我有8个ComboBox,标签为channel_1 ... channel_8。
我想检查用户是否在其中2个中选择了相同的选项,除了第一个选项'none'。
我已创建此广告位,但无法识别创建的final_a
和final_b
变量。
// Slot to check if there's two channels with the same option choosed
void gui::check_channels_options()
{
for (int a = 1; a <= 8; a++)
{
for (int b = 1; b <= 8; b++)
{
if(a != b)
{
QString A, B;
A.setNum(a);
B.setNum(b);
QString Na, Nb;
Na = "channel_";
Na += A;
Nb = "channel_";
Nb += B;
QByteArray bytes_a = Na.toAscii();
char* final_a = bytes_a.data();
QByteArray bytes_b = Nb.toAscii();
char* final_b = bytes_b.data();
if((ui->final_a->currentText() == ui->final_b->currentText()) &&
(ui->final_a->currentIndex() != 0 && ui->fnal_b->currentIndex() != 0))
{
QMessageBox::warning(this,"Error","Channel " + a + " has the same option as channel " + b,QMessageBox::Ok);
}
else
{
}
}
}
}
}
任何人都可以帮助我吗?
答案 0 :(得分:1)
您在堆栈上声明final_a
和final_b
,但随后将其称为ui->final_a
和ui->final_b
。尝试从中删除“ui->
”。
总的来说,我认为您的方法可以简化。例如,假设您有指向存储在名为comboBoxes
的数组中的组合框的指针。然后你可以这样做:
// create the combo boxes somewhere in your program, perhaps like this:
QComboBox *comboBoxes[8];
for (int i = 0; i < 8; ++i)
{
comboBoxes[i] = new QComboBox;
}
// Slot to check if there's two channels with the same option choosed
void gui::check_channels_options()
{
for (int a = 0; a < 8; ++a)
{
for (int b = 0; b < 8; ++b)
{
if (a == b ||
comboBoxes[a]->currentText() == "none" ||
comboBoxes[b]->currentText() == "none")
continue; // no need to test these for equality
else if (comboBoxes[a]->currentText() == comboBoxes[b]->currentText)
// issue warning
else
// they are OK
}
}
}
答案 1 :(得分:0)
ui-&gt; final_a-&gt; currentText(),我不认为你可以通过这种方式访问UI元素。 UI中没有* final_a *元素,但我知道会有一些channel_1,channel2元素。
ps:请给变量一个有意义的名字,