I am trying to implement iOS Push-Notifications using the Parse.com SDK.
The problem is, that sometimes the Push Notification is not being sent without any error log. I have changed the code to this:
- (IBAction)send:(id)sender {
PFQuery *usernameQuery = [PFUser query];
[usernameQuery whereKey:#"objectId" containedIn:self.recipients];
PFQuery *pushQuery = [PFInstallation query];
[pushQuery whereKey:#"user" matchesQuery:usernameQuery];
PFPush *push =[[PFPush alloc] init];
[push setQuery:pushQuery];
[push setMessage:[NSString stringWithFormat:#"%#: %#", [PFUser currentUser].username, self.kwik]];
[push sendPushInBackground];
[self.navigationController popToRootViewControllerAnimated:YES];
NSLog(#"%p", push);
}
I don't know if this problem is still happening with the PFPush being allocated everytime the user is sending a push.
Before I have changed the code to this one, I was calling self.push = [[PFPush alloc] init]; in the viewDidLoad method, because I didn't like to allocate a new PFPush everytime the user is sending a Push-Notification because of memory usage.
My question now is: Is it important to allocate a new PFPush object everytime the user sends a push or can I allocate it in the viewDidLoad method?
The line:
PFPush *push =[[PFPush alloc] init];
creates an object, but references to it are short-lived (the time it takes to complete the asynch push request), and in an ARC project, code will be inserted at compile time to free it, so there's no need to worry about memory allocation.
You may have an unrelated problem getting the push to send. One way to debug is to use the block variety of push in background called sendPushInBackgroundWithBlock. With that you can check the error if there is on.
Related
I am working on an app that allows "current user" to view an event posted by another user. When the current user join the event I'd like to send a push notification to the user who posted the event. I have set up push notification for my app with Parse. I am able to send push notifications to all users via a channel, but I still cannot figure out how to send a push notification to the specific user. I am able to receive the push notifications on my phone.
I tried to associate the device with a user with the following code:
PFInstallation *installation = [PFInstallation currentInstallation];
installation[#"user"] = [PFUser currentUser];
[installation saveInBackground];
Unfortunately - this makes my app crash. Not sure why there is not error message.
I was thinking of using the following code to send the push notification to a specific user. (This is code i got from Parse Documentation)
// Create our Installation query
PFQuery *pushQuery = [PFInstallation query];
[pushQuery whereKey:#"injuryReports" equalTo:YES];
// Send push notification to query
PFPush *push = [[PFPush alloc] init];
[push setQuery:pushQuery]; // Set our Installation query
[push setMessage:#"Willie Hayes injured by own pop fly."];
[push sendPushInBackground];
How do you associate the installation with the current user?
Am I in the right track?
If you know of a good tutorial, please let me know or if you have implemented something similar and could help me with this problem.
Thank you,
You first need to create a relationship between a user and it's installation. Remember that notifications on iOS are send to devices as the Apple notification system knows nothing about your users.
[[PFInstallation currentInstallation] setObject:[PFUser currentUser] forKey:#"user"];
[[PFInstallation currentInstallation] saveEventually];
Now your code is easier to use:
// Create our Installation query
PFQuery *pushQuery = [PFInstallation query];
// only return Installations that belong to a User that
// matches the innerQuery
[query whereKey:#"user" matchesQuery: pushQuery];
// Send push notification to query
PFPush *push = [[PFPush alloc] init];
[push setQuery:pushQuery]; // Set our Installation query
[push setMessage:#"Willie Hayes injured by own pop fly."];
[push sendPushInBackground];
Hi I'm making a messaging app that uses the internet to send messages. I need to give a notification from user a to user b.
I use this code:
if (toUser!= nil){
parseMessage[#"toUser"]=toUser;
//PFPush *push = [[PFPush alloc] init];
// [push setQuery://whatshouldiputhere?];
// [push setMessage:[NSString stringWithFormat: #"New Message from %#!", [PFUser currentUser].username]];
// [push sendPushInBackground];
}
This code is executed when the message is being sent. This just doesn't work. What am I doing wrong? Could you please help me?
Thanks for any help.
Sending Push Notifications from User to User are quite similar to using channels, first you have to do a query to find the user then pass that query into the push notification.
So for example:
User A sends User B a message, you have to do a query to find User B in your backend. You can do that many ways, using channels, arrays etc, but for this example I will use an objectId:
-(void)sendPushNotificationToUserBWithObjectId:(NSString *)objectId {
// Build a query that matches user B's objectId (note you would have to save User B's objectId or retrieve it from a different query
PFQuery *subQuery = [PFUser query];
[subQuery whereKey:#"objectId" equalTo:objectId];
// Build the actual push notification from targeted query
PFQuery *finalQuery = [PFInstallation query];
// only return Installations that belong to a User that matches the subQuery & 'toUser' is objectId
[finalQuery whereKey:toUser matchesQuery:innerQuery];
// Send the notification.
