반응형 전체 글177 [flutter] The method '+' was called on null. null safety check를 안해서 나오는 에러메시지입니다. Text(cart_prod_qty) 위를 아래와 같이 처리하시면 해결됩니다. Text(cart_prod_qty??'default value') https://stackoverflow.com/questions/56351386/a-non-null-string-must-be-provided-to-a-text-widget A non-null String must be provided to a Text widget I'm trying to add the option for the quantity to be adjusted but I get an error saying "A non-null String must be provided to a Text.. 2021. 10. 28. 이전 1 ··· 42 43 44 45 다음 반응형