枚举值NSString（iOS） [英] enum Values to NSString (iOS)

问题描述

枚举{value1，value2，value3} myValue;

在我应用程序的某一点上，我希望检查该枚举的哪个值现在是活动的。我正在使用NSLog，但我不清楚如何显示枚举的当前值（value1 / valu2 / valu3 / etc ...）作为NSLog的NSString。

任何人？

解决方案

这里回答：关于实现的几个建议

底线是 Objective-C 正在使用常规旧的 C 枚举

给定一个枚举像这样：

  typedef枚举{a，b，c} FirstThreeAlpha; 
  

您的方法如下所示：

   - （NSString *）convertToString：（FirstThreeAlpha）whichAlpha {
 NSString * result = nil; 
 
 switch（whichAlpha）{
 case a：
 result = @a; 
 break; 
案例b：
 result = @b; 
 break; 
 case c：
 result = @c; 
 break; 
 
默认值：
 result = @unknown; 
} 
 
返回结果; 
} 
  

I have an enum holding several values:

enum {value1, value2, value3} myValue;

In a certain point in my app, I wish to check which value of the enum is now active. I'm using NSLog but I'm not clear on how to display the current value of the enum (value1/valu2/valu3/etc...) as a NSString for the NSLog.

Anyone?

解决方案

This is answered here: a few suggestions on implementation

The bottom line is Objective-C is using a regular, old C enum, which is just a glorified set of integers.

Given an enum like this:

typedef enum { a, b, c } FirstThreeAlpha;

Your method would look like this:

- (NSString*) convertToString:(FirstThreeAlpha) whichAlpha {
    NSString *result = nil;

    switch(whichAlpha) {
        case a:
            result = @"a";
            break;
        case b:
            result = @"b";
            break;
        case c:
            result = @"c";
            break;

        default:
            result = @"unknown";
    }

    return result;
}

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