如何更新parse.com中的数据浏览器频道？

Question

I'm using Parse.com to send push notifications between devices through PFQuery as below

PFPush *push = [[PFPush alloc] init];
[push setChannel:[NSString stringWithFormat:@"User%@",id];
[push setMessage:@"You have a new message"];
[push sendPushInBackground];

It works fine. But, If I update the channels to any other object using,

PFInstallation *currentInstallation = [PFInstallation currentInstallation];
[currentInstallation addUniqueObject:@"Giants1" forKey:@"channels"];
[currentInstallation saveInBackground];

The object got added to the channels in Data browser.

I just want to update the channels with the new object, not to add. How to do that? What is the PFquery to update channels?

Answer 1

Try:

currentInstallation.channels = @[ @"Giants1" ];

to replace all existing channels. The method you are currently using is explicitly adding to the existing list.

You should also be able to use setObject:forKey: to replace the list.