Flutter報錯The argument type 'Future< String>' can't be assigned to the parameter type 'String'.
返回值的類型錯誤，解決辦法主要有兩種，第一種使用async和await，第二種時直接使用futures， 第一種示例web Future<Void> printDailyNewsDigest() async {
String news = await gatherNewsReports();
print(news);
} 第二種只須要指定回調，在回調中進行處理async void prin
相關文章
- 1. TypeError [ERR_INVALID_ARG_TYPE]: The 「path「 argument must be of type string
- 2. - String cannot be resolved to a type - The method getServerName() from the type ServletRequest
- 3. 泛型錯誤 The type parameter 'T' cannot be used with the 'as' operator
- 4. Eclipse報錯 ： String cannot be resolved to a type
- 5. MyEclipse報錯：String cannot be resolved to a type
- 6. The type org.junit.runners.BlockJUnit4ClassRunner cannot be resolved. It is(報錯)
- 7. The type of the expression must be an array type but it resolved to Object？
- 8. The Ultimate Guide to Python Type Checking
- 9. TypeError [ERR_INVALID_ARG_TYPE]: The first argument must be one of type string or Buffer.
- 10. (type interface {}) to type string
- 更多相關文章...
- • ASP Type 屬性 - ASP 教程
- • ASP Type 屬性 - ASP 教程
- • 爲了進字節跳動，我精選了29道Java經典算法題，帶詳細講解
- • C# 中 foreach 遍歷的用法
相關標籤/搜索
每日一句
-
每一个你不满意的现在，都有一个你没有努力的曾经。
歡迎關注本站公眾號,獲取更多信息
相關文章
- 1. TypeError [ERR_INVALID_ARG_TYPE]: The 「path「 argument must be of type string
- 2. - String cannot be resolved to a type - The method getServerName() from the type ServletRequest
- 3. 泛型錯誤 The type parameter 'T' cannot be used with the 'as' operator
- 4. Eclipse報錯 ： String cannot be resolved to a type
- 5. MyEclipse報錯：String cannot be resolved to a type
- 6. The type org.junit.runners.BlockJUnit4ClassRunner cannot be resolved. It is(報錯)
- 7. The type of the expression must be an array type but it resolved to Object？
- 8. The Ultimate Guide to Python Type Checking
- 9. TypeError [ERR_INVALID_ARG_TYPE]: The first argument must be one of type string or Buffer.
- 10. (type interface {}) to type string