PFPush *push = [[PFPush alloc] init];
[push setQuery:finalQuery];
[push setMessage:#"Message"];
[push sendPushInBackground];
}
You would call it at any time like this:
[self sendPushNotificationToUserBWithObjectId:#"xVyWO18"];
where #"xVyWO18" is User B's objectId
I am creating an app that uses Parse cloud. I am trying to send a message from a user to all others. After writing the message in a textfield and pressing send, the delegate calls the following method and the push is handled as shown below:
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
//hide keyboard
[textField resignFirstResponder];
NSString *message = self.broadcastText.text;
//create a user query
PFQuery *query = [PFUser query];
PFUser *current = [PFUser currentUser];
NSString *currentUsername = current[#"username"];
[query whereKey:#"username" notEqualTo:currentUsername];
//send push in background
PFPush *push = [[PFPush alloc] init];
[push setQuery:query];
[push setMessage:message];
[push sendPushInBackground];
//clear text field
textField.text = #"";
return YES;}
What's happening is when I send the message, the sender (in this case me) is receiving the push notification as well. What I tried to do is get the current user's username and then create a user query that queries for all users whose usernames are not equal to the current user's username.
However, it didn't work, the message was also being sent to all users including the sender.
Note: I also tried using [query whereKey:#"username" notEqualTo:currentUsername]; just for debugging, and when I try to send the message, neither the sender nor any other device receives it. (when actually no one should receive it except the sender).
Any help would be greatly appreciated. Thank you.
Your problem is that a PFPush can't take any query, it needs a PFInstallation query. When you store your PFInstallation for each user, you could add a field that points to the current user, something like:
PFInstallation *currentInstallation = [PFInstallation currentInstallation];
currentInstallation[#"user"] = [PFUser currentUser];
[currentInstallation saveInBackground];
Then, do an installation query like this:
PFQuery *installationQuery = [PFInstallation query];
PFUser *current = [PFUser currentUser];
[installationQuery whereKey:#"user" notEqualTo:current];
Then, continue with your push using this query:
PFPush *push = [[PFPush alloc] init];
[push setQuery:installationQuery]; // <<< Notice query change here
[push setMessage:message];
[push sendPushInBackground];
In theory you send push notifications to all users that are subscribed to some channel ok.
Now you have a table with all users and all channels. Some users are subscribed other are not. First create a query for the installation, than find users that are not current user.
PFQuery *pushQuery = [PFInstallation query];
[pushQuery whereKey:"user" notEqualTo:[PFUser currentUser]];
Create a Push object and use this query.
PFPush *push = [[PFPush alloc] init];
[push setQuery:pushQuery]; // Set our Installation query
[push setMessage:#"Ciao."];
[push sendPushInBackground];
In pushQuery you can use other key, example: deviceID,installationID, deviceType etc..
I use Parse Cloud but i never use push notification so you need to try this code.
I have saved user pointer in instalation class. Web backend shows 0 subscribers
I am sending notification using below code
PFQuery *qry = [PFUser query];
[qry getObjectWithId:friendObject.objectId]; //friend object is ok like #"Fefl5x7nhl"
PFQuery *pushQuery = [PFInstallation query];
[pushQuery whereKey:#"user" matchesQuery:qry];
// Send push notification to query
PFPush *push = [[PFPush alloc] init];
NSString *msgString=[NSString stringWithFormat:#"%# :%#",
[newMessage objectForKey:#"userName"],
tfEntry.text];
[push setQuery:pushQuery]; // Set our Installation query
NSDictionary *data = [NSDictionary dictionaryWithObjectsAndKeys:
msgString, #"alert",
#"ursound.caf", #"sound",
#"Increment", #"badge",
// #"Optionally a type was set", #"type",
nil];
[push setData:data];
[push sendPushInBackground];
My installation class does have this user pointer (friend object) and logically it should be receiver of the notification .
AM i missing something? any suggestion would be great . Thanks for your valuable time
As long as you have a column on the Installation class called user that is of type Pointer<My_User> and you've actually populated it, your code should work.
There's a section in the Push Notification documentation that talks about adding data to the Installation class:
https://parse.com/docs/push_guide#sending-queries/iOS
I'm creating and sending push notifications with Parse SDK, however I'm finding that none of my notifications are arriving. Am I doing something wrong? I've set up the App ID and Provisioning Profile correctly because I can send test notifications from Parse.com Dashboard
// Create new Push Notifications
PFQuery *pushQuery = [PFInstallation query];
[pushQuery whereKey:#"user" equalTo:otherUser];
NSString *pushNotificationMessage = [NSString stringWithFormat:#"%# added you",[[PFUser currentUser] username]];
// Send push notification to query
PFPush *push = [[PFPush alloc] init];
[push setMessage:pushNotificationMessage];
NSDictionary *dict = [[NSDictionary alloc] initWithObjectsAndKeys:#"added you",#"Alert", nil];
[push setData:dict];
[push setQuery:pushQuery];
[push sendPushInBackground];
Check 'Push Notification' section in your parse after sending push notification from your device.
Check for subscribers,if subscribers are ZERO it means:
Either query is wrong, not returning users.
User's devices are not registered.
For user's creation and device registration you are using custom
class. It is required to register user with built in parse Users
class.
Hope these things will help you. I faced same problems.