如何在目标c中创建自定义异常？ [英] How to create custom exception in objective c?

问题描述

我想在目标c中实现这样的目标。

I am trying to achieve something like this in objective c.

@try{
//some code that will raise exception
}
@catch(CustomException e){//How to create this
//catching mechanism
}
@catch(NSException e){
//Generic catch
}

我需要创建CustomException类并使用它。你能帮我创建一下这个CustomException并指导我如何使用它。

I need to create CustomException class and use it. Could you please help me in creating this CustomException and guide me in how to use this.

提前致谢。

推荐答案

在最简单的情况下，我可以使用...声明一个类

In the simplest case, I can declare a class using...

@interface CustomException : NSException
@end
@implementation CustomException
@end

...代码与您发布的内容非常相似：

...and the code is very much like what you posted:

   @try{
        @throw [[CustomException alloc] initWithName:@"Custom" reason:@"Testing" userInfo:nil];
    }
    @catch(CustomException *ce){
        NSLog(@"Caught custom exception");
    }
    @catch(NSException *e){
        NSLog(@"Caught generic exception");
    }

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