Question

我有一个简单的UIViewController，其中包含一些对象：UITextView和UIToolBar，它作为InputAccessoryView添加到UTextView中。当调用viewDidLayoutSubviews时，我设置了一个通知观察器，当键盘出现时调用函数“keyboardDidShow”，这样我就可以调整UITextView的大小，使其不在键盘后面。当调用textViewShouldBeginEditing时，我将InputAccessoryView添加到UITextView。但是当我去解除视图时，会抛出一个未知错误。此外，一旦我单击UIToolBar中充当InputAccessoryView的UITextField，我就不能再返回编辑UITextView了。我的代码如下：

- (void)viewDidLayoutSubviews {
    if (!resized) {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
        [poemView becomeFirstResponder];
    }
}

- (void)keyboardDidShow:(NSNotification *)note {
    if (!resized) {
        NSDictionary *keyboardInfo = [note userInfo];
        NSValue *keyboardFrameSize = [keyboardInfo valueForKey:UIKeyboardFrameBeginUserInfoKey];
        CGRect keyboardFrameBeginRect = [keyboardFrameSize CGRectValue];
        toolBar.frame = CGRectMake(0, 0, toolBar.frame.size.width, toolBar.frame.size.height);

        [txtView setFrame:CGRectMake(txtView.frame.origin.x, txtView.frame.origin.y, txtView.frame.size.width, txtView.frame.size.height - (keyboardFrameBeginRect.size.height))];
        [txtView setContentSize:CGSizeMake(txtView.frame.size.width, txtView.frame.size.height - keyboardFrameBeginRect.size.height)];
        [[NSNotificationCenter defaultCenter] removeObserver:self];

        resized = YES;
    }
}

- (IBAction)dismissView:(id)sender {
    vewTxt = nil;

    [txtView setInputAccessoryView:nil];
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (BOOL)textViewShouldBeginEditing:(UITextView *)textView {
    if (![txtView inputAccessoryView]) {
        [txtView setInputAccessoryView:[self createInputAccessoryView]];
    }

    return YES;
}

- (UIToolbar *)createInputAccessoryView {
    UIToolbar *acc = [[UIToolbar alloc] init];
    [acc setBackgroundColor:[UIColor redColor]];
    [acc setTintColor:[UIColor redColor]];
    [acc sizeToFit];
    [acc setFrame:CGRectMake(0,txtView.frame.size.height - 44, txtView.frame.size.width, 44)];

    vewTxt = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, vewTxt.frame.size.width - 25, 25)];
    [vewTxt setText:@"Etc...."];
    [vewTxt setDelegate:self];
    [vewTxt setFont:[UIFont italicSystemFontOfSize:14]];
    [vewTxt setTextColor:[UIColor grayColor]];
    [vewTxt setBorderStyle:UITextBorderStyleRoundedRect];

    UIBarButtonItem *titleItem = [[UIBarButtonItem alloc] initWithCustomView:titleTxt];
        NSArray *items = [NSArray arrayWithObjects:titleItem, nil];
    [acc setItems:items animated:YES];

    return acc;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField {
    if ([[textField text] isEqualToString:@"Etc...."]) {
        [textField setTextColor:[UIColor blackColor]];
        [textField setText:@""];
        [textField setFont:[UIFont systemFontOfSize:14]];
    }
}

Answer 1

创建键盘附件视图时是否正在创建文本视图？我不确定两个文本视图的目的不明确是明智的。

我确信这是一种疏忽。您的文本视图应该已经存在。为什么要一次又一次地创建vewTxt？您可以设置框架，但您当然不应该创建新框架。

UITextField InputAccessoryView崩溃应用程序

1 个答案: