ios - 使用 DAKeyboardControl 更改 uikeyboard 上方 uitextview 的动态高度

Question

在我的项目中，我正在使用这个项目:

DAKeyboardControl : https://github.com/danielamitay/DAKeyboardControl

附加 UIToolbar用UITextView在键盘上方并在使用平移手势关闭键盘时移动它，现在我不明白如何更改 UITextView 的高度和 UIToolbar当我编辑文本时，添加 UITextView我使用与 DAKeyboardControl 相同的代码示例，我更改 UITextField与 UITextView .

现在如何动态更改 TextView 高度？

Answer 1

将此代码放入 viewDidLoad:

self.toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0.0f,
                                                                     self.view.bounds.size.height-40,
                                                                     self.view.bounds.size.width,
                                                                     40.0f)];
    self.toolBar.barStyle = UIBarStyleBlack;

    self.toolBar.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth;
    [self.view addSubview:self.toolBar];

    self.textView = [[UITextView alloc] initWithFrame:CGRectMake(10.0f,6.0f,self.toolBar.bounds.size.width - 20.0f - 68.0f,30.0f)];
    self.textView.clipsToBounds = YES;
    self.textView.layer.cornerRadius = 5.0f;
    self.textView.autoresizingMask = UIViewAutoresizingFlexibleWidth;

    [self.textView setKeyboardAppearance:UIKeyboardAppearanceAlert];
    [self.textView setFont:[UIFont tv_LektonRegular:16]];
    [self.textView setDelegate:self];

    [self.toolBar addSubview:self.textView];

    UIButton *sendButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    sendButton.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin;
    [sendButton setTitle:NSLocalizedString(@"Send", @"") forState:UIControlStateNormal];
    [sendButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [sendButton.titleLabel setFont:[UIFont tv_LektonRegular:18]];
    [sendButton addTarget:self action:@selector(sendComment:) forControlEvents:UIControlEventTouchUpInside];

    sendButton.frame = CGRectMake(self.toolBar.bounds.size.width - 68.0f,
                                  6.0f,
                                  58.0f,
                                  29.0f);
    [self.toolBar addSubview:sendButton];

    self.view.keyboardTriggerOffset = self.toolBar.bounds.size.height;

    __weak CommentActivityViewController* weakSelf = self;

    [self.view addKeyboardPanningWithActionHandler:^(CGRect keyboardFrameInView) {

        CGRect toolBarFrame = weakSelf.toolBar.frame;
        toolBarFrame.origin.y = keyboardFrameInView.origin.y - toolBarFrame.size.height;
        weakSelf.toolBar.frame = toolBarFrame;
    }];

然后:

- (void)textViewDidChange:(UITextView *)textView
{
    [self _updateInputViewFrameWithKeyboardFrame];
}

- (void)_updateInputViewFrameWithKeyboardFrame
{
    // Calculate the height the input view ideally
    // has based on its textview's content
    UITextView *textView = self.textView;

    CGFloat newInputViewHeight;
    if ([NSURLSession class])
    {
        newInputViewHeight = textViewHeight(textView);
    } else {
        newInputViewHeight = self.textView.contentSize.height;
    }

    //10 is the border of the uitoolbar top and bottom
    newInputViewHeight += 10;
    newInputViewHeight = ceilf(newInputViewHeight);
    //newInputViewHeight = MIN(maxInputViewHeight, newInputViewHeight);

    // If the new input view height equals the current,
    // nothing has to be changed
    if (self.textView.bounds.size.height == newInputViewHeight) {
        return;
    }
    // If the new input view height is bigger than the view available, do nothing
    if ((self.view.bounds.size.height - self.view.keyboardFrameInView.size.height < newInputViewHeight)) {
        return;
    }

    CGRect inputViewFrame = self.textView.frame;
    inputViewFrame.size.height = newInputViewHeight;
    self.textView.frame = inputViewFrame;

    CGRect toolBarFrame = self.toolBar.frame;
    toolBarFrame.size.height = newInputViewHeight +10;
    toolBarFrame.origin.y = self.view.keyboardFrameInView.origin.y - toolBarFrame.size.height;
    self.toolBar.frame = toolBarFrame;

    self.view.keyboardTriggerOffset = self.toolBar.bounds.size.height;
}

static inline CGFloat textViewHeight(UITextView *textView) {
    NSTextContainer *textContainer = textView.textContainer;
    CGRect textRect =
    [textView.layoutManager usedRectForTextContainer:textContainer];

    CGFloat textViewHeight = textRect.size.height +
    textView.textContainerInset.top + textView.textContainerInset.bottom;

    return textViewHeight;
}

此代码适用于 iOS 7 及更早版本...