删除@“"从NSString或将NSString类型转换为变量名 [英] Remove @"" from NSString or typecast NSString into variable name

问题描述

我从文件中读取了NSString，然后我想将其定义为UIColor，以便快速更改颜色.

I read a NSString from file and then I want to #define this as a UIColor so I can quickly change color's.

我希望这样工作:

#define GRAY [UIColor darkGrayColor]

然后从文件中读取字符串:@"GRAY"并将其放入名为kColor的NSString变量中

Then read from file the string : @"GRAY" and put it in a NSString variable called kColor

然后将其粘贴到backgroundcolor属性中，如下所示:

And then paste this onto a backgroundcolor property like so:

myController.view.backgroundColor = kColor;

现在这意味着我得到了:

now this means I get :

myController.view.backgroundColor = @"GRAY";

我需要:

myController.view.backgroundColor = GRAY;

，以使#define起作用.那么，如何从字符串中删除@"或将字符串类型转换为变量名呢?我不拘泥于#define，因此，如果还有其他方法可以使它起作用，那么我会持开放态度.

for the #define to work. So how do i remove @"" from the string or typecast the string into a variable name? I'm not stuck on #define so if there is another way to get this to work, I'm open to that.

非常感谢您的帮助.

推荐答案

您可以将颜色加载到NSDictionary中.

You could load the colors into a NSDictionary.

// Put this in some global scope
NSDictionary *colors = [NSDictionary dictionaryWithObjectsAndKeys: 
    [UIColor darkGrayColor], @"GRAY", nil];

// using the dictionary
myController.view.backgroundColor = [colors objectForKey:kColor];

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