I am developing iPhone chat application.
After run an app, when I clicked any chat room, there is exist delay for 1~2sec while opening the chat room.
This delay will occur only first time after run.
After back to chat room list, when I clicked any chat room again, there is no exist delay.
When I see the whatsapp, there is no any delay and opened the chat room immediately as soon as clicked chat room.
Now, on viewWillAppear, Current chat room messages has been fetched from DB and I called reloadData of UITableView.
Anyone know why there are exist delay?
Or Anyone know perfect architecture to open chat room without any delay?
Please advice me, Thank you.
ChatRoomsViewController class
- (void)viewDidLoad {
...
self.chat_board = [[ChatBoardViewController alloc] initWithNibName:#"ChatBoardViewController" bundle:nil];
UINib *nib = [UINib nibWithNibName:#"ChatBoardRightCell" bundle:nil];
[_chat_board.board_table registerNib:nib forCellReuseIdentifier:#"ChatBoardRightCell"];
nib = [UINib nibWithNibName:#"ChatBoardLeftCell" bundle:nil];
[_chat_board.board_table registerNib:nib forCellReuseIdentifier:#"ChatBoardLeftCell"];
...
}
- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
...
dispatch_async(dispatch_get_main_queue(), ^{
OrientationEnabledNavigation *navcon = (OrientationEnabledNavigation*)self.tabBarController.selectedViewController;
[navcon pushViewController:_chat_board animated:isAnim];
});
...
}
ChatBoardViewController class
- (void)viewWillAppear:(BOOL)animated {
...
[time_sections removeAllObjects];
_messageTotalCount = [[ChatStorage sharedStorage] getMessageCount:chat_id];
if (self.isLoadAll) {
self.showingCount = _messageTotalCount;
[time_sections addObjectsFromArray: [[ChatStorage sharedStorage] getTimeGroups:chat_id count:_messageTotalCount]];
}else{
[time_sections addObjectsFromArray: [[ChatStorage sharedStorage] getTimeGroups:chat_id count:self.showingCount]];
}
[self reloadData];
...
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
...
NSString *identifier = is_owner ? #"ChatBoardRightCell" : #"ChatBoardLeftCell";
ChatBoardCell * cell = [tableView dequeueReusableCellWithIdentifier:identifier];
NSString * parsed_msg = [record objectForKey:#"parsed_message"];
NSDictionary * decoded = [[ChatStorage sharedStorage] decodeStringToDictionary:parsed_msg];
[cell setText:decoded editMode:_edit_mode];
...
return cell;
}
Related
I am using Realm MongoDB for my android app, and I have a problem:
I have different users in my app, and each user has his "cards". The partition of each user's cards is:
"Card=userID".
So, I want to be able to send a card from one user to the other. I do it via a link that includes userID and specific cardID.
So my code looks something like:
Realm.init(this);
mainApp = new App(new AppConfiguration.Builder(APP_ID).defaultSyncErrorHandler((session, error) ->
Log.e("TAG()", "Sync error: ${error.errorMessage}")
).build());
//TEMP CODE
String partition = "Card=611d7n582w36796ce34af106"; //test partition of another user
if(mainApp.currentUser() != null) {
SyncConfiguration config = new SyncConfiguration.Builder(
mainApp.currentUser(),
partition)
.build();
Realm realmLinkCard = Realm.getInstance(config);
Log.d(TAG, "onCreate: cards found- " + realmLinkCard.where(Card.class).findAll().size());
}
The last log always shows 0. I know there are cards for sure because if the user that created the corresponding partition is signed in then it does find the cards.
permissions are set to true for both read and write for the whole sync.
What can the problem be?
You cannot access a Realm by a user who has a different partition.
Instead you can create a mongodb function and call it from your user.
Make your function here:
Check here on How to create a function
And call it by checking here on How to call a function from client
Quick example of a realm function:
exports = async function funcName(partition) {
const cluster = context.services.get('myclustername');
const mycollection = cluster.db('mydbname').collection('mycollectionname');
let result = [];
try {
result = mycollection.findOne({
_partition: partition,
});
} catch (e) {
result.push(e);
return result;
}
return result;
};
To call it, please see above for the documentation as I'm not an Android developper.
my development team and I have run into an issue on our Android distribution of our Xamarin project. The issue is as such: The application uses an observable collection of objects and represents these objects in the form of a list view and a map view with pins representing the objects. In the map view, our code is designed to subscribe to a messaging center call that periodically updates the observable collection of objects from our API (other part of project). The issue we are having is that when we call PlotPins method in the messaging center code block, the application should first retrieve the updated list and then access that list to plot pins on the map. Every time an update is received, the application will clear all pins from the map and then replot the pins based on the updated list (inefficient we know, but this is a temporary solution). However, the pins are never updated. Through the use of the debugger we have discovered that once map.Pins.Clear() within PlotPins() is called, the application jumps to the end of the RequestUpdatedListAsync method (which occurs periodically to retrieve the updated list and which triggers the Messaging Center) and then halts.
Our solution works for our GTK build, with the pins being cleared and redrawn on the map as intended, so this seems to be an Android specific issue.
Any help would be appreciated, thank you.
Relevant code located below:
MESSAGING CENTER:
MessagingCenter.Subscribe<object, ObservableCollection<MyObject>>(Application.Current, Constants.ListUpdateContract, (sender, newList) =>
{
//update list
listUpdater.UpdateList(newList);
//call method to plot pins again
PlotPins(map);
});
PLOTPINS:
private void PlotPins(Map map)
{
map.Pins.Clear();
foreach (MyObject in MyObjects)
{
var pin = new Pin
{
Label = MyObject.ID,
Address = "Latitude: " + MyObject.Latitude + " " + "Longitude: " + MyObject.Longitude,
Type = PinType.Place,
Position = new Position(Convert.ToDouble(MyObject.Latitude), Convert.ToDouble(MyObject.Longitude))
};
//event handler for when user clicks on pin's info window
pin.InfoWindowClicked += async (s, args) =>
{
//opens up detail page for pin associated with myObject
await Navigation.PushAsync(new DetailPage(MyObject));
};
map.Pins.Add(pin);
}
}
REQUEST UPDATED LIST ASYNC:
public static async System.Threading.Tasks.Task<bool> RequestUpdatedListAsync()
{
if (!_tokenIsGood)
return false;
var success = false;
var response = new HttpResponseMessage();
try
{
response = await _client.GetAsync(Constants. MyObjectDisplayUrl);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("Error requesting updated list.");
System.Diagnostics.Debug.WriteLine(e.Message);
System.Diagnostics.Debug.WriteLine(e.StackTrace);
return success;
}
response.EnsureSuccessStatusCode();
success = true;
var responseBody = await response.Content.ReadAsStringAsync();
// Update list
MyObjects.Clear();
MyObjects = JsonConvert.DeserializeObject<ObservableCollection< MyObject >>(responseBody);
//Alert subscribed ViewModels to update list
MessagingCenter.Send<object, ObservableCollection< MyObject >>(Application.Current, Constants.ListUpdateContract, units);
return success;
}
Since maps.Pins is UI related it has to be run in main UI thread.
MessagingCenter doesnt always publish/subscribe in main threads .
So to fix this issue call the maps.Pins.Clear() in main thread.
Device.BeginInvokeOnMainThread(()=> maps.Pins.Clear());
Credits: #shanranm for mentioning limitation of MessagingCenter for using main threads.
I have an odd issue I can't explain the reason for it - maybe someone here can shed some light on it
I have a ticket scanning app in Xamarin Forms currently testing it on android
the interface allows you to:
type an order number and click the check order Button
use the camera scanner to scan which automatically triggers check order
use the barcode scanner to scan which automatically triggers check order
after the check order validation, user has to select the number of tickets from a drop down list and press confrim entry button
what I'm trying to do, is if the seats available on that ticket is just 1 - then automatically trigger confirm entry button functionality
problem that I have is that - some of my logic depends on setting the drop down index in code - for some reason it doesn't update - as seen in the debugger shot here
and this is the second tme I've noticed this today, earlier it was a var I was trying to assign a string and it kept coming up as null - eventually I replaced that code
is this a bug in xamarin ?
code has been simplified:
async void OnCheckOrderButtonClicked(object sender, EventArgs e)
{
await ValidateOrderEntry();
}
private async void scanCameraButton_Clicked(object sender, EventArgs e)
{
messageLabel.Text = string.Empty;
var options = new ZXing.Mobile.MobileBarcodeScanningOptions();
options.PossibleFormats = new List<ZXing.BarcodeFormat>() {
ZXing.BarcodeFormat.QR_CODE,ZXing.BarcodeFormat.EAN_8, ZXing.BarcodeFormat.EAN_13
};
var scanPage = new ZXingScannerPage(options);
scanPage.OnScanResult += (result) =>
{
//stop scan
scanPage.IsScanning = false;
Device.BeginInvokeOnMainThread(async () =>
{
//pop the page and get the result
await Navigation.PopAsync();
orderNoEntry.Text = result.Text;
//automatically trigger update
await ValidateOrderEntry();
});
};
await Navigation.PushAsync(scanPage);
}
private async Task ValidateOrderEntry()
{
//...other code....
checkInPicker.Items.Clear();
if (availablTickets == 1)
{
checkInPickerStack.IsVisible = true;
checkInPicker.SelectedIndex = 0;
messageLabel.Text = "Ticket OK! - " + orderNoEntry.Text;
messageLabel.TextColor = Color.Green;
//select the only element
checkInPicker.SelectedIndex = 0;
await PostDoorEntry();
}
//...other code....
}
private async Task PostDoorEntry()
{
int entryCount = checkInPicker.SelectedIndex + 1;
//... more code...
//...post api code..
}
Maybe I'm overlooking something, but you clear all the items a few lines above the one you are pointing out. That means there are no items in your Picker and thus you can't set the SelectedIndex to anything other than -1, simply because there are no items.
I want to fetch all contacts in iPhone and android phonebook in my application in AS3. How can this be done in as3?
-Thanks in advance
You're going to need to use a Native Extension.
Check this one out:
https://github.com/memeller/ContactEditor
For iPhone, first you have to add Addressbook and AddressbookUI framework.
Then, for fetching contacts, you have to implement following methods...
- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person property:(ABPropertyID)property identifier:(ABMultiValueIdentifier)identifier
then,, - (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person
and at last - (void)peoplePickerNavigationControllerDidCancel:(ABPeoplePickerNavigationController *)peoplePicker
Now, set return NO
in Second method, call one method....like
[self displayContact:person];
[self dismissModalViewControllerAnimated:YES];
return NO;
and in Third view, set this..[self dismissModalViewControllerAnimated:YES];
Now, for that method...
-(void)displayContact:(ABRecordRef)person
{
name = (__bridge_transfer NSString *)ABRecordCopyValue(person, kABPersonFirstNameProperty);
lblname.text = name;
ABMultiValueRef phNumbers = ABRecordCopyValue(person, kABPersonPhoneProperty);
if(ABMultiValueGetCount(phNumbers) > 0)
{
//NSLog(#"Count is:%ld",ABMultiValueGetCount(phNumbers));
phone = (__bridge_transfer NSString *)ABMultiValueCopyValueAtIndex(phNumbers, 0);
btnsms.hidden = NO;
btnedit.hidden = NO;
}
else
{
phone = #"[NONE]";
}
lblphno.text = phone;
}
By implementing this, you can see name and phone no.in your labels....:)
I am currently developing an Android application using Flex 4.5.1 and I am having an issue when trying to pass data that I have stored in a SharedObject array to my Web Service for a Database query. the code below shows how I am storing the data in the SharedObject:
var so:SharedObject = SharedObject.getLocal("app");
public var prefsArray:ArrayCollection = new ArrayCollection(so.data.prefs);
protected function prefs_btn_click(event:MouseEvent):void
{
prefsArray.source.push(getFrsByIDResult.lastResult.id);
so.data.prefs = [prefsArray];
var flushStatus:String = so.flush();
if (flushStatus != null) {
switch(flushStatus) {
case SharedObjectFlushStatus.PENDING:
so.addEventListener(NetStatusEvent.NET_STATUS,
onFlushStatus);
break;
case SharedObjectFlushStatus.FLUSHED:
trace("success");
break;
}
}
}
protected function onFlushStatus(event:NetStatusEvent):void
{
trace(event.info.code);
}
I have tested the SharedObject to see if the information is being entered into it correctly and all seems fine. Now I have used the code below in order to retrieve the data from the SharedObject and try and send it to the PHP web Service to run the DB query.
var so:SharedObject = SharedObject.getLocal("app");
var arrCol:ArrayCollection = new ArrayCollection(so.data.prefs);
var str:String = new String(arrCol.toString());
protected function list_creationCompleteHandler(event:FlexEvent):void
{
getPrefsByprefIdsResult.token = prefsService.getPrefsByPrefIds(so.data.prefs);
}
I have tested the Webservice in Flex and have it configured to recieve an Array of Ints (int[]) and it works when i run a test operation on it with two dummy values. However when I try to use the code above to pass the Web Service the Shared Object data I get this error:
TypeError: Error #1034: Type Coercion failed: cannot convert []#97e97e1 to mx.collections.ArrayCollection.
