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回答:
在聊天页面的 viewDidLoad 监听键盘通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(rcInputBar_didReceiveKeyboardWillShowNotification:) name:UIKeyboardWillShowNotification object:nil]; - (void)rcInputBar_didReceiveKeyboardWillShowNotification:(NSNotification *)notification { [self.chatSessionInputBarControl.inputTextView becomeFirstResponder]; }