In Restkit versions before v0.20.0 it used to be a simple enough to check for service unavailability and show appropriate responses.
objectManager.client.serviceUnavailableAlertEnabled = YES;
How can we achieve the same in latest RestKit?
Figured it out myself.
Since RKClient is no more in the latest RestKit it has been replaced by the AFHTTPClient from AFNetworking. The wrapper for reachability in AFNetworking is simple enough to use.
Firstly add the SystemConfiguration.framework to your project.
Then add #import <SystemConfiguration/SystemConfiguration.h> to your .pch file.
Finally register a callback block whenever the network reachability changes.
[objectManager.HTTPClient setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
if (status == AFNetworkReachabilityStatusNotReachable) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"No network connection"
message:#"You must be connected to the internet to use this app."
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
}
}];
This also works when the app is started when no internet connection is present.
Related
I created a webview (BrowserComponent) and added a listener:
BComp.addWebEventListener(BrowserComponent.onMessage, e->{
Display.getInstance().callSerially(()->{
Dialog.show("Message", (String)e.getSource(), "OK", null);
});
});
Then, in the JavaScript of the embedded website, I called cn1PostMessage and postMesage. This works well in the simulator! But when building the application, on Android, it does nothing (cn1PostMessage is undefined and postMessage is not received by the main program).
var msg = "test";
if(window.cn1PostMessage) {
window.cn1PostMessage(msg);
} else {
window.parent.postMessage(msg, '*');
// Tried: window.postMessage(msg, '*');
// Tried: window.top.postMessage(msg, '*');
}
What can I do?
Thanks!
I just tried building the BrowserComponentPostMessageSample, and it seemed to work fine on my Galaxy S8, Android 8.
If you're finding that window.cn1PostMessage is undefined, then either there was a javascript error in page load that prevented that callback from being installed, or your code is running before the CodenameOne initialization code has run.
I have just added support for the "android.webContentsDebuggingEnabled" display property, which will make the app's web views debuggable using Chrome's remote development tools. This will make it easier for your to track down such issues. See usage example:
Display.getInstance().setProperty("android.webContentsDebuggingEnabled", "true");
This will be available in Friday's update (Dec. 6/19).
In the mean time, I recommend starting with the BrowserComponentPostMessageSample and modifying it to suit your needs from there.
Alternatively, if you can post a test case to demonstrate the issue, I can look at it.
I am trying to use FBPlacePickerViewController and it doesn't seem to load any data.
Here is my code:
FBPlacePickerViewController *picker = (FBPlacePickerViewController*)segue.destinationViewController;
picker.navigationController.navigationBarHidden = YES;
picker.delegate = self;
picker.radiusInMeters = 1000;
picker.resultsLimit = 30;
if([TonerAppDelegate instance].lastLocation != nil){
picker.locationCoordinate = [TonerAppDelegate instance].lastLocation.coordinate;
[picker loadData];
}
[TonerAppDelegate instance].lastLocationUpdateFunction = ^{
picker.locationCoordinate = [TonerAppDelegate instance].lastLocation.coordinate;
[picker loadData];
};
It is an embed segue (iOS 6). I verify that the picker is a valid object. The [picker loadData] method does get called, and the coordinate data is perfectly valid. I am not getting any exceptions or warnings. I've allowed my app to access to my location in iOS and I double-verified that in Settings. My iPod is connected to the Internet and the connection works perfectly. All the other apps can use location services without any problem. So, there probably is a problem with my implementation of the place picker. I've also implemented the -(void)placePickerViewControllerDataDidChange:(FBPlacePickerViewController *)placePicker and -(BOOL)placePickerViewController:(FBPlacePickerViewController *)placePicker shouldIncludePlace:(id<FBGraphPlace>) methods of the delegate, and they aren't getting called either. What am I doing wrong?
Thanks,
Can.
Found the answer: I wasn't creating the Facebook session before displaying the place picker. I totally forgot about the session. It'd be nice to see Facebook add an assertion check in loadData method of the picker for an existing Facebook session. I've created the session, and THEN tried my code, and it works perfectly now.
I had some code to post to a friend's facebook wall that upon the deprecation of this via Open Graph I changed to use the deprecated headers and Facebook dialog to include the user in the posting. That has been working for weeks, but seems to have stopped working (worked fine Tuesday, failed Wednesday) in production application (i.e. no code change or re-build.)
I've spent hours trying all sort of things (running on main thread, asserting sessions are live, re-writting to SDK 3.2, uninstalling app/re-installing, completely changing the dialog type and post contents) to restore the ability but whatever I do the dialog immediately dismisses. [Note: There are no developer alerts on our app, and I believe that none of the app settings have changed.]
Here is the code. The facebookManager "performConnectedAction" is from the Facebook sample to ensure an active session (and I assert it w/o problem.) :
NSMutableDictionary *wallPost = [NSMutableDictionary dictionary];
// Content populating not show (and I've tried various simplifications)
// Who to...
[wallPost setObject:_selectedUser.id forKey:kFB_FIELD_TO];
[facebookManager performConnectedAction:^{
FBSession *facebookSession = facebookManager.facebookSession;
Assert( facebookSession.isOpen, #"Need an open Facebook session.");
[FBWebDialogs presentFeedDialogModallyWithSession:facebookSession parameters:wallPost handler:^(FBWebDialogResult result, NSURL *resultURL,NSError *error) {
if ( !!error ) {
[self logEventWithFormat:#"Failed to invite on Facebook [%#]", error];
}
}];
}];
Basically ... not only does the dialog flash up/down, but no callback is given (no error or result provided.) All other parts of the Facebook application continue to operate (our graph calls, our Facebook Friends dialog, and so on.)
