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• how to resume facebook session key after user change facebook password

  - by aviavi

  hey i have iphone application that using facebook connect. users login to the iphone application using facebook connect. and then i receive their sessionKey back to my server, and i am using the sesssionkey to post actions to users wall. the iphone application keeps the user logged in allways. which means that every times the user will open the application, he will not need to make login again. the problem is that, when the user change his facebook password the user sessionKey also changes. and when the user enter to my iphone applicaiton, the user is shown as loggedin, and then i recieve to my server the user old sessionkey, and when i try to post to the user wall facebook tells me that the session is inavlid. it is ok because the user change his password and the session changes too. my question is how can i check in the iphone if the session key has changed ? and if it changes to promote the user to make login again.

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• Rechability of Local LAN Ip on iPhone/iPad?

  - by x2on

  Hi, i want to check if an Webserver on on local lan ip is reachable. I checked Apple's Rechability Sample, but this sample says all local lan ip's are reachable. Any Ideas how to check this? Thank's

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• Android: Displaying Video on VideoView

  - by AndroidDev93

  I'm trying to display a video in my sdcard on the video view. Here is my code: String name = Environment.getExternalStorageDirectory() + "/test.mp4"; final VideoView videoView = (VideoView)findViewById(R.id.videoView1); videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { public void onPrepared(MediaPlayer arg0) { videoView.start(); } }); videoView.setVideoPath(name); The file I am trying to open is called test.mp4 and its located within the sdcard folder. I get an error saying the application has unfortunately stopped. I would appreciate it if someone could help me. Thanks. EDIT : I used the debugger and found out that I get an InvocationTargetException. The detailed message says that : Failure delivering result ResultInfo{who=null, request=1001, result=-1, data=Intent { dat=file:///mnt/sdcard/test.mp4 }} to activity : java.lang.NullPointerException EDIT : I looked at the logcat again and it seems to give the error at videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { I'm guessing either videoView or MediaPlayer is null.

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• Resume Activity with back button

  - by Hallik

  I have an application I am creating with a DashboardActivity & a SettingsActivity. On the dashboard, I have one object displayed, but when I go into settings, I want to be able to select/deselect X options. Once the user clicks the back button, I save that data locally and to the server. Once the phone receives a success message from the server that it was stored properly, I want to reload the dashboard. I thought I would do this with the onPause and onResume, but they are called when the DashboardActivity is first created. What would be the best way to reload the dashboard by calling my web service after the settings were saved to the server? Here is what I am doing when the back button is hit @Override public boolean onKeyDown(int keyCode, KeyEvent event) { //Save data to the server once the user hits the back button if ((keyCode == KeyEvent.KEYCODE_BACK)) { SchoolSearchActivity.this.divisionProxy = new DivisionProxy(SchoolSearchActivity.this.saveUserDivisionHandler); SchoolSearchActivity.this.divisionProxy.submitUserDivisions(SchoolSearchActivity.this.userDivisions, SchoolSearchActivity.this.user_id); //SchoolSearchActivity.this.finish(); //Toast.makeText(SchoolSearchActivity.this, "Divisions Saved",Toast.LENGTH_LONG).show(); } return true; } The above opens an HTTP connection, and when the response is received, the handler processes the response. I am going to: 1) throw up a progress dialog box letting the user know it's being submitted to the server, and once a response is received, 2) go back to the previous activity and call the "refresh" webservice again. What's the best way to accomplish 1 & 2?

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• Check if NSURL is Local File

  - by golfromeo

  This is a pretty simple question- how can I check if a NSURL is linking to a local file? I know, RTFM, but I checked the documentation and I don't seem to see any methods related to this. The only methods I did find were -isFileReferenceURL and -isFileURL, but I think these only check if the URL directly links to a file. note: I'm making an iPhone app, so by "local file" I mean a .html file stored in the project's resources. Thanks for any help in advance.

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• insertNewObjectForEntityForName:inManagedObjectContext: returning NSNumber bug?

  - by beinstein

  I'm relatively well versed in CoreData and have been using it for several years with little or no difficulty. For the life of me, I can't figure out why insertNewObjectForEntityForName:inManagedObjectContext: is all of a sudden returning some sort of strange instance of NSNumber. GDB says the returned object is of the correct custom subclass of NSManagedObject, but when I go to print a description of the NSManagedObject itself, I get the following error: *** -[NSCFNumber objectID]: unrecognized selector sent to instance 0x3f26f50 What's even stranger, is that I'm able to set some relationships and attributes using setValue:forKey: and all is good. But when I try to set one specific relationship, I get this error: *** -[NSCFNumber entity]: unrecognized selector sent to instance 0x3f26f50 I've tried everything from clean all targets, to restarting both mac and iPhone, even editing the model so that the relationship in question is to-one instead of to-many. No matter what I do, the same problem appears. Has anyone ever seen anything like this before?

