Objective - c 데이터 길이

//  Created by chenyijun on 16/10/4.
//  Copyright (c) 2016  chenyijun. All rights reserved.
//

#import 

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSLog(@"char                            length ===== %ld
", sizeof(char));
        NSLog(@"short int                       length ===== %ld
", sizeof(short int));
        NSLog(@"unsigned short int              length ===== %ld
", sizeof(unsigned short int));
        NSLog(@"int                             length ===== %ld
", sizeof(int));
        NSLog(@"unsigned int                    length ===== %ld
", sizeof(unsigned int));
        NSLog(@"long int                        length ===== %ld
", sizeof(long int));
        NSLog(@"unsigned long int               length ===== %ld
", sizeof(unsigned long int));
        NSLog(@"long long int                   length ===== %ld
", sizeof(long long int));
        NSLog(@"unsigned long long int          length ===== %ld
", sizeof(unsigned long long int));
        NSLog(@"float                           length ===== %ld
", sizeof(float));
        NSLog(@"double                          length ===== %ld
", sizeof(double));
        NSLog(@"long double                     length ===== %ld
", sizeof(long double));
        NSLog(@"id                              length ===== %ld
", sizeof(id));
    }
    return 0;
}

실행 결과
2016-10-04 16:08:50.751 practice10_06[914:26823] char                                      length ===== 1
2016-10-04 16:08:50.752 practice10_06[914:26823] short int                               length ===== 2
2016-10-04 16:08:50.752 practice10_06[914:26823] unsigned short int              length ===== 2
2016-10-04 16:08:50.752 practice10_06[914:26823] int                                         length ===== 4
2016-10-04 16:08:50.752 practice10_06[914:26823] unsigned int                        length ===== 4
2016-10-04 16:08:50.752 practice10_06[914:26823] long int                                length ===== 8
2016-10-04 16:08:50.752 practice10_06[914:26823] unsigned long int               length ===== 8
2016-10-04 16:08:50.752 practice10_06[914:26823] long long int                        length ===== 8
2016-10-04 16:08:50.752 practice10_06[914:26823] unsigned long long int       length ===== 8
2016-10-04 16:08:50.752 practice10_06[914:26823] float                                      length ===== 4
2016-10-04 16:08:50.752 practice10_06[914:26823] double                                  length ===== 8
2016-10-04 16:08:50.753 practice10_06[914:26823] long double                         length ===== 16
2016-10-04 16:08:50.753 practice10_06[914:26823] id                                          length ===== 8