iOS 輸入時鍵盤處理問題
阿新 • • 發佈:2017-11-02
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:UIKeyboardWillHideNotificationobject: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