there is a method for PFQuery
PFQuery *query = [PFQuery queryWithClassName:@"class"];
[query whereKey:(NSString *)key containsAllObjectsInArray:(NSArray *)array];
is there similar method to define if there is NO specified object in array? like
[query whereKey:(NSString *)key doesNotContainAllObjectsInArray:(NSArray *)array];
If no, how to code this method by myself?
You can use the whereKey:notContainedIn: method for it.Please have a look at the documentation of Parse. Here's the sudo code from the link.
// Finds scores from anyone who is neither Jonathan, Dario, nor Shawn
NSArray *names = @[@"Jonathan Walsh",
@"Dario Wunsch",
@"Shawn Simon"];
[query whereKey:@"playerName" notContainedIn:names];
whereKey: can actually be an array. playerName just looks like a string field...NSMutableArray *wantedObjects = [[NSMutableArray alloc] init];
[array enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
if (/*do logic to match key or obj*/)
[wantedObjects addObject:obj];
}];
Now you can turn the above enumeration into a function. You can return [wantedObjects copy], which is an NSArray.
If you want to find objects where an Array key does not contain another object, you can simply use notEqualTo: as confirmed by a Parse developer here:
https://www.parse.com/questions/pfquery-not-include-any-object-in-array
