原文:flutter報錯The type of the function literal can't be inferred because the literal has a block as its body.A value of type 'String?' can't be assigned to a variable of type 'String'.

flutter有一些報錯如下 The type of the function literal can t be inferred because the literal has a block as its body. Try adding an explicit type to the variable.dart top level function literal block A value ...

2021-09-12 01:10 0 185 推薦指數:

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C++ literal type

要區分 literalliteral-type這兩個不同的概念。 literal:文字量,10,3.14, true ,u8"123", L"好"這些東西。 literal-type: 參考http://en.cppreference.com/w/cpp/concept ...

Mon Mar 26 03:09:00 CST 2018 0 1400
 
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