array have data but use QJsonValue value = array.at(i); no content

bestmyf_001

why return information is QJsonValue(array,QJsonArray([{"group_id":240,"is_agree":1"}]))
QJsonArray array = data_value.toArray();
when I use "QJsonValue value = array.at(i);",value is null.

Christian Ehrlicher

Please provide a minimal, compilable example - you don't fill data_value anwhere in your snippets so why should it return anything?

ChrisW67

@bestmyf_001 Assuming that data_value is actually a QJsonArray... what is the value of i and how many elements are in the array? See QJsonArray::at()