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ui->tableWidget->horizontalHeader()->setSectionResizeMode(0, QHeaderView::ResizeToContents);
ui->tableWidget->horizontalHeader()->setSectionResizeMode(1, QHeaderView::Stretch);

视频:http: //youtu.be/KBpf9oLxOq4

如何调整所有字符串的大小?

编辑:ui->tableWidget->resizeColumnToContents(0);

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