[提问]pixmapLabel1->setPixmap(NULL);QImage::smoothScale:这句话会出现： Image is a null image [复制链接]

怎样屏蔽掉这个信息？

引用楼主kongfuziyue于2011-04-15 11:40发表的 pixmapLabel1->setPixmap(NULL);QImage::smoothScale:这句话会出现： Image is a null image :
怎样屏蔽掉这个信息？

pixmapLabel1->setPixmap(new QPixmap());试下这样 还有smoothScale函数是调整图片的大小，为了适应pixmapLabel1的大小

谢谢，一会试一下去

不行,运行结果：
In file included from form1.cpp:27:
form1.ui.h: In member function `virtual void Form1::changeLED()':
form1.ui.h:44: no matching function for call to `QLabel::setPixmap(QPixmap*&)'
/usr/lib/qt-3.1/include/qlabel.h:103: candidates are: virtual void
   QLabel::setPixmap(const QPixmap&)
make: *** [form1.o] Error 1
需要静态成员，我想只能从smoothScale函数入手了，让它不响应，怎么做呢？

引用第3楼kongfuziyue于2011-04-16 20:10发表的 回 1楼(wxj120bw) 的帖子 :
不行,运行结果：
In file included from form1.cpp:27:
form1.ui.h: In member function `virtual void Form1::changeLED()':
form1.ui.h:44: no matching function for call to `QLabel::setPixmap(QPixmap*&)'
/usr/lib/qt-3.1/include/qlabel.h:103: candidates are: virtual void
.......

你试下这样操作 QPixmap pixmap = new QPixmap(); pixmapLabel1->setPixmap(pixmap); 参数类型不匹配

谢谢您的回答，我还在找方法，你说的那个不行。。。
In file included from form1.cpp:27:
form1.ui.h: In member function `virtual void Form1::changeLED()':
form1.ui.h:44: conversion from `QPixmap*' to non-scalar type `QPixmap'
   requested
make: *** [form1.o] Error 1