flutter报错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'.

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flutter有一些报错如下

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 of type 'String?' can't be assigned to a variable of type 'String'. Try changing the type of the variable, or casTing the right-hand type to 'String'.

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 of type 'StatefulWidget Function(dynamiC)?' can't be assigned to a variable of type 'Function'. Try changing the type of the variable, or casTing the right-hand type to 'Function'.

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.

解决方案

// final String name = setTings.name;
final String? name = setTings.name;
// final Function pageContentBuilder = routes[name];
final Function pageContentBuilder = routes[name] as Function;

大佬总结

以上是大佬教程为你收集整理的flutter报错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'.全部内容，希望文章能够帮你解决flutter报错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'.所遇到的程序开发问题。

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