,同时检查是否有第三方应用冲突或影响。
如果问题依旧没法解决请联系官网客服,官网地址是:https://www.itying.com/category-93-b0.html 。