objective-c: how to assign string to NSMutableData?

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挽巷
挽巷 2021-01-21 19:40

I am to send data to digital meter for which I want data in NSMutableData form. I am trying to assign it data but getting errors.

NSMutableData *body = [[NSMuta         


        
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  •  误落风尘
    2021-01-21 20:06

    NSString *str = @"ABC";    
    NSMutableData* body = (NSMutableData *)[str dataUsingEncoding:NSUTF8StringEncoding];
    

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