在NSString的圆括号之间提取值 [英] Extract values between parenthesis from NSString

问题描述

我有一个NSString，将像xxxx（yyyyy），其中x和y可以是任何字符。我想从括号内提取y。我设法使用NSScanner提取x，但我还没有想出正确的方法提取出y。

解决方案

只需完成：

如果您完全确定输出的格式，您可以使用数组方法：

  NSString * inputString; // this is in the formxxxx（yyyy）
 
 NSCharacterSet * delimiters = [NSCharacterSet characterSetWithCharactersInString：@（）]; 
 NSArray * splitString = [inputString componentsSeparatedByCharactersInSet：delimiters]; 
 
 NSString * xString = [splitString objectAtIndex：0]; 
 NSString * yString = [splitString objectAtIndex：1]; 
  

当然，您需要确保定界字符不存在于inputString

I have an NSString that will be something like "xxxx (yyyyy)" where x and y can be any character. I'd like to extract just the y from inside the parenthesis. I managed to extract the x using a NSScanner but I haven't figured out the proper way to extract out the y.

解决方案

Just to be complete:

If you are absolutely sure of the format of your output you can use the array methods:

NSString *inputString; // this is in the form "xxxx(yyyy)"

NSCharacterSet *delimiters = [NSCharacterSet characterSetWithCharactersInString:@"()"];
NSArray *splitString = [inputString componentsSeparatedByCharactersInSet:delimiters];

NSString *xString = [splitString objectAtIndex:0];
NSString *yString = [splitString objectAtIndex:1];

Of course, you need to be sure that the delimiting characters don’t exist in the inputString

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