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• Which audio playback technology do I need for this?

  - by mystify

  I have trouble choosing the right audio playback technology. There's a ton of technologies to use on the iPhone, it's so confusing. What I need to do is this: start playing short sounds ranging between 0.1 and 2 seconds high quality playback, no crackle (I heard some of the iPhone audio playback technologies do a crackle sound on start or end, which is bad!) ability to start playback of a sound, while there's already another one playing right now (two, three or more sounds at the same time) What would you suggest here, and why? Thanks :-)

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• UIAlertViewDelegate clickedButtonAtIndex: usefulness?

  - by Ed Marty

  The UIAlertViewDelegate protocol defines two methods, alertView:clickedButtonAtIndex: and alertView:didDismissWithButtonIndex:, which seem to me to be identical in usefulness. Why is there a clickedButtonAtIndex and a didDismissButtonWithIndex when they both do the same thing? I realize there is also a willDismissButtonWithIndex that happens before the alert view is dismissed, but is there any reason to use clickedButtonAtIndex instead of didDismissButtonWithIndex?

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• Getting "Location" header from NSHTTPURLResponse

  - by aspcartman

  Can't get "Location" header from response at all. Wireshark says that i've got one: Location: http://*/index.html#0;sid=865a84f0212a3a35d8e9d5f68398e535 But NSHTTPURLResponse *hr = (NSHTTPURLResponse*)response; NSDictionary *dict = [hr allHeaderFields]; NSLog(@"HEADERS : %@",[dict description]); Produces this: HEADERS : { Connection = "keep-alive"; "Content-Encoding" = gzip; "Content-Type" = "text/html"; Date = "Thu, 25 Mar 2010 08:12:08 GMT"; "Last-Modified" = "Sat, 29 Nov 2008 15:50:54 GMT"; Server = "nginx/0.7.59"; "Transfer-Encoding" = Identity; } No location anywhere. How to get it? I need this "sid" thing.

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• touchesEnded Sound?

  - by NextRev

  I'm trying to play a sound on touchesEnded but I'm having a problem. There are multiple objects that get moved around, so if the below code holds true when any object is moved, it constantly plays the sound. How do I only play it once? -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{ if(CGRectContainsRect([image1 frame], [image2 frame])){ [self playsound]; } }

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• How can I store Google Maps search results in an array?

  - by Thomas

  Hi All, I'm working on an app where I need to query Google for businesses near a current location. How do I go about storing them in an array? I don't want to exit the app and open Google Maps, I want to be able to display the addresses in a list format (Table View, I suppose). Any help would be greatly appreciated. Thanks! Thomas

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• what is the difference between Copy and retain ?

  - by senthilmuthu

  Hi, - (void)setString:(NSString*)newString { string = [newString copy]; } will u tell difference between copy and retain of NSString?

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• Why is my iPad app's UINavigationBar not being shown when run?

  - by Anthony Glyadchenko

  I keep on adding a UINavigationBar to one of my iPad app's views and it doesn't appear neither in portrait nor landscape mode. Thanks!

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• video API iphone

  - by Manish

  Hi, I want to play H.264 video streamed from network. To play video iphone provides the media player API. Does anyone one aware of any documented or undocumented API for decoding and playing single video frame?

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• UIViewController prevent view from unloading

  - by Ican Zilb

  When my iPhone app receives a Memory warning the views of UIViewControllers that are not currently visible get unloaded. In one particular controller unloading the view and the outlets is rather fatal. I'm looking for a way to prevent this view from being unloaded. I find this behavior rather stupid - I have a cache mechanism, so when a memory warning comes - I unload myself tons of data and I free enough memory, but I definitely need this view untouched. I see UIViewController has a method 'unloadViewIfReloadable', which gets called when the Memory Warning comes. Does anybody know how to tell Cocoa Touch that my view is not reloadable? Any other suggestions how to prevent my view from being unloaded on Memory Warning? Thanks in advance

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• how do I call create a name of a button variable in a code, with a number in it? (hard to explain)

  - by Sam Jarman

  Ive got a int, that is changed in a previous method, that now has to be part of the name of a button variable eg int numberFromLastOne; numberFromLastOne = 4; I then want to get 'button4' to do something. Could i use something like this? [[button@"%d", numberFromLastOne] doSomethign:withSomethignElse]; Ive never had to do something this before.... Any ideas would be appreciated :) Sam

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• How will Facebook Authenticate let me ID a user?