I'd appreciate any thoughts on ways to investigate this further. I have filed a bug report:
http://developers.facebook.com/bugs/165456656937602?browse=search_5130e2d7663dd6543665811
I had the same issue and fixed it by delaying the method call like this. My method is fbWallPost
[self performSelector:#selector(fbWallPost) withObject:nil afterDelay:0.5];
I am using Apple Map's in my app and on my view i want to show the driving direction from the user location to the current location that i have on the view, now i just want all this inside my app only i.e i can show the driving direction's on the mapview, I have tried using the apple map application but after i make call to it from my application it takes me to apple's map application where i get the driving direction's but i can not return back into my application so i am thinking that i can do something in my application itself so that i can get the driving directions on my current view itself ..
NSString* addr = [NSString stringWithFormat:#"http://maps.apple.com/maps?daddr=%1.6f,%1.6f&saddr=%1.6f,%1.6f",coordinate.latitude,coordinate.longitude,mapView.userLocation.coordinate.latitude,mapView.userLocation.coordinate.longitude];
NSURL* url = [[NSURL alloc] initWithString:[addr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
[[UIApplication sharedApplication] openURL:url];
this code takes me to the apple's map app from my native app but i can't return directly back to my app.is there a possible solution so that i can move back to my APP AFTER GETTING THE DRIVING DIRECTIONS ?? (webview didnot work for me.can i add a back button on apple's app or what ).Please help.... Thanks a lot !!
Or Please can any one suggest me a better code for implementing so that i can do all of that in my application only ?
I want an in-app map depicting the navigation routes and driving directions...
This is not the way to achieve the directions,
I have made a sample for you which covers all the iOS versions, New Google Maps and the iOS 6 tom tom maps as well.
Here it is:
if([[[UIDevice currentDevice] systemVersion] compare:#"6.0" options:NSNumericSearch] == NSOrderedDescending){
//6.0 or above
NSString *Destinationlatlong =[NSString stringWithFormat:#"%#,%#",your.latitude,your.longitude];
NSString* addr = [NSString stringWithFormat:#"comgooglemaps://?saddr=%f,%f&daddr=%#",[AppDelegate zDelegate].location.coordinate.latitude,[AppDelegate zDelegate].location.coordinate.longitude, Destinationlatlong];
addr=[addr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL* url = [[[NSURL alloc] initWithString:addr]autorelease];
// NSLog(#"url %#",url);
if ([[UIApplication sharedApplication]canOpenURL:url]) {
[[UIApplication sharedApplication] openURL:url];
}else{
CLLocationCoordinate2D coords =
CLLocationCoordinate2DMake([your.latitude doubleValue],[your.longitude doubleValue]);
MKPlacemark *placeMark = [[MKPlacemark alloc]
initWithCoordinate:coords addressDictionary:nil];
MKMapItem *destination = [[MKMapItem alloc]initWithPlacemark:placeMark];
[destination openInMapsWithLaunchOptions:nil];
}
}else{
NSString *Destinationlatlong =[NSString stringWithFormat:#"%#,%#",your.latitude,your.longitude];
NSString* addr = [NSString stringWithFormat:#"http://maps.google.com/maps?saddr=Current+Location&daddr=%#",Destinationlatlong];
addr=[addr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL* url = [[[NSURL alloc] initWithString:addr]autorelease];
// NSLog(#"url %#",url);
if ([[UIApplication sharedApplication]canOpenURL:url]) {
[[UIApplication sharedApplication] openURL:url];
}else{
UIAlertView *alert=[[[UIAlertView alloc] initWithTitle:#"Warning!" message:#"Device does not support this functionality" delegate:nil cancelButtonTitle:#"Okay" otherButtonTitles: nil]autorelease] ;
[alert show];
}
}
This should get you started. In short, get driving instruction from google api in json, parse it, and display it on your own map using MKPolyline
http://iosguy.com/2012/05/22/tracing-routes-with-mapkit/
With Facebook iOS SDK 3.1.1, I'm performing login using this call -
NSArray *permissions = [[NSArray alloc] initWithObjects: #"email", #"user_birthday", #"user_location", nil];
#try {
return [FBSession openActiveSessionWithReadPermissions:permissions
allowLoginUI:allowLoginUI
completionHandler:^(FBSession *session,
FBSessionState state,
NSError *error) {
[self sessionStateChanged:session
state:state
error:error];
}];
}
#catch { ... }
There are rare cases when this method throws NSInvalidArgumentException with message Access options are not permitted for this account type. The options argument must be nil., this is thrown from [ACAccountStore requestAccessToAccountsWithType:options:completion:].
Checking the Apple's docs of ACAccountStore, I see this comment for that method:
"Certain account types (such as Facebook) require an options dictionary. This method will throw an NSInvalidArgumentException if the options dictionary is not provided for such account types. Conversely, if the account type does not require an options dictionary, the options parameter must be nil."
Apple require this to be nil except for Facebook, but this method IS called from Facebook, so Maybe this is a bug - either at Facebook or at iOS 6.0/.1, but I couldn't find anything on the web about this issue.
Any ideas?
I found a work around for this bug. Note that the bug is described here as well: https://developers.facebook.com/bugs/139251032898548
The Facebook SDK does not do a null check for return value of accountTypeWithAccountTypeIdentifier. See https://github.com/facebook/facebook-ios-sdk/blob/master/src/FBSystemAccountStoreAdapter.m?source=c#L176
To work around the problem, you can do the following check before attempting facebook lgoin:
if ([[[ACAccountStore alloc]init] accountTypeWithAccountTypeIdentifier:#"com.apple.facebook"] == nil) {
NSLog(#"Cannot proceed, not facebook account type identifier");
return;
}