Question

在iOS Objective-C应用程序中，我试图在键盘顶部找到一个栏。我希望键盘通过位于此栏中的UITextView“激活”。但是我无法显示该栏。

我的理解：

- (void)viewDidLoad
{
    myUIView=[[UIView alloc]initWithFrame:xxx]; // 1. Create an UIView that will serve as inputAccessoryView
    myTextView=[[UITextView alloc]init]; // 2. Create a UItextView 
    [myUIView addSubview:myTextView]; // 3. Add it to the UIView 
    [myTextfield setInputAccessoryView:myUIView]; // 4. Set the UIview as being the inputAccessoryView of the textView
    // [self.view addSubview:myUIView]; // If I do this, the view is displayed but the app crashes when tapping in the textField
}

然而，视图没有显示，textView也没有显示我试图将textView作为主控制器视图的子视图，当textview显示时，myUIView不会

我在这种方法中做错了什么？

Answer 1

您没有正确使用InputAccessoryView。您要将UITextView添加到InputAccessoryView作为子视图，其中UITextView应添加到view（如UIViewController的视图中实例）

您需要像InputAccessoryView一样将UITextView分配给InputAccessoryView，就是这样，当键盘显示时，您的- (void)viewDidLoad { [super viewDidLoad]; UITextView *textView = [UITextView new]; textView.frame = CGRectMake(100, 100, 100, 40); textView.backgroundColor = [UIColor redColor]; UIView *accessoryView = [UIView new]; accessoryView.frame = CGRectMake(0, 0, CGRectGetWidth(self.view.frame), 44); accessoryView.backgroundColor = [UIColor greenColor]; textView.inputAccessoryView = accessoryView; [self.view addSubview:textView]; }视图将位于键盘区域上方。

请查看下面的示例，了解如何在代码中添加它：

override func viewDidLoad() {
    super.viewDidLoad()

    let textView = UITextView()
    textView.frame = CGRect(x: 100, y: 100, width: 100, height: 40)
    textView.backgroundColor = .red

    let accessoryView = UIView()
    accessoryView.frame = CGRect(x: 0, y: 0, width: view.frame.size.width, height: 44)
    accessoryView.backgroundColor = .green

    textView.inputAccessoryView = accessoryView

    view.addSubview(textField)
}

或Swift版

 public class Book
    {
        [Key]
        public int BookId { get; set; }
        public string Name { get; set; }
        public string AuthorName { get; set; }
        public int YearOfPublishing { get; set; }
        public LibraryType Type { get; set; }

        public ICollection<BookPublicHouse> PublicHouses { get; set; }

        public Book()
        {
            PublicHouses = new Collection<BookPublicHouse>();
        }

    }

public class PublicHouse
    {
        [Key]
        public int PublicHouseId { get; set; }

        public string PublicHouseName { get; set; }

        public string Country { get; set; }

        public ICollection<BookPublicHouse> Books { get; set; }

        public PublicHouse()
        {
            Books = new Collection<BookPublicHouse>();
        }
    }

public class BookPublicHouse
    {
        public Book Book { get; set; }
        public int BookId { get; set; }

        public PublicHouse PublicHouse { get; set; }
        public int PublicHouseId { get; set; }
    }

以下是具有绿色背景的输入附件视图的快照

Answer 2

提供的不同解决方案有效，但要求我的textView位于inputAccessoryView之外。

我的解决方案基于page的可用工作，完全符合我的期望。

简而言之，它的作用是覆盖inputAccessoryView函数，以提供动态构建的UIView，其中包含textView。

试图了解inputAccessoryView方法

2 个答案: