第11月第31天 keyboardwillshow CGAffineTransformMakeTranslation

最新推荐文章于 2024-05-27 09:35:11 发布

转载最新推荐文章于 2024-05-27 09:35:11 发布 · 68 阅读

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原文链接：http://www.cnblogs.com/javastart/p/7457470.html

本文介绍了一个iOS应用中处理键盘弹出和隐藏时视图变化的方法。通过注册键盘通知并在键盘显示和隐藏时调整tableView和bottomView的位置来实现平滑过渡。文章详细展示了如何使用UIKit中的UIView动画来同步视图变化，确保用户界面的流畅体验。

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- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)registerNotification {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showKeyboard:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self  selector:@selector(hideKeyboard:) name:UIKeyboardWillHideNotification object:nil];
}

#pragma mark - keyboard
- (void)showKeyboard:(NSNotification *)noti {
    NSDictionary *info=[noti userInfo];
    
    NSTimeInterval duration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    UIViewAnimationOptions options = [info[UIKeyboardAnimationCurveUserInfoKey] unsignedIntegerValue] << 16;
    
    CGRect keyboardRect = [info[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    CGFloat keyboardHeight = MIN(CGRectGetWidth(keyboardRect), CGRectGetHeight(keyboardRect));
    
    [UIView animateWithDuration:duration delay:0 options:options animations:^{
        CGFloat compareH = self.tableView.contentSize.height -(self.view.height - 45 - 64 - keyboardHeight);
        if (compareH >  0) {
            if (compareH < keyboardHeight) {
                self.tableView.transform = CGAffineTransformMakeTranslation(0, -compareH);
            } else {
                self.tableView.transform = CGAffineTransformMakeTranslation(0, -keyboardHeight);
            }
        }
        
        self.bottomView.transform = CGAffineTransformMakeTranslation(0, -keyboardHeight);
        
    } completion:nil];
}

- (void)hideKeyboard:(NSNotification *)noti {
    
    NSDictionary *info=[noti userInfo];
    
    NSTimeInterval duration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    UIViewAnimationOptions options = [info[UIKeyboardAnimationCurveUserInfoKey] unsignedIntegerValue] << 16;
    
    [UIView animateWithDuration:duration delay:0 options:options animations:^{
        
        self.tableView.transform = CGAffineTransformIdentity;
        self.bottomView.transform = CGAffineTransformIdentity;
        
    } completion:nil];
    
}

转载于:https://www.cnblogs.com/javastart/p/7457470.html