解析IOS删除key = objectID的所有对象

Question

是否有一种简单的方法可以删除满足特定条件的特定类(即消息)中的所有对象,例如"UserID"= user,以便删除与特定用户关联的消息类中的所有行？

Answer 1

试试这个,

 PFQuery *query = [PFQuery queryWithClassName:@"messages"];
 [query whereKey:@"UserID" equalTo:@"user"];
 [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
 if (!error) {
     // The find succeeded.
     NSLog(@"Successfully retrieved %d scores.", objects.count);
     // Do something with the found objects
     for (PFObject *object in objects) {
         [object deleteInBackground];
     }
 } else {
     // Log details of the failure
     NSLog(@"Error: %@ %@", error, [error userInfo]);
 }
}];

更新

更换

for (PFObject *object in objects) {
    [object deleteInBackground];
}

同

[PFObject deleteAllInBackground:objects];

感谢mikewoz的更新.