How to set value for object in objective c

Question

I am new to ios programming,i created a class books which takes some values dynamically,so i am trying to set value for some params in book object,i am getting exception.

code:

Book
{
@property (strong,nonatomic)  NSString *bookId;
@property (strong,nonatomic)  NSString *bookStatus;
@property (strong,nonatomic)  NSString *bookName;
 }
Book * book =[Book alloc]init];
[book setValue:@"textbook" forKey:@"bookName"]; //not working
book.bookStatus=@"textbook"  //not working
[book setbookStatus:@"textbook"];  //not working
}

I am getting exception [_NSCFDictionary setbookStatus] unrecognized selector

Is this your actual code? How is you Book class defined? What is the @interface code? The exception shows that you tried to call setBookStatus on an instance of NSDictionary. You can just say book.bookName=@"textbook"; — Paulw11, Apr 16 '16 at 6:36
i wrote code in shorter format for understanding,i tried but still getting exception @PKT — skyshine, Apr 16 '16 at 6:39

Lion · Accepted Answer · 2016-04-16 07:53:15Z

Simply you can use,

self.bookName = @"yourBookName";
self.bookStatus = @"bookStatus";

You can use self to call current class object likw this in java.

If you want to access it from another class then import Book to that class and make instance of it and by that instance you can call it,s property like,

Book *myBook = [[Book alloc]init];
NSString *str = myBook.bookName;

hope this will help ;)

score -1 · Answer 2

Create the properties in the .h(Book.h) class to make properties as public. Then you can directly access the properties by dot(.)

Book *book = [[Book alloc] init];
book.bookId = @“1234”
book.bookName = @“name”

번호	제목	글쓴이	날짜	조회 수
55	아이폰 세로모드 Portrait vs 가로 모드 Landscape xcode objective c	admin	2019-05-02	10410
54	Objective-C NSString 관련 메소드 다루기	admin	2019-06-06	10385
53	Java 쓰다가 Objective-C 문자열 다루기	admin	2019-05-16	10311
52	iOS objective c. Button. Label image color setting	admin	2019-06-10	10246
51	ios – NSDictionary 모든 키 명령	admin	2019-06-03	10216
50	KeychainItemWrapper.h KeychainItemWrapper.m 다운로드 키체인 소스코드	admin	2019-06-14	10142
49	Xcode objective c 변수 선언 전달	admin	2019-06-15	10136
48	iOS Objective-C로 하는 비동기 처리	admin	2019-05-03	10090
47	Apple Developer Documentation	admin	2019-05-17	9956
46	카메라 & 마이크 퍼미션 요청 #12	admin	2020-01-18	9948
45	개발자를 위한 OS X(>= Catalina) 설정	admin	2020-01-18	9703
44	[Swift/ObjC] 딜레이 이후 실행하기	admin	2019-04-08	9687
43	Apple Developer Certificates, Identifiers & Profiles Identifiers > App IDs 만들기	admin	2019-04-23	8957
42	OSX Daily	admin	2018-05-29	8923
41	How do I rename an Xcode project 프로젝트 이름변경 완벽하게 하는 방법 순서	admin	2019-04-21	8838
40	변수와 상수 - 왕초보를 위한 스위프트 프로그래밍 강좌[iOS app with xcode&swift]	admin	2019-01-15	8709
39	버튼 구현 - 왕초보를 위한 스위프트 프로그래밍 강좌[iOS app with xcode&swift]	admin	2019-01-15	8669
38	if~else 왕초보 스위프트 프로그래밍 강좌 iOS app development with xcode&swift	admin	2019-01-15	8638
37	버튼 연결 - 왕초보를 위한 스위프트 프로그래밍 강좌[iOS app with xcode&swift]	admin	2019-01-15	8501
36	버전(Version)을 제대로 이해하기	admin	2019-04-08	8318
35	[iOS8] Today Extension (Widget) 개념 및 제약사항, 앱과의 데이터 공유	admin	2019-04-23	8225
34	아웃렛 & if~else 왕초보 스위프트 프로그래밍 강좌 iOS app development with xcode&swift	admin	2019-01-15	8214
33	UDID 무엇인가 계산하기	admin	2019-04-27	8173
32	iOS GCD (Grand Central Dispatch) 안드로이드 AsyncTask	admin	2019-05-02	8166
31	UUID + keychain 을 통한 기기 분별 개념	admin	2019-04-27	8162
30	아이폰 앱개발자 등록 비용지불 인증서 받기 앱 ID등록 방법 및 왜하는지 쉽게 설명	admin	2019-04-25	8152
29	How to use Key-Value Coding to set and get values in Objective-C 키값 저장 가져오기	admin	2019-05-01	8150
28	How to find your Device ID (UUID) IOS	admin	2019-04-27	8138
27	How to create a GUID/UUID using iOS	admin	2019-04-27	8121
26	초보를 위한 CocoaPods 코코아팟 사용법 Xcode와 연동	admin	2019-04-30	8113

스마트폰앱

How to set value for object in objective c 셋팅 값 저장 하기

How to set value for object in objective c

2 Answers