这是我在这里发表的第一篇文章,我没有在任何地方看到它,所以希望它没问题。我试图通过键盘点击更改显示的图像(想想幻灯片)。到目前为止,这是我的代码:
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel
from PyQt5.QtGui import QPixmap
from PyQt5.QtCore import Qt
import os
class App(QWidget):
def __init__(self):
super().__init__()
self.title = 'Document Analysis'
self.left = 30
self.top = 30
self.width = 640
self.height = 480
self.imagenumber=0
self.initUI()
def keyPressEvent(self, event):
key=event.key()
if key==Qt.Key_Right:
self.imagenumber=self.imagenumber+1
self.showimage(self.imagenumber)
self.show()
else:
super(self).keyPressEvent(event)
def initUI(self):
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
self.showimage(0)
self.show()
def showimage(self,imagenumber):
label = QLabel(self)
directory = "C:\\Desktop\\Pictures"
imagelist = os.listdir(directory)
pixmap = QPixmap(directory + '\\' + imagelist[imagenumber])
label.setPixmap(pixmap)
self.resize(pixmap.width() + 500, pixmap.height())
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())
似乎有点像某个地方,第一个图像显示得很好,我知道imagenumber确实发生了变化,当我停止显示它时,它会调整窗口大小,但仍然没有显示图像。关于我做错了什么的建议?
这是一个较大项目的一部分,这是图片侧面有额外空间的原因,但是会有所帮助。
答案 0 :(得分:1)
你关闭了。请尝试以下方法......
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QVBoxLayout
from PyQt5.QtGui import QPixmap
from PyQt5.QtCore import Qt
import os
class App(QWidget):
def __init__(self):
super().__init__()
self.title = 'Document Analysis'
self.left = 30
self.top = 30
self.width = 640
self.height = 480
self.imagenumber=0
self.initUI()
def keyPressEvent(self, event):
key=event.key()
if key==Qt.Key_Right:
self.imagenumber=self.imagenumber+1
self.showimage(self.imagenumber)
# self.show()
else:
super(self).keyPressEvent(event)
def initUI(self):
layout = QVBoxLayout()
self.setLayout(layout)
self.label = QLabel(self)
layout.addWidget(self.label)
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
self.showimage(0)
self.show()
def showimage(self,imagenumber):
# label = QLabel(self)
directory = "C:\\Desktop\\Pictures"
imagelist = os.listdir(directory)
pixmap = QPixmap(directory + '\\' + imagelist[imagenumber])
# label.setPixmap(pixmap)
self.label.setPixmap(pixmap)
self.resize(pixmap.width() + 500, pixmap.height())
# self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())
主要是,你需要一个持久的标签。您也只需要调用一次show()。