32 lines
1002 B
TypeScript
32 lines
1002 B
TypeScript
import { isHttpImageUrl } from '@dukang/weixin-sdk';
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import { toastSuccess } from './toast';
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import { isWechatEnv, weixinSdk } from './weixin';
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export { isHttpImageUrl };
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export function blobToDataUrl(blob: Blob): Promise<string> {
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.onload = () => resolve(String(reader.result || ''));
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reader.onerror = () => reject(new Error('读取图片失败'));
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reader.readAsDataURL(blob);
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});
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}
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/**
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* 微信内用 previewImage 打开可公网访问的图片，用户长按即可保存。
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* blob / data URL 不能走该接口。
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*/
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export async function previewSaveableImage(url: string): Promise<boolean> {
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const href = url.trim();
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if (!isWechatEnv() || !isHttpImageUrl(href)) return false;
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try {
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await weixinSdk.previewImage(href);
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toastSuccess('请长按图片保存到相册');
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return true;
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} catch {
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toastSuccess('请长按上方图片保存到相册');
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return false;
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}
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}
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