我的应用的用户报告了随机崩溃。我已经整合了CrashAnalytics,它提供了以下详细信息:
__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20.
指示的行号为154,即:
self.notesView.content.frame = CGRect(x: self.notesView.content.frame.origin.x, y: self.notesView.content.frame.origin.y, width: self.notesView.content.frame.size.width, height: self.notesView.content.frame.size.height - keyboardFrame.size.height).
以下是我写的代码,包括这一行:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
label_title.addObserver(self, forKeyPath: "contentSize", options: .new, context: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardShown), name:NSNotification.Name.UIKeyboardWillShow, object: nil);
NotificationCenter.default.addObserver(self, selector: #selector(keyboardHide), name:NSNotification.Name.UIKeyboardWillHide, object: nil);
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
label_title.removeObserver(self, forKeyPath: "contentSize")
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func keyboardShown(notification: NSNotification) {
let info = notification.userInfo!
let keyboardFrame: CGRect = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
self.notesView.content.frame = CGRect(x: self.notesView.content.frame.origin.x, y: self.notesView.content.frame.origin.y, width: self.notesView.content.frame.size.width, height: self.notesView.content.frame.size.height - keyboardFrame.size.height)
}
首先,这是随机的,我从来没有得到它。其次,我无法找到确切的原因。这是因为通知观察者还是因为notesView(不是零) 根据建议here,我应该删除deinit中的键盘通知观察者吗? 如果有人以前经历过这个,请指导我。