// 截取( )中的字符串
NSRangestartRange = [self.userCopyNamerangeOfString:@"("];
NSRangeendRange = [self.userCopyNamerangeOfString:@")"];
NSRangerange =NSMakeRange(startRange.location+ startRange.length, endRange.location- startRange.location- startRange.length);
NSString*result = [self.userCopyNamesubstringWithRange:range];
以后慢慢增加