String.Length

描述

获取此实例中的字符数（只读）。

返回字符串中的字符数。此数据为只读。

using UnityEngine;

public class Example : MonoBehaviour
{
    string m_MyString;
    // Use this for initialization
    void Start()
    {
        //Set the string to this message
        m_MyString = "Hi there!";
        //Output the number of characters in the string
        Debug.Log("Length : " + m_MyString.Length);
    }
}

在下一个示例中，您可以输入密码，并使用 String.Length 检查密码长度是否少于 8 个字符。

//Create an Input Field ( Create>UI>Input Field) and a Text GameObject (Create>UI>Text).
//Attach this script to a GameObject
//Click on the GameObject and attach each of the Sliders and Texts to the fields in the Inspector.

using UnityEngine;
using UnityEngine.UI;

public class Example : MonoBehaviour
{
    string m_MyString;

    public InputField m_MyInputField;
    public Button m_MyButton;

    void Start()
    {
        //Call SubmitPasswordButton function when the user clicks the Button
        m_MyButton.onClick.AddListener(SubmitPasswordButton);
    }

    void Update()
    {
        //Set the string to be that of the InputField
        m_MyString = m_MyInputField.text;
    }

    //Check the length of the string and output a message to the console window
    void SubmitPasswordButton()
    {
        //Check if length of the string is less than 8
        if (m_MyString.Length < 8)
        {
            Debug.Log("Password not long enough!");
        }
        //Check if the length of the string is more than or equal to 8
        if (m_MyString.Length >= 8)
        {
            Debug.Log("Password Accepted!");
        }
    }
}