更換NSData的特定NSStrting格式

Question

我接收包含六值的NSData的通過的NSData轉換成的NSString如在下面提供

<aaaaaaa aaaaaab> 

我剛收到此，現在我需要在以下格式

呈現上述字符串

AA:AA:AA:AA AA:AA:AA:AB 

請幫助我如何能得到上面的格式，請幫忙

Answer 1

您可以嘗試：

str = @"<aaaaaaa aaaaaab>"; 
str = [str stringByReplacingOccurrencesOfString:@"<" withString:@""]; //Remove < 
str = [str stringByReplacingOccurrencesOfString:@" " withString:@""]; //Remove space 
str = [str stringByReplacingOccurrencesOfString:@">" withString:@""]; //Remove > 
NSMutableString *mStr = [[NSMutableString alloc] initWithString:str]; 

for (int i=2; i< [mStr length]; i+=3) { 
    [mStr insertString:@":" atIndex:i]; 
} 
for (int i=11; i< [mStr length]; i+=12) { 
    [mStr insertString:@" " atIndex:i]; 
} 

這將刪除空格，<和>。然後添加：和空格。

Answer 2

str = [str stringByReplacingOccurrencesOfString:@":" 
            withString:@""]; 

str = [str lowercaseString];