ios - typedef 行 : 上的“预期标识符”错误

Question

我有这段代码:

#import <Foundation/Foundation.h>
@class Completions;

typedef enum inputSource { KEY_TYPE = 0, WORD_SELECTION = 1, MOVEMENT = 3, BACKSPACE = 4 } InputSource;
...

出于某种原因，我在行中收到错误消息:

`typedef enum inputSource { KEY_TYPE = 0, WORD_SELECTION = 1, MOVEMENT = 3, BACKSPACE = 4 } InputSource`;

这里有什么问题？

Answer 1

使用:typedef enum { KEY_TYPE = 0, WORD_SELECTION = 1, MOVEMENT = 3, BACKSPACE = 4 } InputSource;

你不需要inputSource。

或者更好的是，使用新的 Objective-C 风格:

typedef NS_ENUM(NSInteger, InputSource) {
    KEY_TYPE = 0,
    WORD_SELECTION = 1,
    MOVEMENT = 3,
    BACKSPACE = 4
};