PubNub Message Filtering Prevent Receiving Your Own Messages Using Objective-C
Example
Setting a filter applies to all channels that you will subscribe to from that particular client. This client filter excludes messages that have this subscriber's UUID set at the sender's UUID:
NSString *expression = [NSString stringWithFormat:@"(uuid != '%@'",
self.client.currentConfiguration.uuid];
[self.client setFilterExpression:expression];
When publishing messages, you need to include the sender's UUID if you want the subscriber side client filter to work:
[self.client publish:@"message" toChannel:@"group-chat"
withMetadata:@{@"uuid": self.client.currentConfiguration.uuid}
completion:^(PNPublishStatus *status) {
// Check whether request successfully completed or not.
if (!status.isError) {
// Message successfully published to specified channel.
}
else {
// Request processing failed. Handle message publish error.
// Check 'category' property to find out possible issue
// publish can be attempted again using: [status retry];
}
}];
See also:
