标题:用setpixmap画360*360的图，程序崩溃了。
作者:q834081342
日期:2016-03-25 20:28
内容:
用setpixmap在Qlabel中画图，画359*359还能正常显示，360*360就崩溃了。
新手刚开始学，望各位大侠不吝赐教，谢谢。下面是代码：
#include "widget.h"
#include "ui_widget.h"
#include
#include
const int ovSize = 359;
unsigned int ovArea = ovSize * ovSize;
unsigned int *pImage = (unsigned int*)malloc(ovArea*sizeof(unsigned int));
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
timer = new QTimer(this);
connect(timer, SIGNAL(timeout()) , this, SLOT(updateNomal()));
}
Widget::~Widget()
{
delete ui;
}
void Widget::on_pushButton_clicked()
{
timer->start(500);
}
void Widget::updateNomal()
{
for (unsigned int i = 0; i < ovArea; ++i)
{
unsigned char *pb=(unsigned char *)(pImage+i);
pImage[i] = 0;
pb[0] = 85;
pb[1] = 85;
pb[2] = 85;
}
QByteArray imageByteArray = QByteArray( (const char*)pImage,ovArea*4 );
uchar*transData = (unsigned char*)imageByteArray.data();
QImage image = QImage(transData, ovSize, ovSize, QImage::Format_RGB32);
ui->label->setPixmap(QPixmap::fromImage(image));
}