  - by Donny P

  I have a website where I need to have data that is ID'd by user. For example, they enter their favorite food: userid favorite food ------ ------------- 1 french fries 2 tacos 3 fish sticks 4 chipotle When I use Facebook Authentication, what identifier will I use for the userid? I'm assuming it's not name, since this would create duplicates. Is it just the person's Facebook ID? Also is the correct API to use for 3rd party websites 'Facebook Connect' or 'Facebook Authorization' or something else?

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• NSOperation for animation loop causes strange scrolling behaviour

  - by Tricky

  Hi, I've created an animation loop which I run as an operation in order to keep the rest of my interface responsive. Whilst almost there, there is still one remaining issue. My UIScrollViews don't seem to be reliably picking up when a user touch ends. What this means is, for example, if a user drags down on a scroll view, when they lift their fingers the scrollview doesn't bounce back into place and the scrollbar remains visible. As if the finger hasn't left the screen. It takes another tap on the scrollview for it to snap to its correct position and the scrollbar to fade away... Here's the loop I created in a subclassed NSOperation: (void)main { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSRunLoop *runLoop = [NSRunLoop currentRunLoop]; _displayLink = [[CADisplayLink displayLinkWithTarget: self selector: @selector(animationLoop:)] retain]; [_displayLink setFrameInterval: 1.0f]; [_displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode: NSRunLoopCommonModes]; while (![self isCancelled]) { NSAutoreleasePool *loopPool = [[NSAutoreleasePool alloc] init]; [runLoop runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]]; [loopPool drain]; } [_displayLink invalidate]; [pool release]; } DOes anyone have any idea what might be going on here, and even better how to fix it... Thanks!

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• wait after presentModalViewController

  - by Cesar

  I need to wait (don't execute the code) after the presentModalViewController until the modal view it's dismissed, it's possible or it's a conceptual error ? -(NSDictionary *)authRequired { [self presentModalViewController:loginRegView animated:YES]; //This view write the settings when dismissed. NSMutableDictionary *ret=[[NSMutableDictionary alloc] init]; [ret setObject:[app.settings get:@"user"] forKey:@"user"]; [ret setObject:[app.settings get:@"pass"] forKey:@"pass"]; return ret; }

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• How do you compile a resource into the binary?

  - by Wonderflonium

  How do you compile a resource into the binary in XCode? That way is doesn't show up inside the application bundle as a file and it's not subject to manipulation by a user (whether good-intentioned or bad). Is this even possible? I'm particularly interested about this in terms of iPhone apps. Any help is appreciated!

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• ZipArchive memory problems on iPhone for large archive

  - by Mithin

  Hi, I am trying to compress multiple files into a single zip archive and I am running into low memory warning. Since the complete zip file is loaded into the memory I guess that's the problem. Is there a way by which I can manage the compression/decompression better using ZipArchive so that not all the data is in the memory at once? Thanks!

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• Accessing objects on one nib file from another nib file

  - by ASN

  I have two nib files - Main.nib and Preference.nib In Main.nib file I have an instance of NSView class.Its window has a NSPopUpButton which on clicking shows a menu .In the menu I have show Preferences menu item. Menu item on clicking shows a preferences panel containing a color well item. On clicking color well a color panel is displayed to choose the color. The problem is how to apply that color to main application window. My preference panel window is in Preference.nib file. So problem is accessing NSView from another Nib Window. Is there a way so that I can make connection between preference panel and my main application window(NSView)

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• Accessory view in UITableView: view doesn't update

  - by Kamchatka

  I'm trying to add checkmarks to items when the user select rows in a table view. However, the view is not refreshed and the checkmarks do no show up: - (void)tableView:(UITableView *)tv didSelectRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell* oldCell = [self tableView:tv cellForRowAtIndexPath:[NSIndexPath indexPathForRow:selectedIndex inSection:0]]; oldCell.accessoryType = UITableViewCellAccessoryNone; if (indexPath.section == 0) { selectedIndex = indexPath.row; } UITableViewCell* newCell = [self tableView:tv cellForRowAtIndexPath:indexPath]; newCell.accessoryType = UITableViewCellAccessoryCheckmark; [tv deselectRowAtIndexPath:indexPath animated:NO]; } What could be a reason for that?

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• Unclickable Seekbar in android listview

  - by cppdev

  Hi, I have a Listview in my application. Listview rows are clickable. I have introduced a seek bar in each row of a Listview. Despite settings android:clickable="false" for Seekbar in layout xml, I am still able to click on it and move seek bar as desired. I don't want Seekbar to be clickbale but I do want Listview row to clickable. Any pointers will be appreciated.

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• int vs NSNumber vs NSInteger

  - by Moshe

  I have a line of code that will work differently depending on the datatypes "day" and "1". I believe it is the following although I will check my source code later. day = day + 1; Does this make sense? What would the differences be?

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