什麼是Objective-C的PHP數組（）的

Question

我怎樣才能做到這相當於：

PHP：

$arr1 = array('a', 1, 'b', 5, 'z'); 
$arr2 = array('key1' => 'value1', 'key2' => 'value2'); 
$arr3 = array('key1' => 'value1', 'value2', 'value3'); 

這：

foreach ($arr1 as $value) { 
    echo "Value: $value<br />\n"; 
} 
foreach ($arr2 as $key => $value) { 
    echo "Key: $key; Value: $value<br />\n"; 
} 

在Objective-C？

---

謝謝

Answer 1

對於數組

NSMutableArray *arr1 = [NSMutableArray arrayWithObjects:@"1", @"2", @"a", @"b", nil]; 
    for (NSString *obj in arr1) { 
     // do stuff 
    } 

而對於一個地圖

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 
    } 

Answer 2

$ ARR1 --->NSArray或者NSMutabelArray

$ ARR2 --->NSDictionary或NSMutabelDictionary。

請參閱訪問NSDirectiory中的值。

NSDirectiory* arr2; 
for (NSString* myKey in arr2) 
{ 
    id value = [arr2 objectForKey:myKey]; 
} 

查看來自的NSMutableArray訪問值。

NSMutableArray * arr1; 
for (id* object in arr1) { 
    //id hold the value of your object stored in array. 
}