PyQt5最全68 Web之PyQt5调用JavaScript代码
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtWebEngineWidgets import *
import sys
import os
class WebEngineView(QWidget):
"""
PyQt5调用JavaScript代码
PyQt5和JavaScrip交互
什么叫交互
PyQt5<->JavaScript 即互相调用内部的函数
"""
def __init__(self):
super(WebEngineView, self).__init__()
self.setWindowTitle('PyQt5调用JavaScript')
self.setGeometry(5, 30, 1355, 730)
self.layout = QVBoxLayout()
self.setLayout(self.layout)
self.browser = QWebEngineView()
url = os.getcwd() + '/pyqt5calljs.html'
self.browser.load(QUrl.fromLocalFile(url))
self.layout.addWidget(self.browser)
button = QPushButton('设置全名')
button.clicked.connect(self.fullname)
self.layout.addWidget(button)
# 接受js返回值 即pyqt5calljs.html文件中的fullname函数返回值
def js_callback(self, result):
print(result)
def fullname(self):
self.value = 'hello world'
self.browser.page().runJavaScript('fullname("' + self.value + '");', self.js_callback)
if __name__ == '__main__':
app = QApplication(sys.argv)
main = WebEngineView()
print(main.__doc__)
main.show()
sys.exit(app.exec_())
对应的pyqt5calljs.html文件如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>测试页面</title>
<script>
function fullname(value){
alert("<" + value + ">")
var firstname = document.getElementById('firstname').value;
var lastname = document.getElementById('lastname').value;
var fullname = firstname + ' ' + lastname
document.getElementById('fullname').value = fullname;
document.getElementById('submit-btn').style.display = 'block';
return fullname;
}
</script>
</head>
<body>
<form>
<label>First Name:</label>
<input type="text" name="firstname" id="firstname"></input>
<br/>
<label>Last Name:</label>
<input type="text" name="lastname" id="lastname"></input>
<br/>
<label>Full Name:</label>
<input type="text" name="fullname" id="fullname"></input>
<br/>
<input style="display:none;" type="submit" id="submit-btn"/>
</form>
</body>
</html>