使用 Objective-C 防止接收自己的消息
设置过滤器适用于你将从该特定客户端订阅的所有通道。此客户端过滤器排除将此订户的 UUID 设置为发件人的 UUID 的邮件:
NSString *expression = [NSString stringWithFormat:@"(uuid != '%@'",
self.client.currentConfiguration.uuid];
[self.client setFilterExpression:expression];
发布邮件时,如果希望订阅者端客户端筛选器工作,则需要包含发件人的 UUID:
[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];
}
}];
也可以看看: