I want to be able to send some JSON data from one instance of my iOS app via text message to another device. Then, I want the receiving device to be able to open this data and have the instance of my app on their device consume the JSON that was sent.
So far, I'm seeing that deep-linking using the built-in app delegate function only allows me to pass in a URL, and not static data. I know I can send the data using an MFMessageComposeViewController, but am a bit lost at what to do on the receiving device end to consume this data.
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I am new to Objective c and Parse but if I have an app and I need to get objects when they are created. Like iMessage where it is not checking every few seconds it just gets notified that a new message has been sent to it. In the same way can I have a list of objects reload from parse when a new object is created?
Unfortunately, there is no way that you can do realtime with Parse server. There are two solutions. In my messaging app, I send a push notification to the counterpart. When the notification is delivered, I will call the local Notification Center to update data or the UI.
The second solution would be Firebase. This year after Google I.O. They launched a new version of firebase. Even though the data is organized in a JSON tree, but it now supports almost everything you can imagine. Realtime, file storage, push notification, user authorization...
Please let me know if you have any more questions or details about Parse or Firebase. Good luck.
Imagine a chat app (iOS + Swift), when I send a message, I first save it with state "Sending".
Now I want to change the state to "Sent" only after it arrived at the server.
How can I achieve this?
setValue:withCompletionBlock: won't work, because if I close the app while offline, the block won't be called when I open the app again.
you can let the message model with a parameter named state and save it to local before sending to the server , when you open the app you can check messages with server
So I am using the Mutltipeer Framework for iOS in a game where you shoot dots from one screen to another. To get the dot from one device to the other, I send data via Multipeer and accept data via NSNotification. Sometimes, some data does not get sent. How can I ensure that every piece of information is sent??
My iOS app requires socket communication. I'm following this Ray Wenderlich tutorial for setting up the input and output streams. The server I'm using is Twisted. My app requires sending and receiving fast bursts of data generated by external events like gyroscope data. It is sending/receiving data in form of JSON string. So largely, it's very much like a real-time messaging chat app but sending and receiving is very fast and in bursts.
So my app layout is that I have 1 view controller: DViewContorller and a tabbarcontroller with 3 tableviewcontrollers. I need to send and receive data in all these 4 view controllers, hence I implemented the socket stream initialization in App Delegate. For all the 3 tabs, my App Delegate sets the [self.inputstream setDelegate:self] but when it is in the DViewController it sets the delegate of input stream to a reference of DViewController. In (void)viewWillDisappear of DViewController, I reset the input stream delegate to a reference of AppDelegate to let it regain the control over the inputstream.
For outputstream, the delegate is always set to AppDelegate and never changed.
Both my AppDelegate and DViewController are <NSStreamDelegate> and both implement:
- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent}
{
}
with all the stream event cases implemented.
So basically, my entire setup works well, but only if data is not fast(or for that matter, I cannot seem to pinpoint the exact problem).
So here are a few observations which I have made while testing (with a Simulator-iPhone and iPhone-iPhone setup):
A. SIMULATOR - iPHONE:
Now in this setup, I am able to send data fast and exactly the way I want it to send from Simulator to iPhone, but not from iPhone to Simulator. The iPhone receives all the strings well and acts as per required.
Sending from iPhone to Simulator, simulator can read data only one JSON string at a time, and doesn't work when data is sent fast. If sent fast, then all strings received by the simulator are half(only one half is received). NOTE: The server receives and sends full strings, and all the strings even if it is fast, there is no problem with the server.
If I send data simultaneously, at the same time, from both the Simulator and iPhone, even if fast, both receive and process all the strings well.
B. iPHONE - iPHONE:
Either iPhones (any one of them sending, not both together) can receive data only one JSON string at a time, and both don't work when data is sent fast. If sent fast, then all strings received by the any of the iPhones are half(only one half is received). NOTE: The server receives and sends full strings, and all the strings even if it is fast, there is no problem with the server.
If I send data simultaneously, at the same time, from both the iPhones to each other, even if fast, both receive and process all the strings well.
These observations led me to believe that the iPhone is receiving all fast strings only if it is simultaneously sending something to the server. OR i could be totally wrong, because when the Simulator sends to iPhone, the iPhone is able to receive everything no matter what. I want to know what the simulator is doing differently that the string received from it is taken in as full by the iPhone but not the other way round. Is it that the iPhone sends way too fast than a Simulator, hence all its sent strings don't get registered by the receiver? Somebody help me crack this please!
NOTE: In all cases, the server works perfectly and it sends and receives data in full length, no matter whatever speed. And I'm using iOS 7.
UPDATE 1:
Okay, so been experimenting with it the entire day, I finally made it to work. The thing is, it is exactly what my question statement is, output stream cannot stay idle if you want to receive continuously and fast from the input stream. I don't know why that happens, if anyone could enlighten me please. So the quick-fix I'm using is that whenever I get bytes on input stream, I immediately send blank data to server to keep the output stream active. So now the input stream can read complete data and fast. But I feel it is a wastage of server resources. Plus it's not a reliable solution. I'm looking for a concrete solution. I want to know how the Simulator does it without being bothered about the utilization of output stream. Can anyone help please?
UPDATE 2:
Learning from the previous update, it's not about sending blank data to the server, but i need to send dummy data to the sender if i want to receive the next string from him complete. I need to keep the end-to-end communication alive with dummy/blank data if i want to end/receive data fast and complete. Anyone has had this issue and found a better reliable/concrete way to do it?
I'm just starting to get into app development and have just been learning the uses of Xcode and Objective-C language. Just wondering how an app like snapchat or any other app can send data from one user to another. General answers would suffice just to better my understanding.
How do they test this functionality?
How can they connect peer to peer and send data from one phone to another? Is it all accessed in one database that the app connects to everytime that it pulls down?
When you sign up for an app like this with a registered account is that information stored on the iphone?
Well there are two ways data can be sent to a device. One is the device polls the main server periodically. This can be seen in a pull to refresh scenario. The other is the server can send a push notification to the specific phone and app which causes the data to be received by the device and displayed however the programmer wants. So device to device is essentially one person sending something through a web service call to your server. Your server them packages that information into a Json payload and sends a push notification to the recipient. It seems like its device to device because its so quick, but it requires that you have a server in the middle and of course your server is really sending the push notification to Apple's push server, so there really are two servers involved.
How do they test this functionality?
I would try to do this with real devices, and/or using a network sniffer tool to inspect the send packets.
How can they connect peer to peer and send data from one phone to another? Is it all accessed in one database that the app connects to everytime that it pulls down?
Someones sends you a snap
your app will ask the database every ...min or when you reload if there's something new to load, and gets it from the database if there is something new
When you sign up for an app like this with a registered account is that information stored on the iphone?
Connect to snapchat
get a snap from someone and wait till you can view it
start airplane mode and see if it loads, if it does there are files (temporarily) stored on your iPhone.