How can I do this:
PHP:
$arr1 = array( 'a', 1, 'b', 5, 'z' ); $arr2 = array( 'key1' => 'value1', 'key2' => 'value2' ); $arr3 = array( 'key1' => 'value1', 'value2', 'value3' ); and this:
foreach ($arr1 as $value) { echo "Value: $value<br />\n"; } foreach ($arr2 as $key => $value) { echo "Key: $key; Value: $value<br />\n"; } In Objective-C ?
Thank you
$arr1 --- > NSArray Or NSMutabelArray
$arr2 --- > NSDictionary or NSMutabelDictionary.
See accessing values from NSDirectiory.
NSDirectiory* arr2; for (NSString* myKey in arr2) { id value = [arr2 objectForKey:myKey]; } See accessing values from NSMutableArray.
NSMutableArray * arr1; for (id* object in arr1) { //id hold the value of your object stored in array. } 
For an array
NSMutableArray *arr1 = [NSMutableArray arrayWithObjects:@"1", @"2", @"a", @"b", nil]; for (NSString *obj in arr1) { // do stuff } And for a map
NSMutableArray *keys = [NSMutableArray arrayWithObjects:@"1", @"2", @"3", @"4", nil]; NSMutableArray *values = [NSMutableArray arrayWithObjects:@"a", @"b", @"c", @"d", nil]; NSDictionary *dict = [NSDictionary dictionaryWithObjects:keys forKeys:values]; for (id key in dict) { id value = [dict valueForKey:key]; // do stuff with value } 