字符串从一个字符串截取到另一个字符串

字符串从一个字符串截取到另一个字符串：

NSString *webString=@"vwtrymaindocid/sajdhjaskd/fif/asdhasdja/";

NSString *pageStart=@"fif";

NSString *pageEnd=@"$file";

int startOffset=[webString rangeOfString:pageStart].location;

int endOffset=[webString rangeOfString:pageEnd].location;

//截取substring

NSString *partialString=[webStringsubstringWithRange:NSMakeRange(startOffset, endOffset-startOffset)];

NSLog(@"\n b: %@",partialString);

输出为：/sajdhjaskd/