02-QWidget-大小位置.py

import sys

from PyQt5.Qt import *

app = QApplication(sys.argv)

window = QWidget()
# window.resize(500, 500)
window.setFixedSize(500, 500)  # 固定尺寸
window.move(200, 200)

label = QLabel(window)
label.setText("ABC")
label.move(100, 100)
label.setStyleSheet("background-color: cyan;")


def change_cao():
    new_content = label.text() + "ABC"
    label.setText(new_content)
    # label.resize(label.width() + 100, label.height())  # 必须增大label的大小才能使更长的文本显示出来
    label.adjustSize()  # 根据内容自适应大小


btn = QPushButton(window)
btn.setText("增加内容")
btn.move(100, 300)
btn.clicked.connect(change_cao)

# window.setGeometry(0, 0, 150, 150)  # 设置用户区域到屏幕左上角距离、尺寸

window.show()
# window.setGeometry(0, 0, 150, 150)

print(window.x())
print(window.width())
print(window.geometry())

sys.exit(app.exec_())