- (void)viewWillAppear:(BOOL)animated
{
//启用监听
[self registerForKeyboardNotifications];
}
- (void)viewWillDisappear:(BOOL)animated
{
//关闭监听
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)registerForKeyboardNotifications
{
//使用NSNotificationCenter 鍵盤出現時
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShown:)
name:UIKeyboardWillChangeFrameNotification object:nil];
//使用NSNotificationCenter 鍵盤隐藏時
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
}
- (void)keyboardWillShown:(NSNotification*)aNotification
{
NSDictionary *info = [aNotification userInfo];
CGFloat duration = [[info objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];
NSValue *value = [info objectForKey:UIKeyboardFrameEndUserInfoKey];
CGSize keyboardSize = [value CGRectValue].size;
NSLog(@"高-%f",keyboardSize.height);
NSLog(@"宽-%f",keyboardSize.width);
//输入框位置动画加载
[UIView animateWithDuration:duration animations:^{
//将输入框位置提高
_backgroundScroll.frame = DrawingAdapter(0, -keyboardSize.height, 375, 667);
}];
}
//当键盘隐藏的时候
- (void)keyboardWillBeHidden:(NSNotification*)aNotification{
//将输入框位置还原
_backgroundScroll.frame = DrawingAdapter(0, 0, 375, 667);
}
