iOS 輸入時鍵盤處理問題，ios輸入鍵盤處理

iOS 輸入時鍵盤處理問題，ios輸入鍵盤處理

在iOS的開發過程中，有時候需要處理鍵盤的彈出和收回。

以及鍵盤彈出收回時、view的處理

最正規的辦法，用通知

 

step 1：
在進入視圖的時候添加監視：（viewDidLoad什麼的）

 

    //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:
在鍵盤動作的時候行動裝置檢視：

 

- (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:
在退出視圖的時候登出通知
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)