什麼是iPhone的默認鍵盤動畫速率？

Question

前段時間我記得看到一些那種定義iPhone上的鍵盤的動畫速度的恆定，我不能爲我的生活記得在那裏我看到它....任何見解？

Answer 1

- (NSTimeInterval)keyboardAnimationDurationForNotification:(NSNotification*)notification 
{ 
    NSDictionary* info = [notification userInfo]; 
    NSValue* value = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey]; 
    NSTimeInterval duration = 0; 
    [value getValue:&duration]; 
    return duration; 
} 

Answer 2

UIKeyboardAnimationDurationUserInfoKey 爲包含標識以秒爲動畫的持續時間的雙一個NSValue對象的鍵。

Answer 3

由於這是第一款谷歌命中，我想指出的是硬編碼0.3將意味着你的看法將不正確時動畫國際用戶不同尺寸鍵盤之間（如日本）掉期（時該行動應該是即時的）。

始終使用通知的用戶信息字典的UIKeyboardAnimationDurationUserInfoKey值 - 它被當用戶通過鍵盤輕彈設置爲0。

Answer 4

要添加多到什麼長毛青蛙寫了一點。全面實施會是這樣的：

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


-(void)keyboardMovement:(NSNotification *)notification{ 
    if (_numericKeyboardShowing == false){ 
     [UIView animateWithDuration:[self keyboardAnimationDurationForNotification:notification] delay:0 
         options:UIViewAnimationCurveEaseInOut 
        animations:^ { 
         self.bottomContainerView.center = CGPointMake(self.bottomContainerView.center.x, (self.bottomContainerView.center.y - 218)); 
            } 
        completion:NULL]; 

    _numericKeyboardShowing = true; 
    } 
    else{ 
    [UIView animateWithDuration:[self keyboardAnimationDurationForNotification:notification] delay:0 
         options:UIViewAnimationCurveLinear 
        animations:^ { 
         self.bottomContainerView.center = CGPointMake(self.bottomContainerView.center.x, (self.bottomContainerView.center.y + 218)); 
        } 
        completion:NULL]; 

    _numericKeyboardShowing = false; 
} 

- (NSTimeInterval)keyboardAnimationDurationForNotification:(NSNotification *)notification 
{ 
    NSDictionary *info  = [notification userInfo]; 
    NSValue* value   = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey]; 
    NSTimeInterval duration = 0; 
    [value getValue:&duration]; 
    return duration; 
} 

Answer 5

UIKeyboardAnimationDurationUserInfoKey現在是一個NSNumber的對象，這使得代碼更短。

- (void)keyboardWillShowNotification:(NSNotification *)notification 
{ 
    NSDictionary *info = [notification userInfo]; 
    NSNumber *number = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey]; 
    double duration = [number doubleValue]; 
} 

Answer 6

在斯威夫特你的代碼看起來就像這樣：

let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size 

let animationDuration = ((userInfo[UIKeyboardAnimationDurationUserInfoKey]) as! NSNumber).floatValue 
let animationOptions = ((userInfo[UIKeyboardAnimationCurveUserInfoKey]) as! NSNumber).unsignedLongValue 

UIView.animateWithDuration(NSTimeInterval(animationDuration), delay: 0, 
    options: UIViewAnimationOptions(rawValue: animationOptions), 
    animations: {() -> Void in 
       self.view.frame.origin.y += keyboardSize.height 
       }, 
    completion: nil) 

Answer 7

斯威夫特4 - 爲我工作：

 if let duration = notification.userInfo?[UIKeyboardAnimationDurationUserInfoKey] as? Double { 
      UIView.animate(withDuration: duration, animations: { 
       self.view.layoutIfNeeded() 
      }) 
     } 

在調試模式下我duration是3.499999