如何在获得焦点时禁用 UI.InputField 的 SelectAll() 文本? [英] How to disable SelectAll() text of UI.InputField when it gets focus?

问题描述

UI InputField 获得焦点时会突出显示其中的所有文本.我想将插入符号移动到文本的末尾，以便用户可以继续在其中写入文本.目前我有一个 hack 解决方案，它有效，但是当文本突出显示时仍然很短.这是我的黑客:

The UI InputField when it gets focus highlights all text inside. I would like to move the caret to the end of the text so the user can keep writing the text within. Currently I have a hack solution, which works, however there it is still a short moment when the text is highlighted. Here is my hack:

using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class TextFieldBehaviour : MonoBehaviour, ISelectHandler
{
    private InputField inputField;
    private bool isCaretPositionReset = false;

    void Start()
    {
        inputField = gameObject.GetComponent<InputField>();
    }

    public void OnSelect (BaseEventData eventData) 
    {
        isCaretPositionReset = false;
    }

    void Update()
    {
        if(inputField.isFocused == true && isCaretPositionReset == false)
        {
            inputField.caretPosition = inputField.text.Length;
            isCaretPositionReset = true;
        }
    }
}

我还查看了 输入字段的源代码.但是我无法在没有 SelectAll() 函数的情况下创建自定义的.由于 UnityEngine.UI.SetPropertyUtility 的保护级别，我收到了一堆错误.

I was also checking out the source code of InputField. But I have trouble trouble creating a custom one without the SelectAll() function. I am getting a bunch of errors due to the protection level of the UnityEngine.UI.SetPropertyUtility.

推荐答案

有一个技巧可以禁用文本突出显示的短暂时刻.我设法在没有 Update() 函数的情况下重做.

There is a trick to disable the short moment when the text is highlighted. I managed to redo this without the Update() function.

1.获取 InputField.selectionColor 的颜色.将其 alpha 设置为 0.

1.Get the Color of the InputField.selectionColor. Set its alpha to 0.

2.将 #1 中的新颜色应用到 InputField.

2.Apply the new color from #1 to the InputField.

3.等待一帧.你必须，因为 Unity caret 会等待一帧出现.

3.Wait for one frame. You must because Unity caret waits for one frame to appear.

4.更改 InputField 插入符号位置.

4.Change the InputField caret position.

5.将 InputField.selectionColor alpha 改回 1.

5.Change the InputField.selectionColor alpha back to 1.

public class TextFieldBehaviour : MonoBehaviour, ISelectHandler
{
    private InputField inputField;
    private bool isCaretPositionReset = false;

    void Start()
    {
        inputField = gameObject.GetComponent<InputField>();
    }

    public void OnSelect(BaseEventData eventData)
    {
        StartCoroutine(disableHighlight());
    }

    IEnumerator disableHighlight()
    {
        Debug.Log("Selected!");

        //Get original selection color
        Color originalTextColor = inputField.selectionColor;
        //Remove alpha
        originalTextColor.a = 0f;

        //Apply new selection color without alpha
        inputField.selectionColor = originalTextColor;

        //Wait one Frame(MUST DO THIS!)
        yield return null;

        //Change the caret pos to the end of the text
        inputField.caretPosition = inputField.text.Length;

        //Return alpha
        originalTextColor.a = 1f;

        //Apply new selection color with alpha
        inputField.selectionColor = originalTextColor;
    }
}

注意:

将插入符号移到文本末尾的最佳方法是使用 MoveTextEnd 函数代替 inputField.caretPosition.如果您的文本很长，您会注意到 inputField.caretPosition 的一个错误.

The best way to move caret to the end of the text is with the MoveTextEnd function instead of inputField.caretPosition. You will notice a bug with inputField.caretPosition if your text is long.

如果您关心这个，请将上面代码中的 inputField.caretPosition = inputField.text.Length; 替换为 inputField.MoveTextEnd(false);.

If you care about this, replace inputField.caretPosition = inputField.text.Length; with inputField.MoveTextEnd(false); in the code above.

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