QLabel自动换行的实现

我试的，自带就可以换行，

#! /usr/bin/python3
# coding = utf-8

import sys

from PyQt5.QtCore import QRect
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QLabel

if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = QWidget()
    w.resize(250, 150)
    w.move(300,300)

    dlgLayout = QVBoxLayout()
    dlgLayout.setContentsMargins(40, 40, 40, 40)
    btn = QLabel('测试11111\n111111111111111按钮')

    # btn.adjustSize()

    # btn.setGeometry(QRect(32, 40, 59, 27*4 )); # 四倍行距
    # btn.setWordWrap(True);
    # btn.setAlignment(Qt::AlignTop);
    dlgLayout.addWidget(btn)
    w.setLayout(dlgLayout)
    w.setWindowTitle('Hello world')
    w.show()
    sys.exit(app.exec_())

如果不可以，就参考这个试试: 

https://blog.csdn.net/wukai_std/article/details/62893829

1. 让QLabel自适应text的大小，直接用下面的代码： 
LabelName->adjustSize(); 
2. 让QLabel能够自动判断并换行显示： 
LabelName->setGeometry(QRect(328, 240, 329, 27*4)); //四倍行距 
LabelName->setWordWrap(true); 
LabelName->setAlignment(Qt::AlignTop); 
这种方法如果全是ASCII字符并超过一行，则不会换行！ 
╮(╯▽╰)╭只能自己动手了

# 下面的代码实现了聊天气泡大小自适应于内容,解决了中文与ASCII字符大小不同以及ASCII字符过长
# 不自动换行的问题
height = 0
width = 0
height = 56
checkLengthOver = 0
chineseExistFlag = 0
textSlice = sendText.split("\n")
sendTextList = list()

for s in textSlice:
    tmpText = ""
    tmpNum = 0
    tmpWidth = 0
    tmpNumList = list()
    tmpNumList.append(0)
    status = 0
    if not s:
        height += 16
    for i in s:
        if ord(i) in range(257):
            tmpWidth += 600 / 73
            tmpNum += 1
            if not status:
                status = 1
                height += 16
        else:
            tmpWidth += 600 / 44
            tmpNum += 1
            if not status:
                status = 1
                height += 16.3
            chineseExistFlag = 1

        if tmpWidth > 600 - 600 / 44:
            tmpNumList.append(tmpNum)
            checkLengthOver = 1
            tmpWidth = 0
            if chineseExistFlag:
                chineseExistFlag = 0
                height += 16.3
            else:
                height += 16

        if tmpWidth > width:
            width = tmpWidth
        if checkLengthOver == 1:
            width = 600

    for j in range(len(tmpNumList)-1):
        tmpText = tmpText + s[tmpNumList[j]:tmpNumList[j+1]] + "\n"
    tmpText = tmpText + s[tmpNumList[-1]:]
    sendTextList.append(tmpText)
sendText = "\n".join(sendTextList)
            # sendText = "
%s
"%(90, sendText)

        if width == 0:
            width = 70
        else:
            width += 80

        itemHeight = height + 100

        self.item.lbSendText.setMinimumSize(QtCore.QSize(width, height))
        self.item.lbSendText.setMaximumSize(QtCore.QSize(width, height))
        self.item.lbSendText.setWordWrap(True)
        self.item.lbSendText.setText(sendText)
        self.item.lbSendText.adjustSize()
        self.item.lbSendText.setScaledContents(True)

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代码不太全，有些参数定义没去找了，但细心推导还是能推出来的。