If you have an array of dictionaries, how do I create a new array containing all the keys present for each dictionary in the array ?
NSArray *array = @[@{@"key1" : @"value 1"},
@{@"key2" : @"value 2"},
@{@"key3" : @"value 3"} ];
// how to achieve this?
NSArray *allKeys = @{@"key1", @"key2", @"key3"};
plz use this code, I think it helps you
NSArray *array = @[@{@"key1" : @"value 1"},
@{@"key2" : @"value 2"},
@{@"key3" : @"value 3"} ];
NSMutableArray *key_array=[NSMutableArray array];
for (NSDictionary *dictionary in array) {
NSArray *key_dictionary=[dictionary allKeys];
for (NSString *string_key in key_dictionary) {
[key_array addObject:string_key];
}
}
NSLog(@"%@",key_array);