随笔- 103 文章- 0 评论- 5 阅读- 16万

弹出键盘怎样把tableview往上顶？不遮住输入行

弹出键盘怎样把tableview往上顶？不遮住输入行

- (void)registerForKeyboardNotifications {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil];
    NSLog(@"register");
}
- (void)keyboardWasShown:(NSNotification *)aNotification {
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
    displayTable.scrollEnabled = YES;
    displayTable.contentInset = contentInsets;
    displayTable.scrollIndicatorInsets = contentInsets;
    NSLog(@"keyboardWasShown");

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your application might not need or want this behavior.
    CGRect aRect = self.view.frame;
    aRect.size.height -= kbSize.height;
    if (!CGRectContainsPoint(aRect, activeField.superview.superview.frame.origin) ) {
        CGPoint scrollPoint = CGPointMake(0.0, activeField.superview.superview.frame.origin.y-aRect.size.height+44);
        [displayTable setContentOffset:scrollPoint animated:YES];
    }
}
- (void)keyboardWillBeHidden:(NSNotification *)aNotification {
    UIEdgeInsets contentInsets = UIEdgeInsetsZero;
    displayTable.contentInset = contentInsets;
    displayTable.scrollIndicatorInsets = contentInsets;
}

[self registerForKeyboardNotifications]

	做出来了，注册UIKeyboardDidShowNotification通知，在里面可以得到键盘的大小，算出键盘的搜索条间的矩形，加上一个背景为黑色 alpha为0.9的UIView 就行了，有搜索结果，再往上加UItableView

最正规的办法，用通知
step 1：
在进入视图的时候添加监视：（viewDidLoad什么的）
复制代码
// Observe keyboard hide and show notifications to resize the text view appropriately.
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

step 2:
在键盘动作的时候移动视图：
复制代码
- (void)keyboardWillShow:(NSNotification *)notification {

    /*
     Reduce the size of the text view so that it's not obscured by the keyboard.
     Animate the resize so that it's in sync with the appearance of the keyboard.
     */
    NSDictionary *userInfo = [notification userInfo];

    // Get the origin of the keyboard when it's displayed.
    NSValue* aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
    // Get the top of the keyboard as the y coordinate of its origin in self's view's coordinate system. The bottom of the text view's frame should align with the top of the keyboard's final position.
    CGRect keyboardRect = [aValue CGRectValue];
    keyboardRect = [self.view convertRect:keyboardRect fromView:nil];

    CGFloat keyboardTop = keyboardRect.origin.y;
    CGRect newTextViewFrame = self.view.bounds;
    newTextViewFrame.size.height = keyboardTop - self.view.bounds.origin.y;

    // Get the duration of the animation.
    NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval animationDuration;
    [animationDurationValue getValue:&animationDuration];

    // Animate the resize of the text view's frame in sync with the keyboard's appearance.
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:animationDuration];

    textView.frame = newTextViewFrame;
    [UIView commitAnimations];
}
- (void)keyboardWillHide:(NSNotification *)notification {

    NSDictionary* userInfo = [notification userInfo];

    /*
     Restore the size of the text view (fill self's view).
     Animate the resize so that it's in sync with the disappearance of the keyboard.
     */
    NSValue *animationDurationValue = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval animationDuration;
    [animationDurationValue getValue:&animationDuration];

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:animationDuration];

    textView.frame = self.view.bounds;

    [UIView commitAnimations];
}

step 3:
在退出视图的时候注销通知
viewDidUnload:
复制代码
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];

dealloc:
复制代码
[[NSNotificationCenter defaultCenter] removeObserver:self name:nil object:nil];

这些代码是摘自apple sample code KeyboardAccessory.
些许细节自己修改下就好了，比如那个textView

- (BOOL)textFieldDidBeginEditing:(UITextField *)textField
{
    UITableViewCell * cell=(UITableViewCell *)[[textField  superview] superview];
    NSIndexPath *indexPath=[curTable indexPathForCell:cell];
    if (indexPath.section==0) {

    }else {
        [UIView beginAnimations:@"ResizeForKeyBoard" context:nil];
        [UIView setAnimationDuration:0.30f];
        point = curTable.center;
        curTable.center = CGPointMake(160, 120);
        [UIView commitAnimations];
    }
    return YES;
}

- (BOOL)textFieldDidEndEditing:(UITextField *)textField
{
    UITableViewCell * cell=(UITableViewCell *)[[textField  superview] superview];
    NSIndexPath *indexPath=[curTable indexPathForCell:cell];

    if (indexPath.section==0) {

    }else {
        [UIView beginAnimations:@"ResizeForKeyBoard" context:nil];
        [UIView setAnimationDuration:0.30f];

        curTable.center = point;
        [UIView commitAnimations];
    }
    return YES;
}

-(BOOL)textFieldShouldReturn:(UITextField *)textField
{

    [textField resignFirstResponder];

    return YES;
}