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src/utils/common.ts

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+/**
+ * 图片转Base64
+ */
+function getBase64(file: File): Promise<string | ArrayBuffer | null> {
+    return new Promise((resolve, reject) => {
+        const reader = new FileReader();
+        reader.readAsDataURL(file);
+        reader.onload = () => resolve(reader.result);
+        reader.onerror = error => reject(error);
+    });
+}
+/**
+ * 预览图片
+ */
+export async function previewCover(file: any): Promise<string> {
+    if (!file.url && !file.preview) {
+        file.preview = await getBase64(file.originFileObj);
+    }
+    return file.url || file.preview || '';
+}
+
+/**
+ * 存储对应key
+ * @param key 键值
+ * @param value 内容 object自动序列化
+ */
+
+export function saveValue(key: string, value: any): boolean{
+    if(typeof value == 'object'){
+        value = JSON.stringify(value)
+    }
+    try {
+        localStorage.setItem(key, value);
+        return true;
+    } catch (error) {
+        return false;
+    }
+
+}
+
+/**
+ * 获取对应key
+ * @param key 键值
+ */
+export function getValue(key: string): any{
+    let value = localStorage.getItem(key);
+    if(value != null){
+        try {
+            value = JSON.parse(value);
+        } catch (error) {
+            return value;
+        }
+    }
+    return value;
+}