当单元格包含文本字段并成为第一响应者时，标准行为是自动设置集合视图的内容偏移量，以防止隐藏文本字段。
为什么键盘出现时UICollectionView偏移量发生变化
这是自动发生的，是意料之中的行为。
当键盘出现时，我如何自定义单元格向上的动画？
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
有了这个，你可以相应地切换UICollectionView的高度
您应该实现UIScrollViewDelegate和UITextFieldDelegate并添加：
- (void)viewDidLoad
{
[self addNotificationObserver];
}
-(void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self removeObservers];
}
-(void)addNotificationObserver
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)keyboardWillShow:(NSNotification *)notification
{
CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
[UIView animateWithDuration:0.1 animations:^{
CGRect f = self.view.frame;
f.origin.y = -keyboardSize.height;
self.view.frame = f;
}];
}
-(void)keyboardWillHide:(NSNotification *)notification
{
[UIView animateWithDuration:0.1 animations:^{
CGRect f = self.view.frame;
f.origin.y = 0.0f;
self.view.frame = f;
}];
}
-(void)removeObservers
{
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"UIKeyboardWillShowNotification" object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"UIKeyboardWillHideNotification" object:nil];
}