배열(Array)

배열(Array)

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {

    @autoreleasepool {

        //배열 생성

        NSArray *array1 = [[NSArray alloc] initWithObjects:@"A",@"B",@"C", nil];

        NSArray *array2 = @[@"1", @"2", @3];

        

        NSLog(@"\narray1 : %@", array1);

        NSLog(@"\narray2 : %@", array2);

        

        //배열 요소 접근

        NSLog(@"\n2nd item : %@", [array1 objectAtIndex:1]);

        NSLog(@"\n1st item : %@", array1[0]);

        

        //for문에서의 배열 접근

        for(int i=0; i<[array1 count]; i++)

            NSLog(@"\nfor test index:%d, value:%@", i, array1[i]);

        

        for(id element in array2)

            NSLog(@"\nfor test2 value %@", element);

    }

    return 0;

}

==> 결과 : 

2019-02-15 11:35:47.514751+0900 Study[1536:287880] 

array1 : (

    A,

    B,

    C

)

2019-02-15 11:35:47.514977+0900 Study[1536:287880] 

array2 : (

    1,

    2,

    3

)

2019-02-15 11:35:47.515016+0900 Study[1536:287880] 

2nd item : B

2019-02-15 11:35:47.515049+0900 Study[1536:287880] 

1st item : A

2019-02-15 11:35:47.515064+0900 Study[1536:287880] 

for test index:0, value:A

2019-02-15 11:35:47.515078+0900 Study[1536:287880] 

for test index:1, value:B

2019-02-15 11:35:47.515092+0900 Study[1536:287880] 

for test index:2, value:C

2019-02-15 11:35:47.515117+0900 Study[1536:287880] 

for test2 value 1

2019-02-15 11:35:47.515132+0900 Study[1536:287880] 

for test2 value 2

2019-02-15 11:35:47.515190+0900 Study[1536:287880] 

for test2 value 3

Program ended with exit code: 0