這段代碼有什麼問題..（動畫視圖）？

Question

我不知道爲什麼會發生這種情況..

我想在用戶開始在文本字段中鍵入內容時激活我的視圖。但代碼僅適用於橫向左排列，但不正確的景觀...

這些方法被稱爲在兩個方向...

這裏是代碼..

- (void)keyboardWasShown:(NSNotification *)aNotification { 
    if (keyboardShown) 
     return; 

     NSTimeInterval animationDuration = 0.3; 
     CGRect frame = self.view.frame; 
     frame.size.width += 150; 
     [UIView beginAnimations:@"ResizeForKeyboard" context:nil]; 
     [UIView setAnimationDuration:animationDuration]; 
     self.view.frame = frame; 
     [UIView commitAnimations]; 



    keyboardShown = YES; 
} 

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

     NSTimeInterval animationDuration = 0.3; 
     CGRect frame = self.view.frame; 
     frame.size.width -= 150; 
     [UIView beginAnimations:@"ResizeForKeyboard" context:nil]; 
     [UIView setAnimationDuration:animationDuration]; 
     self.view.frame = frame; 
     [UIView commitAnimations]; 


    keyboardShown = NO; 
} 

截至目前我剛硬編碼的值..

Answer 1

OK ..想通了一些幫助......

當您設置視圖的框架及其控制器添加到窗口的根視圖控制器那麼你應該使用邊界....

因爲窗戶框架保持不變...

所以這裏是新的代碼看起來..

- (void)keyboardShown:(NSNotification *) aNotification { 
    if (keyboardShown) 
     return; 
    CGRect frame = self.view.bounds; 
    frame.origin.y += 150; 
    [UIView beginAnimations:@"ResizeForKeyboard" context:nil]; 
    [UIView setAnimationDuration:0.3]; 
    self.view.bounds = frame; 
    [UIView commitAnimations]; 
    keyboardShown = NO; 
} 

- (void)keyboardHidden:(NSNotification *) aNotification { 
    CGRect frame = self.view.bounds; 
    frame.origin.y -= 150; 
    [UIView beginAnimations:@"ResizeForKeyboard" context:nil]; 
    [UIView setAnimationDuration:0.3]; 
    self.view.bounds = frame; 
    [UIView commitAnimations]; 
    keyboardShown = NO; 
} 

Answer 2

爲什麼不動畫的視圖的起源而不是大小？

frame.origin.y -= 150; 

和

frame.origin.y = 0;