OC textField鍵盤彈起事件

經常用到點擊textFiled時彈起鍵盤，然后 textField工具條也要隨之上升，自己做了個簡單的例子

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1. 監聽鍵盤彈起收回事件

//監聽鍵盤彈出事件[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];//監聽鍵盤隱藏事件[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

2. 實現對應方法

獲取鍵盤的高度時一定要用* objectForKey:UIKeyboardFrameEndUserInfoKey*，切記

#pragma mark - 鍵盤即將彈出事件處理 - (void)keyboardWillShow:(NSNotification *)notification {//獲取鍵盤信息NSDictionary *keyBoardInfo = [notification userInfo];//獲取動畫時間CGFloat duration = [[keyBoardInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];//獲取鍵盤的frame信息NSValue *value = [keyBoardInfo objectForKey:UIKeyboardFrameEndUserInfoKey];CGSize keyboardSize = [value CGRectValue].size;[UIView animateWithDuration:duration animations:^{CGRect frame = _chatBar.frame;frame.origin.y = SCREENHEIGHT - keyboardSize.height - frame.size.height;_chatBar.frame = frame;} completion:nil]; }#pragma mark - 鍵盤即將隱藏事件 - (void)keyboardWillHide:(NSNotification *)notification {//獲取鍵盤信息NSDictionary *keyBoardInfo = [notification userInfo];//獲取動畫時間CGFloat duration = [[keyBoardInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];//獲取鍵盤的frame信息[UIView animateWithDuration:duration animations:^{CGRect frame = _chatBar.frame;frame.origin.y = SCREENHEIGHT - _chatBar.height;_chatBar.frame = frame;} completion:nil]; }

總結

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