unity-UIInput自定义限制输入字符

UIInput组件如下图所示

UIInput可以用于创建输入框，它自带6种限制方式，如下图所示

最后一种Alphabet Int Chinese是我自定义的，用于限制输入字母，数字，汉字，比如昵称，就可以使用这种设定

自定义限制输入需要修改UIInput的代码

首先，找到Validation这个属性

 1 public enum Validation
 2     {
 3         None,
 4         Integer,
 5         Float,
 6         Alphanumeric,
 7         Username,
 8         Name,
 9         AlphabetIntChinese,        // 自定义
10     }

在其中加入我们自定义类型的名字，我这里加的是AlphabetIntChinese
找到Validate这个函数

 1 protected char Validate (string text, int pos, char ch)
 2     {
 3         // Validation is disabled
 4         if (validation == Validation.None || !enabled) return ch;
 5
 6         if (validation == Validation.Integer)
 7         {
 8             // Integer number validation
 9             if (ch >= ‘0‘ && ch <= ‘9‘) return ch;
10             if (ch == ‘-‘ && pos == 0 && !text.Contains("-")) return ch;
11         }
12         else if (validation == Validation.Float)
13         {
14             // Floating-point number
15             if (ch >= ‘0‘ && ch <= ‘9‘) return ch;
16             if (ch == ‘-‘ && pos == 0 && !text.Contains("-")) return ch;
17             if (ch == ‘.‘ && !text.Contains(".")) return ch;
18         }
19         else if (validation == Validation.Alphanumeric)
20         {
21             // All alphanumeric characters
22             if (ch >= ‘A‘ && ch <= ‘Z‘) return ch;
23             if (ch >= ‘a‘ && ch <= ‘z‘) return ch;
24             if (ch >= ‘0‘ && ch <= ‘9‘) return ch;
25         }
26         else if (validation == Validation.Username)
27         {
28             // Lowercase and numbers
29             if (ch >= ‘A‘ && ch <= ‘Z‘) return (char)(ch - ‘A‘ + ‘a‘);
30             if (ch >= ‘a‘ && ch <= ‘z‘) return ch;
31             if (ch >= ‘0‘ && ch <= ‘9‘) return ch;
32         }
33         else if (validation == Validation.Name)
34         {
35             char lastChar = (text.Length > 0) ? text[Mathf.Clamp(pos, 0, text.Length - 1)] : ‘ ‘;
36             char nextChar = (text.Length > 0) ? text[Mathf.Clamp(pos + 1, 0, text.Length - 1)] : ‘\n‘;
37
38             if (ch >= ‘a‘ && ch <= ‘z‘)
39             {
40                 // Space followed by a letter -- make sure it‘s capitalized
41                 if (lastChar == ‘ ‘) return (char)(ch - ‘a‘ + ‘A‘);
42                 return ch;
43             }
44             else if (ch >= ‘A‘ && ch <= ‘Z‘)
45             {
46                 // Uppercase letters are only allowed after spaces (and apostrophes)
47                 if (lastChar != ‘ ‘ && lastChar != ‘\‘‘) return (char)(ch - ‘A‘ + ‘a‘);
48                 return ch;
49             }
50             else if (ch == ‘\‘‘)
51             {
52                 // Don‘t allow more than one apostrophe
53                 if (lastChar != ‘ ‘ && lastChar != ‘\‘‘ && nextChar != ‘\‘‘ && !text.Contains("‘")) return ch;
54             }
55             else if (ch == ‘ ‘)
56             {
57                 // Don‘t allow more than one space in a row
58                 if (lastChar != ‘ ‘ && lastChar != ‘\‘‘ && nextChar != ‘ ‘ && nextChar != ‘\‘‘) return ch;
59             }
60         }
61         //自定义，只允许输入字母数字汉字
62         else if (validation == Validation.AlphabetIntChinese)
63         {
64             if (ch>=0x4e00 && ch<=0x9fa5) return ch;//这个主要是汉字的范围
65             if (ch >= ‘A‘ && ch <= ‘Z‘) return ch;
66             if (ch >= ‘a‘ && ch <= ‘z‘) return ch;
67             if (ch >= ‘0‘ && ch <= ‘9‘) return ch;
68         }
69         return (char)0;
70     }

在函数最后加上我们所需的类型即可

也可以从此函数中看出，原设类型都是哪种限制

以上做好后，在UIInput组件中Validate属性选择我们自定义的属性即可