iOS监听键盘事件

最新推荐文章于 2021-06-01 10:55:44 发布

weixin_30819163

最新推荐文章于 2021-06-01 10:55:44 发布

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原文链接：http://www.cnblogs.com/songxing10000/p/4944031.html

本文详细介绍了如何在iOS应用中实现键盘弹出时的视图布局调整，包括获取键盘高度、设置动画平移底部工具栏以保持用户体验的一致性。

#pragma mark - view life cycle
- (void)viewDidLoad {
    [super viewDidLoad];
    
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}#pragma mark - 通知
/**
 *   键盘弹出
 */
- (void)keyboardWillShow:(NSNotification *)note
{
    
    // 1.取出键盘的高度
    CGRect temp  = [note.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGFloat height = temp.size.height;
    // 2.让工具条向上平移
    // 2.1取出键盘弹出的动画时间
    NSTimeInterval timte = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    [UIView animateWithDuration:timte delay:0 options:7 << 16 animations:^{
        self.bottomBar.transform = CGAffineTransformMakeTranslation(0, -height);
    } completion:nil];
    
}
/**
 *  键盘隐藏
 */
- (void)keyboardWillHide:(NSNotification *)note
{
    // 2.1取出键盘弹出的动画时间
    NSTimeInterval timte = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    
    // 清空transform
    [UIView animateWithDuration:timte delay:0 options:7 << 16 animations:^{
        
        self.bottomBar.transform = CGAffineTransformIdentity;
    } completion:nil];
    
}