Whatsapp風格 - 鍵盤出現在工具欄下

Question

我該如何做到這一點whatsapp風格，其中點擊消息空間時，會從底部向上推鍵盤，以及向上推動工具欄。然後取消（即在後臺點擊）時，它會使用工具欄

Answer 1

這是用U IKeyboardWillShowNotification，UIKeyboardDidShowNotification，UIKeyboardWillHideNotification和UIKeyboardDidHideNotification通知做推鍵盤迴落。 然後，當你處理通知調整框架的高度：

例如：

- (void) keyboardWillShow:(NSNotification *)aNotification{ 

    NSDictionary* info = [aNotification userInfo]; 
    NSTimeInterval duration = [[info objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue]; 

    NSValue* aValue = [info objectForKey:UIKeyboardFrameBeginUserInfoKey]; 
    CGFloat keyboardHeight = [aValue CGRectValue].size.height; 

    self.keyboardVissible = YES; 

    [UIView animateWithDuration:duration animations:^{ 
     CGRect frame = self.contentView.frame; 
     frame.size.height -= keyboardHeight; 
     self.contentView.frame = frame; 
    }]; 
} 

您需要註冊接收通知，您應該只聽鍵盤通知時，視圖

- (void) viewWillAppear:(BOOL)animated { 
    [super viewWillAppear:animated]; 

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil]; 
} 

- (void) viewDidDisappear:(BOOL)animated { 
    [super viewDidDisappear:animated]; 

    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil]; 
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil]; 
}