我有2个HTML页面:一个询问用户有关某个主题的输入,另一个用于从与该主题相关的Twitter Streaming API中提取Twitter数据。然而,这些信息不断变化。当我手动刷新时,弹出窗口通知我我想要"确认数据重新提交"当我点击"继续"时,它会给我新的信息。我想在我的代码中自动执行此操作,并且每10秒执行一次。
我的HTML页面是与Flask一起创建的,并使用Twitter Bootstrap CSS和JS文件。我尝试使用func registerForKeyboardNotifications(){
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWasShown(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillBeHidden(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func deregisterFromKeyboardNotifications(){
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func keyboardWasShown(notification: NSNotification){
self.scrollView.isScrollEnabled = true
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardSize!.height, 0.0)
self.scrollView.contentInset = contentInsets
self.scrollView.scrollIndicatorInsets = contentInsets
var aRect : CGRect = self.view.frame
aRect.size.height -= keyboardSize!.height
if let activeField = self.activeField {
if (!aRect.contains(activeField.frame.origin)){
self.scrollView.scrollRectToVisible(activeField.frame, animated: true)
}
}
}
func keyboardWillBeHidden(notification: NSNotification){
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, -keyboardSize!.height, 0.0)
self.scrollView.contentInset = contentInsets
self.scrollView.scrollIndicatorInsets = contentInsets
self.view.endEditing(true)
self.scrollView.isScrollEnabled = false
}
func textFieldDidBeginEditing(_ textField: UITextField){
activeField = textField
}
func textFieldDidEndEditing(_ textField: UITextField){
activeField = nil
}
方式,虽然它会自动刷新页面,但它不保留在上一页提交的表单数据。
这样的事情是不可能的吗?
答案 0 :(得分:2)
我假设您有一个提交此表单的按钮。您是否考虑过订阅onClick事件?您可以创建一个回调函数,并在其中从窗口全局对象中调用location.reload();
。
答案 1 :(得分:2)
您可以使用:
location.reload();
和
setInterval();
答案 2 :(得分:2)
要设置时间间隔,您可以使用此window.setInterval(function, milliseconds)
以获取文档