Question

我有一个在QDesigner中构建的UI，当我尝试连接信号和插槽时，Python会出现以下错误：

TypeError：connect（）在clicked（bool）和loadClicked（）

之间失败

如果我删除@pyqtSlot（）设计器，UI将启动，但是当我单击该按钮时，Python会出错并关闭。可能导致这个问题的原因是什么？

SSL_library_init()

我摆脱了QDesigner UI代码并试图导入UI文件。它仍然没有解决问题。修改后的代码如下。

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import pyqtSlot
import cv2
import sys

class Ui_Dialog(object):
    def setupUi(self, Dialog):
    # Other UI Setup and config attributes
    self.SelectImage.clicked.connect(self.loadClicked)

@pyqtSlot()
def loadClicked(self):
    super(self.loadImage("Wilkerson.png"))

def loadImage(self, fname):
    self.image = cv2.imread(fname)
    self.displayImage()

def displayImage(self):
    qformat=QImage.Format_Indexed8
    if len(self.image.shape) == 3:
        if (self.image.shape[2]) == 4:
            qformat = QImage.Format_RGBA8888
        else:
            qformat = QImage.Format_RGB888
    img = QImage(self.image, self.image.shape[1], self.image.shape[0], self.image.strides[0], qformat)
    img = img.rgbSwapped()
    self.importedImageFrame.setPixmap(QPixmap.fromImage(img))
    self.importedImageFrame.setAlignment(QtCore.Qt.AlignHCenter | QtCore.Qt.AlignVCenter)

我回去重新审视了一些事情并且能够解决问题。但是，现在我遇到了一个新问题，即无法使输出图像适合我为显示图像而创建的QDsigner标签。显示预转换后的图像，但不会缩放以适合标签。我的代码挂在display_image函数的第二行到最后一行......

class ezNPR(QDialog):
def __init__(self):
    super(ezNPR,self).__init__()
    loadUi('ezNPRApp.ui',self)
    self.Image=None
    # Insert Application control commands here
    self.AppStackedWidget.setCurrentIndex(0)
    self.ExitPushButton.clicked.connect(QDialog.close)
    self.ImagePushButton.clicked.connect(lambda:self.AppStackedWidget.setCurrentIndex(0))
    self.SignaturePushButton.clicked.connect(lambda:self.AppStackedWidget.setCurrentIndex(1))
    self.HelpPushButton.clicked.connect(lambda:self.AppStackedWidget.setCurrentIndex(2))
    self.SelectImage.clicked.connect(self.loadClicked)
    self.setWindowTitle("ezNPR Image and Photo Cropping Tool")

@pyqtSlot()
def loadClicked(self):
    fname, filter = QFileDialog.getOpenFileName(self, "Open File", 'C:\\', "Image Files (*.jpg,*.png,*.bmp,*.tif)")
    if fname:
        self.loadImage(fname)
    else:
        msg = QtWidgets.QMessageBox()
        msg.setText("Invalid image type selected. Please select a new image.")
        msg.setInformativeText("You must selct a BMP, JPG, PNG, or TIFF")
        msg.setWindowTitle("Error Loading Image")
        msg.setStandardButtons(msg.Ok)

def loadImage(self, fname):
    self.displayImage()
    self.image = cv2.imread(fname)

def displayImage(self):
    qformat = QImage.Format_Indexed8
    if len(self.image.shape) == 3:
        if (self.image.shape[2]) == 4:
            qformat = QImage.Format_RGBA8888
        else:
            qformat = QImage.Format_RGB888
    img = QImage(self.image, self.image.shape[1], self.image.shape[0], self.image.strides[0], qformat)
    img = img.rgbSwapped()
    self.importedImageFrame.setPixmap(QPixmap.fromImage(img))
    self.importedImageFrame.setAlignment(QtCore.Qt.AlignHCenter | QtCore.Qt.AlignVCenter)

PyQt5信号和插槽不会触发并挂起Python

0 个答案: