删除NSString的一部分，并将其复制到另一个NSString

Question

所以我有一个NSString，可以这样说：NSString *mainString = @"My Name is Andrew (I like computers)"; 我想从mainString中的“（”到“）”中删除所有内容。我想把“（）”之间的所有内容放入一个子字符串中。

例如：

NSString *mainString = @"My Name is Andrew (I like computers)"; 
NSString *subString; 

//The code I need help with 

mainString = @"y Name is Andrew "; 
subString = @"I like computers"; 

我希望这是有道理的。这真的会帮助我。提前致谢。我一直在玩NSRange和NSMutableStrings，但我遇到了麻烦。提前致谢。

Answer 1

这可能是一个更简单的方法：

NSString *mainString = @"My Name is Andrew (I like computers)"; 
NSString *subString; 

NSArray *array = [mainString componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"()"]]; 

mainString = [array objectAtIndex:0]; // "My Name is Andrew " 
subString = [array objectAtIndex:1]; // "I like computers" 

Answer 2

int startPosition = [mainString rangeOfString:@"("].location + 1; 
int endPosition = [mainString rangeOfString:@")"].location; 

NSRange range = NSMakeRange(startPosition, endPosition - startPosition); 

NSString *subString = [mainString substringWithRange:range]; 

和darvids0n在下面的评论提到：

mainString = [mainString substringToIndex:startPosition - 1]