at views::**************/list_creationCompleteHandler()[C:\Users\Jack\Adobe Flash Builder 4.5\****************\src\views\*******************.mxml:25]
at views::*********************/__list_creationComplete()[C:\Users\Jack\Adobe Flash Builder 4.5\****************\src\views\***************.mxml:94]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:13128]
at mx.core::UIComponent/set initialized()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:1818]
at mx.managers::LayoutManager/validateClient()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1090]
at mx.core::UIComponent/validateNow()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:8067]
at spark.components::ViewNavigator/commitNavigatorAction()[E:\dev\4.5.1\frameworks\projects\mobilecomponents\src\spark\components\ViewNavigator.as:1878]
at spark.components::ViewNavigator/commitProperties()[E:\dev\4.5.1\frameworks\projects\mobilecomponents\src\spark\components\ViewNavigator.as:1236]
at mx.core::UIComponent/validateProperties()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:8209]
at mx.managers::LayoutManager/validateProperties()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\managers\LayoutManager.as:597]
at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\managers\LayoutManager.as:783]
at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1180]
I have replaced certain filenames and locations with *'s to protect the work i am doing, but can someone please help me with this issues as I believe it has to be something simple???
Thanks
ok so let me explain in more detail. This is being designed for an Android app like I said, but image what I am trying to do is to store Bookmarks persistently using the Local Shared Object.
The first chunck of code you see above is designed to create the LSO attribute for the bookmark i want to create and imagine that there can be more than one bookmark set at different times like in a web browser. The only way i could find to do this was to store these items/details in an array which I retrieve and then update before saving back to the LSO and saving.
The second piece of code related to imagine a "Bookmarks Page" with a list of all the content that I have bookmarked. Now what I wanted to happen was thta I would be able to call up the LSO attribute which held the id's of the bookmarks and then load up thier details in a list format.
I have managed to create the LSO and store the bookmark deatils in and allow them to be updated and entries added. Also I have made sure that the PHP code that I have pulls back all the database objects relating to the array of id's and this has been tested using flex. The only thing that I cant seem to do is to pass the id's to the PHP web service file. The code in the Web Service file is below if that helps:
public function getPrefsByPrefIds($PrefIds) {
$stmt = mysqli_prepare($this->connection, "SELECT * FROM $this->tablename WHERE $this->tablename.id IN(" .implode(",", $PrefIds). ")");
$this->throwExceptionOnError();
mysqli_stmt_execute($stmt);
$this->throwExceptionOnError();
$rows = array();
mysqli_stmt_bind_result($stmt, $row->id, $row->name, $row->desc);
while (mysqli_stmt_fetch($stmt)) {
$rows[] = $row;
$row = new stdClass();
mysqli_stmt_bind_result($stmt, $row->id, $row->name, $row->desc);
}
mysqli_stmt_free_result($stmt);
mysqli_close($this->connection);
return $rows;
}
Yes I had already tried that but thanks. I have made some more progress on my own as I have been experimenting with the different types of objects that can be stored in SharedObjects. I have managed to get the solution part working with this code:
This code is designed to capture the boomark info and store it in an arrayCollection before transferring it to a bytesArray and saving
var so:SharedObject = SharedObject.getLocal("app");
public var prefArray:ArrayCollection = new ArrayCollection(so.data.prefs);
protected function prefs_btn_click(event:MouseEvent):void
{
prefArray.source.push(getCompaniesByIDResult.lastResult.id);
so.data.prefs = [prefArray];
var bytes:ByteArray = new ByteArray();
bytes.writeObject(prefArray);
so.data.ac = bytes;
var flushStatus:String = so.flush();
if (flushStatus != null) {
switch(flushStatus) {
case SharedObjectFlushStatus.PENDING:
so.addEventListener(NetStatusEvent.NET_STATUS,
onFlushStatus);
break;
case SharedObjectFlushStatus.FLUSHED:
trace("success");
break;
}
}
}
protected function onFlushStatus(event:NetStatusEvent):void
{
trace(event.info.code);
}
This next code is the designed to retrieve that information from the SahredObjects bytesArray and put it back into an Array Collection
var so:SharedObject = SharedObject.getLocal("app");
var ba:ByteArray = so.data.ac as ByteArray;
var ac:ArrayCollection;
protected function list_creationCompleteHandler(event:FlexEvent):void
{
ba.position = 0;
ac = ba.readObject() as ArrayCollection;
getPrefsByPrefIdsResult.token = prefsService.getPrefsByPrefIds(ac);
}
however as I have said this works in a small way only as if I store only one Bookmark (id) for an item and then go to the bookmarks list the details for that bookark are successfully retrieved, however if I save more than one Bookmark(2 or more id's) the page will not load the details, i do not get an error but I believe it is hanging because it is looking for say id's "1,2" instead of "1" and "2" but i dont know why this is or how to resolve this. I appreciate the advice I have been given but am finding it hard there is no one who can help me with this issue and I am having to do various experiemnts with the code. Can someone please help me with this I would really appreciate it :-) Thanks