鍵盤彈出和消失View的上下移動效果

#pragma mark 設置textView並在設置view隨鍵盤的移動而移動

-(void)setTextView

{

    [self.myTextView.layer setCornerRadius:5.0];

    //監聽鍵盤彈出

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

    //監聽鍵盤消失

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

    UIToolbar * topView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 45)];

    [topView setBarStyle:UIBarStyleBlackTranslucent];

    //定義兩個flexibleSpace的button，放在toolBar上，這樣完成按鈕就會在最右邊

    UIBarButtonItem * button1 =[[UIBarButtonItem  alloc]initWithBarButtonSystemItem:                                        UIBarButtonSystemItemFlexibleSpace target:self action:nil];

    

    UIBarButtonItem * button2 = [[UIBarButtonItem  alloc]initWithBarButtonSystemItem:                                        UIBarButtonSystemItemFlexibleSpace target:self action:nil];

    //定義完成按鈕

    UIBarButtonItem * doneButton = [[UIBarButtonItem alloc]initWithTitle:@"完成" style:UIBarButtonItemStyleDone  target:self action:@selector(resignKeyboard)];

    //在toolBar上加上這些按鈕

    NSArray * buttonsArray = [NSArray arrayWithObjects:button1,button2,doneButton,nil];

    [topView setItems:buttonsArray];

    [self.myTextView setInputAccessoryView:topView];

}

#pragma mark 隱藏鍵盤

-(void)resignKeyboard

{   //取消鍵盤爲第一相應者

    [self.myTextView resignFirstResponder];

}

#pragma mark 鍵盤彈出View向上移動

-(void)keyboardDidShow:(NSNotification *)notification

{

    

    NSDictionary *userInfo = [notification userInfo];

    NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];

    CGRect keyboardRect = [aValue CGRectValue];

    int height = keyboardRect.size.height; //獲取鍵盤高度

    

    CGContextRef context = UIGraphicsGetCurrentContext();

    //開始播放動畫

    [UIView beginAnimations:nil context:context];

    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

    [UIView setAnimationDuration:0.3];

    [self.myView setFrame:CGRectMake(0,-height, 320, 480)];

    

    [UIView commitAnimations];

    

}

#pragma mark 鍵盤消失View向下移動

-(void)keyboardDidHidden:(NSNotification *)notification

{

    

    CGContextRef context = UIGraphicsGetCurrentContext();

    //開始播放動畫

    [UIView beginAnimations:nil context:context];

    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

    [UIView setAnimationDuration:0.3];

    [self.myView setFrame:CGRectMake(0,0, 320, 480)];

    

    [UIView commitAnimations];

    

    

}