How to use resource properly

Question

When i use resorce it crash my program have no idea how to fix it. Name of resource Resource.grc, name of prefix /imag, name of picture srce_sedam_one.jpg. Everything else work fine.

QPixmap pixmap1 = QPixmap (":/imag/srce_sedam_one.jpg");
QMap<int, QPixmap> map;
map.insert(4, pixmap1);
ui->label_no->setPixmap(map.value(4));

where does it crash your program? What do you get when you run it inside a debugger? — UmNyobe, Sep 02 '14 at 13:02
Are you sure it's not `ui->label_no->setPixmap(map.value(4));` that is crashing? Are you calling this before or after `ui->setupUi(this);`? — thuga, Sep 02 '14 at 13:15
-1 because you didn't post the code that actually caused the problem. Minimal test cases: learn them, use them.\ — Kuba hasn't forgotten Monica, Sep 03 '14 at 17:03

Jablonski · Accepted Answer · 2014-09-02T13:59:11.390

Add in your pro-file and rebuild all.

RESOURCES += \
    icons.qrc

icons.qrc is in my case, you should use your filename. Resource.qrc

Then call after ui->setupUi(this);

ui->setupUi(this); 

QPixmap pixmap1 = QPixmap (":/imag/srce_sedam_one.jpg");
QMap<int, QPixmap> map;
map.insert(4, pixmap1);
ui->label_no->setPixmap(map.value(4));

You app crashes because: ui->setupUi(this) create all your widgets which you put in Qt Designer. And when you call ui->label_no before setupUi, you use null pointer and get crash.

How to use resource properly

1 Answers1