鸿蒙 从相册或者相机选择图片

从相册获取：

getAlbum() {
const photoSelectOptions = new photoAccessHelper.PhotoSelectOptions();
photoSelectOptions.MIMEType = photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE; // 过滤选择媒体文件类型为IMAGE
photoSelectOptions.maxSelectNumber = 5; // 选择媒体文件的最大数目
let uris: Array<string> = [];
const photoViewPicker = new photoAccessHelper.PhotoViewPicker();
photoViewPicker.select(photoSelectOptions).then((photoSelectResult: photoAccessHelper.PhotoSelectResult) => {
uris = photoSelectResult.photoUris;
uris.forEach(element => {
this.photoList.push(element)
});
console.info('photoViewPicker.select to file succeed and uris are:' + uris);
}).catch((err: BusinessError) => {
console.error(`Invoke photoViewPicker.select failed, code is ${err.code}, message is ${err.message}`);
})
}

从相机获取：

 invokeCamera(callback: (uri: string) => void) {try {let pickerProfile: cameraPicker.PickerProfile = {cameraPosition: camera.CameraPosition.CAMERA_POSITION_BACK};let pickerResult: cameraPicker.PickerResult = await cameraPicker.pick(getContext(),[cameraPicker.PickerMediaType.PHOTO, cameraPicker.PickerMediaType.VIDEO], pickerProfile);console.log("the pick pickerResult is:" + JSON.stringify(pickerResult));if (callback && pickerResult) {callback(pickerResult.resultUri);}} catch (error) {let err = error as BusinessError;console.error(`the pick call failed. error code: ${err.code}`);}}