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iOS 輸入時鍵盤處理問題

keyboard nan eal otto dto rdf rec userinfo mit

最正規的辦法,用通知

step 1:
在進入視圖的時候添加監視:(viewDidLoad什麽的)

    //監聽鍵盤的通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification 
object:nil];


step 2:
在鍵盤動作的時候移動視圖:

- (void)keyboardWillShow:(NSNotification *)notification {
    
    /*
     Reduce the size of the text view so that it‘s not obscured by the keyboard.
     Animate the resize so that it‘s in sync with the appearance of the keyboard.
     */
    NSDictionary *userInfo = [notification userInfo];
    
    
// Get the origin of the keyboard when it‘s displayed. NSValue* aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]; // Get the top of the keyboard as the y coordinate of its origin in self‘s view‘s coordinate system. The bottom of the text view‘s frame should align with the top of the keyboard‘s final position.
CGRect keyboardRect = [aValue CGRectValue]; keyboardRect = [self.view convertRect:keyboardRect fromView:nil]; CGFloat keyboardTop = keyboardRect.origin.y; CGRect newTextViewFrame = self.view.bounds; newTextViewFrame.size.height = keyboardTop - self.view.bounds.origin.y; // Get the duration of the animation. NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]; NSTimeInterval animationDuration; [animationDurationValue getValue:&animationDuration]; // Animate the resize of the text view‘s frame in sync with the keyboard‘s appearance. [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:animationDuration]; self.reportTableView.frame = newTextViewFrame; [UIView commitAnimations]; } - (void)keyboardWillHide:(NSNotification *)notification { NSDictionary* userInfo = [notification userInfo]; /* Restore the size of the text view (fill self‘s view). Animate the resize so that it‘s in sync with the disappearance of the keyboard. */ NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]; NSTimeInterval animationDuration; [animationDurationValue getValue:&animationDuration]; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:animationDuration]; self.reportTableView.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width,[UIScreen mainScreen].bounds.size.height - 55 - 64); [UIView commitAnimations]; }



step 3:
在退出視圖的時候註銷通知
viewDidUnload:

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

step 4:
dealloc:

-(void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self name:nil object:nil];
}


這些代碼是摘自apple sample code KeyboardAccessory.

細節自己修改下就好了,比如那個reportTableView、CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width,[UIScreen mainScreen].bounds.size.height - 55 - 64)

iOS 輸入時鍵盤處理問題