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CustomKeyboard/Model/KBKey.h

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+//
+//  KBKey.h
+//  CustomKeyboard
+//
+//  简单的键位数据模型，用于描述键盘上的一个键。
+//
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+
+typedef NS_ENUM(NSInteger, KBKeyType) {
+    KBKeyTypeCharacter = 0,   // 普通字符输出
+    KBKeyTypeBackspace,       // 删除
+    KBKeyTypeShift,           // 大小写切换
+    KBKeyTypeModeChange,      // 模式切换（如 123/ABC）
+    KBKeyTypeSpace,           // 空格
+    KBKeyTypeReturn,          // 回车/发送
+    KBKeyTypeGlobe,           // 系统地球键
+    KBKeyTypeCustom           // 自定义功能占位
+};
+
+@interface KBKey : NSObject
+
+@property (nonatomic, assign) KBKeyType type;
+@property (nonatomic, copy) NSString *title;      // 显示标题
+@property (nonatomic, copy) NSString *output;     // 字符键插入的文本
+
++ (instancetype)keyWithTitle:(NSString *)title output:(NSString *)output;
++ (instancetype)keyWithTitle:(NSString *)title type:(KBKeyType)type;
+
+@end

CustomKeyboard/Model/KBKey.m

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+//
+//  KBKey.m
+//  CustomKeyboard
+//
+
+#import "KBKey.h"
+
+@implementation KBKey
+
++ (instancetype)keyWithTitle:(NSString *)title output:(NSString *)output {
+    KBKey *k = [[KBKey alloc] init];
+    k.type = KBKeyTypeCharacter;
+    k.title = title ?: @"";
+    k.output = output ?: title ?: @"";
+    return k;
+}
+
++ (instancetype)keyWithTitle:(NSString *)title type:(KBKeyType)type {
+    KBKey *k = [[KBKey alloc] init];
+    k.type = type;
+    k.title = title ?: @"";
+    k.output = @"";
+    return k;
+}
+
+@end
+