Question

我已注册键盘显示和隐藏的通知。

文本视图在未单击时可滚动...即，当它不在可编辑模式时。当用户点击..我更新它的框架出来..然后它不滚动..结束编辑后..我再次改变其位置回滚动..

这是我的代码

- (void)keyboardWillHide:(NSNotification *)n
{
    NSDictionary* userInfo = [n userInfo];

    // get the size of the keyboard
    CGSize keyboardSize = [[userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;


    // resize the scrollview
    CGRect viewFrame = self.NoteTextView.frame;
    // I'm also subtracting a constant kTabBarHeight because my UIScrollView was offset by the UITabBar so really only the portion of the keyboard that is leftover pass the UITabBar is obscuring my UIScrollView.
    viewFrame.origin.y += (keyboardSize.height * 0.36);

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    // The kKeyboardAnimationDuration I am using is 0.3
    [UIView setAnimationDuration:0.1];

    [UIView commitAnimations];

    [self.NoteTextView setContentSize:CGSizeMake(310,580)];
    [self.NoteTextView setScrollEnabled:YES];

    keyboardIsShown = NO;
}

- (void)keyboardWillShow:(NSNotification *)n
{
    // This is an ivar I'm using to ensure that we do not do the frame size adjustment on the UIScrollView if the keyboard is already shown.  This can happen if the user, after fixing editing a UITextField, scrolls the resized UIScrollView to another UITextField and attempts to edit the next UITextField.  If we were to resize the UIScrollView again, it would be disastrous.  NOTE: The keyboard notification will fire even when the keyboard is already shown.
    if (keyboardIsShown) {
        return;
    }

    NSDictionary* userInfo = [n userInfo];

    // get the size of the keyboard
    CGSize keyboardSize = [[userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;


    // resize the noteView
    CGRect viewFrame = self.NoteTextView.frame;
    // I'm also subtracting a constant kTabBarHeight because my UIScrollView was offset by the UITabBar so really only the portion of the keyboard that is leftover pass the UITabBar is obscuring my UIScrollView.
    viewFrame.origin.y -= (keyboardSize.height * 0.36);

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    // The kKeyboardAnimationDuration I am using is 0.3
    [UIView setAnimationDuration:0.3];
    [self.NoteTextView setFrame:viewFrame];
    [UIView commitAnimations];


    [self.NoteTextView setContentSize:CGSizeMake(310, 580)];
    [self.NoteTextView setScrollEnabled:YES];
    keyboardIsShown = YES;
}

我甚至启用了滚动功能，并在方法中更改了内容大小。

UITextView在更新其帧后不滚动

0 个答案: