&gt; &quot;ARC is available in Xcode 4.2, currently in beta, and only when
&gt; compiling with Clang (a.k.a. &quot;Apple LLVM compiler&quot;). The setting is
&gt; called, obviously enough, &quot;Objective-C Automatic Reference Counting&quot;.
&gt; Turn it on, and off you go.
&gt; 
&gt; If you&#39;re working on existing code, changing this setting will produce
&gt; an enormous quantity of errors. ARC not only manages memory for you,
&gt; but it forbids you from trying to do it yourself. It&#39;s illegal to
&gt; manually send retain/release/autorelease when using ARC. Since normal
&gt; non-ARC Cocoa code is littered with this stuff, you&#39;ll get a lot of
&gt; errors.
&gt; 
&gt; Fortunately, Xcode offers a tool to convert existing code. **Select Edit
&gt; -&gt; Refactor... -&gt; Convert to Objective-C ARC**... and Xcode will guide you through converting your code. Although there may be some
&gt; situations where it needs help figuring out what to do, the process
&gt; should be largely automatic.&quot;

I took that from this link, helped me a lot:
http://www.mikeash.com/pyblog/friday-qa-2011-09-30-automatic-reference-counting.html

Select your project or target and then go to **Build Settings** and under the section **Apple LLVM compiler 3.0 - Language** you will see the option **Objective-C Automatic Reference Counting**.

For towpse, in Xcode 4.6 you will need to look for &quot;CLANG_ENABLE_OBJC_ARC&quot; and then change it to &quot;Yes&quot; to enable.

I have a custom map with an information bubble and custom markers. When I zoom into points of interest such as parks and universities appear and when I click an information window opens. How do I disable the info window?

My code is as follows:

    var geocoder;
    var map;
    var infoBubble;
    var dropdown = &quot;&quot;;
    var gmarkers = [];

    var hostel_icon = new google.maps.MarkerImage(&#39;/resources/hostel_blue_icon.png&#39;,
    new google.maps.Size(28,32),
    new google.maps.Point(0,0),
    new google.maps.Point(14,32));

    var bar_icon = new google.maps.MarkerImage(&#39;/resources/bar_red_icon.png&#39;,
    new google.maps.Size(28,32),
    new google.maps.Point(0,0),
    new google.maps.Point(14,32));

    var icon_shadow = new google.maps.MarkerImage(&#39;/resources/myicon_shadow.png&#39;,
    new google.maps.Size(45,32),
    new google.maps.Point(0,0),
    new google.maps.Point(12,32));

    var customIcons = {
        hostel: {
            icon: hostel_icon,
            shadow: icon_shadow
        },
        bar: {
            icon: bar_icon,
            shadow: icon_shadow
        }
    };

    function initialize() {
        var latlng = new google.maps.LatLng(12.82364, 26.29987);
        var myMapOptions = {
            zoom: 2,
            center: latlng,
            panControl: false,
            scaleControl: true,
            mapTypeId: google.maps.MapTypeId.TERRAIN,
            mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR},
            navigationControlOptions: {style: google.maps.NavigationControlStyle.DEFAULT}
        }
        map = new google.maps.Map(document.getElementById(&quot;map_canvas&quot;), myMapOptions);

        infoBubble = new InfoBubble({
            shadowStyle: 0,
            padding: 0,
            backgroundColor: &#39;rgb(57,57,57)&#39;,
            borderRadius: 5,
            arrowSize: 10,
            borderWidth: 1,
            maxWidth: 400,
            borderColor: &#39;#2c2c2c&#39;,
            disableAutoPan: false,
            hideCloseButton: true,
            arrowPosition: 50,
            backgroundClassName: &#39;phoney&#39;,
            arrowStyle: 0
        });

        // Change this depending on the name of your PHP file
        downloadUrl(&quot;phpsqlajax_genxml_2.php&quot;, function(data) {
            var xml = parseXml(data);
            var markers = xml.documentElement.getElementsByTagName(&quot;marker&quot;);
            for (var i = 0; i &lt; markers.length; i++) {
                var bar_name = markers[i].getAttribute(&quot;bar_name&quot;);
                var hostel_name = markers[i].getAttribute(&quot;hostel_name&quot;);
                var street = markers[i].getAttribute(&quot;street&quot;);
                var city = markers[i].getAttribute(&quot;city&quot;);
                var postcode = markers[i].getAttribute(&quot;postcode&quot;);
                var country = markers[i].getAttribute(&quot;country&quot;);
                var page = markers[i].getAttribute(&quot;page&quot;);
                var map_photo = markers[i].getAttribute(&quot;map_photo&quot;);
                var type = markers[i].getAttribute(&quot;type&quot;);
                var category = markers[i].getAttribute(&quot;category&quot;);
                var point = new google.maps.LatLng(
                parseFloat(markers[i].getAttribute(&quot;lat&quot;)),
                parseFloat(markers[i].getAttribute(&quot;lng&quot;)));

                var html = &#39;&lt;div class=&quot;infowindow&quot;&gt;&lt;div class=&quot;iwPhoto&quot; style=&quot;width: 105px; height: 65px;&quot;&gt;&#39; + &quot;&lt;a href=&#39;&quot; + page + &quot;&#39;&gt;&lt;img src=&#39;&quot; + map_photo + &quot;&#39; alt=&#39;&#39;/&gt;&lt;/a&gt;&quot; + &#39;&lt;/div&gt;&lt;div class=&quot;iwName&quot; style=&quot;height: 24px;&quot;&gt;&#39; + &quot;&lt;a href=&#39;&quot; + page + &quot;&#39;&gt;&quot; + hostel_name + &quot;&lt;/a&gt;&quot; + &#39;&lt;/div&gt;&lt;div class=&quot;iwCategory&quot; style=&quot;height: 15px;&quot;&gt;&#39; + category + &#39;&lt;/div&gt;&lt;div class=&quot;iwCity&quot; style=&quot;height: 29px;&quot;&gt;&#39; + &quot;&lt;a href=&#39;&quot; + page + &quot;&#39;&gt;&quot; + city + &quot;&lt;/a&gt;&quot; + &#39;&lt;div class=&quot;iwArrow&quot; style=&quot;width: 29px; height: 29px;&quot;&gt;&#39; + &quot;&lt;a href=&#39;&quot; + page + &quot;&#39;&gt;&lt;img src=&#39;/resources/arrow.png&#39;/&gt;&lt;/a&gt;&quot; + &#39;&lt;/div&gt;&lt;/div&gt;&lt;/div&gt;&#39;;

                var icon = customIcons[type] || {};
                var marker = new google.maps.Marker({
                    map: map,
                    position: point,
                    icon: icon.icon,
                    shadow: icon.shadow,
                    title: bar_name
                });
                marker.bar_name = bar_name;
                marker.category = category;
                bindInfoBubble(marker, map, infoBubble, html, bar_name);

                gmarkers.push(marker);

                str = &#39;&lt;option selected&gt; - Select a club - &lt;/option&gt;&#39;;
                for (j=0; j &lt; gmarkers.length; j++){
                    str += &#39;&lt;option value=&quot;&#39;+gmarkers[j].bar_name+&#39;&quot;&gt;&#39;+gmarkers[j].bar_name+&#39;, &#39;+gmarkers[j].category+&#39;&lt;/option&gt;&#39;;
                }
                var str1 =&#39;&lt;form name=&quot;form_city&quot; action=&quot;&quot;&gt;&lt;select style=&quot;width:150px;&quot; id=&quot;select_city&quot; name=&quot;select_cityUrl&quot; onchange=&quot;handleSelected(this);&quot;&gt;&#39;;
                var str2 =&#39;&lt;/select&gt;&lt;/form&gt;&#39;;
                dropdown = str1 + str + str2;
            }
            document.getElementById(&quot;dd&quot;).innerHTML = dropdown;
        });
    }

    function handleSelected(opt) {
        var indexNo = opt[opt.selectedIndex].index;
        google.maps.event.trigger(gmarkers[indexNo-1], &quot;click&quot;);
    }

    function bindInfoBubble(marker, map, infoBubble, html) {
        google.maps.event.addListener(marker, &#39;click&#39;, function() {
            infoBubble.setContent(html);
            infoBubble.open(map, marker);
            google.maps.event.addListener(map, &quot;click&quot;, function () {
                infoBubble.close();
            });
        });
    }

    function downloadUrl(url, callback) {
        var request = window.ActiveXObject ?
                      new ActiveXObject(&#39;Microsoft.XMLHTTP&#39;) :
                      new XMLHttpRequest;

        request.onreadystatechange = function() {
            if (request.readyState == 4) {
                request.onreadystatechange = doNothing;
                callback(request.responseText, request.status);
            }
        };

        request.open(&#39;GET&#39;, url, true);
        request.send(null);
    }

    function parseXml(str) {
        if (window.ActiveXObject) {
            var doc = new ActiveXObject(&#39;Microsoft.XMLDOM&#39;);
            doc.loadXML(str);
            return doc;
        } else if (window.DOMParser) {
            return (new DOMParser).parseFromString(str, &#39;text/xml&#39;);
        }
    }

    function doNothing() {}


Disable point-of-interest information window using Google Maps API v3

After researching this issue for a couple of hours, I found that one of the most efficient ways to toggle a page element&#39;s display (in HTML) is to do something like:

    // showing
    document.getElementById(&#39;element&#39;).style.display = &#39;&#39;;
    
    // hiding
    document.getElementById(&#39;element&#39;).style.display = &#39;none&#39;;
    

**Simple question:** What does `style.display = &#39;&#39;` actually do?

Does it &quot;reset&quot; the original display property?

Or does it remove the display property, thereby using the default style for display?

..........................................

**Would be nice to know:** Does anyone know of any links to any kind of documentation about this? 

(Yes, I have Google-d this issue, but I&#39;m probably not entering the right search term and keep coming up with completely un-related search results.)



Thanks for any suggestions or links.

What does style.display = &#39;&#39; actually do?

I have an iOS app that I want to convert to using **ARC**. I would just use the migration tool, but it errors out for me consistently during the preview phase.

I know I can use the `-fobjc-arc` compiler directive on a file-by-file basis, but I want to enable **ARC** on the entire project, then turn off individual classes using `-fno-objc-arc`. 

New projects in 4.2 can use ARC by default, so there must be a switch somewhere.

Can anyone help me to convert the project to `ARC`



How do you enable ARC project-wide in Xcode 4.2

I have an iOS app that I want to convert to using ARC. I would just use the migration tool, but it errors out for me consistently during the preview phase.
I know I can use the <code>-fobjc-arc</code> compiler directive on a file-by-file basis, but I want to enable ARC on the entire project, then turn off individual classes using <code>-fno-objc-arc</code>.
New projects in 4.2 can use ARC by default, so there must be a switch somewhere.
Can anyone help me to convert the project to <code>ARC</code>

In **iOS5** Apple drops the *armv6* architecture from the **ARCHS_STANDARD_32_BIT**.

In order to keep the support for **iPhone3G** I still want to compile in *armv6* even in iOS5.

Did anyone find a solution for this?

How to build for armv6 and armv7 architectures with iOS 5

I have a tableview controller that displays a row of cells. Each cell has 3 buttons. I have numbered the tags for each cell to be 1,2,3. The problem is I don&#39;t know how to find on which cell a button is being pressed. I&#39;m currently only getting the sender&#39;s tag when one of the buttons has been pressed. Is there a way to get the cell row number as well when a button is pressed?

Getting row of UITableView cell on button press

I am new to iPhone development and `objective C`.
I have used `NSUserDefaults` to store some values in my app.
But I don&#39;t know that if there is any limit for storing values in `NSUserDefaults`.
Can anyone help me to know that.

Thanks in advance.

Is there any limit in storing values in NSUserDefaults?

I get the following error in my console:

&gt;Applications are expected to have a root view controller at the end of application launch

Below is my `application:didFinishLaunchWithOptions` method:

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    	
        // Set Background Color/Pattern
        self.window.backgroundColor = [UIColor blackColor];
        self.tabBarController.tabBar.backgroundColor = [UIColor clearColor];
        //self.window.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@&quot;testbg.png&quot;]];
        
        // Set StatusBar Color
        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent];
        
        // Add the tab bar controller&#39;s current view as a subview of the window
        self.window.rootViewController = self.tabBarController;
        [self.window makeKeyAndVisible];
        return YES;
    }

In Interface Builder, the `UITabBarController`&#39;s delegate is hooked up to the App Delegate. 

Anyone know how to fix this issue?

Applications are expected to have a root view controller at the end of application launch

With [work having recently stopped on ASIHTTPRequest][1], it seems like attention is shifting to [AFNetworking][2].

However, I&#39;ve not yet found a good comparison of the features of the two libraries, so I don&#39;t know what I might lose if/when I switch over.

Major differences I&#39;ve spotted so far are:

 1. AFNetworking has a much smaller code size (which is good)
 2. AFNetworking is being rapidly improved (so it may not yet be mature, may not have a stable API yet?)
 3. Both seem to have caching, though I&#39;ve seen hints that because AFNetworking uses [NSURLConnection it won&#39;t cache objects over 50K][3]
 4. ASIHTTPRequest has very good support for manual &amp; automatic (PAC) http proxies; I can&#39;t find any information on what level of support AFNetworking has for proxies
 5. AFNetworking requires iOS 4+, whereas ASIHTTPRequest works right back to iOS 2 (not really an issue for me, but it is an issue for some people)
 6. AFNetworking doesn&#39;t (yet) have a built in persistent cache, but there&#39;s a persistent cache which has a pending pull request: https://github.com/gowalla/AFNetworking/pull/25

Has anyone seen any good comparisons of the two libraries or any documented experiences of switching from one to the other?

  [1]: http://allseeing-i.com/%5Brequest_release%5D;
  [2]: https://github.com/AFNetworking/AFNetworking
  [3]: https://stackoverflow.com/questions/7166422/nsurlconnection-on-ios-doesnt-try-to-cache-objects-larger-than-50kb

What major ASIHTTPRequest features is AFNetworking missing?

When converting a project to use ARC what does &quot;switch case is in protected scope&quot; mean?
I am converting a project to use ARC, using Xcode 4 Edit -&gt; Refactor -&gt; Convert to Objective-C ARC... 
One of the errors I get is &quot;switch case is in protected scope&quot; on &quot;some&quot; of the switches in a switch case.

Edit,
Here is the code:

**the ERROR is marked on the &quot;default&quot; case:**


    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        static NSString *CellIdentifier = @&quot;&quot;;
        UITableViewCell *cell ;
        switch (tableView.tag) {
            case 1:
                CellIdentifier = @&quot;CellAuthor&quot;;
                cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
                if (cell == nil) {
                    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
            }
            cell.textLabel.text = [[prefQueries objectAtIndex:[indexPath row]] valueForKey:@&quot;queryString&quot;];
            break;
        case 2:
            CellIdentifier = @&quot;CellJournal&quot;;
            cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
            if (cell == nil) {
                cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
            }
            cell.textLabel.text = [[prefJournals objectAtIndex:[indexPath row]] valueForKey:@&quot;name&quot;];

            NSData * icon = [[prefJournals objectAtIndex:[indexPath row]] valueForKey:@&quot;icon&quot;];
            if (!icon) {
                icon = UIImagePNGRepresentation([UIImage imageNamed:@&quot;blank72&quot;]);
            }
            cell.imageView.image = [UIImage imageWithData:icon];
            
            break;
            
        default:
            CellIdentifier = @&quot;Cell&quot;;
            cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
            if (cell == nil) {
                initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
                cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
                }
            break;
        }
    
    
        return cell;
    }


When converting a project to use ARC what does &quot;switch case is in protected scope&quot; mean?

This is more of a general annoyance. Every time after stopping the simulator, Xcode jumps to main.m for some reason. On the left nav, it jumps to the Debug Navigator.

Is there a way to fix this?

It&#39;s annoying because I might be testing a certain line of code, and now each time, I need to make a couple of clicks just to go back to that code.

This problem is not new, seems to get worse though. At the time of writing this, I was on the GM seed, but this problem persists in XCode 4.2 final.  This was not a problem in previous versions of XCode.

Xcode 4.2 jumps to main.m every time after stopping simulator

After a recent submission I have gotten the following error:

&gt; Invalid Signature - the nested app bundle (FooBar.app/Contents/Frameworks/GData.framework) is not signed, the signature is invalid, or it is not signed with an Apple submission certificate. Refer to the Code Signing and Application Sandboxing Guide for more information.
&gt;
&gt; Invalid Signature - the nested app bundle (FooBar.app/Contents/Frameworks/Growl.framework) is not signed, the signature is invalid, or it is not signed with an Apple submission certificate. Refer to the Code Signing and Application Sandboxing Guide for more information.
&gt;
&gt; Invalid Signature - the nested app bundle libcurl (FooBar.app/Contents/Frameworks/libcurl.framework) is not signed, the signature is invalid, or it is not signed with an Apple submission certificate. Refer to the Code Signing and Application Sandboxing Guide for more information.

So I signed all the framework bundles per [Technote 2206](http://developer.apple.com/library/mac/#technotes/tn2206/_index.html):


    codesign -f -v -s &quot;3rd Party Mac Developer Application: Name&quot; ./libcurl.framework/Versions/A/libcurl
    codesign -f -v -s &quot;3rd Party Mac Developer Application: Name&quot; ./libcurl.framework/Versions/A/libssh2.1.dylib
    codesign -f -v -s &quot;3rd Party Mac Developer Application: Name&quot; ./Growl.framework/Versions/A/Growl
    codesign -f -v -s &quot;3rd Party Mac Developer Application: Name&quot; ./GData.framework/Versions/A/GData
Technote 2206 says:

&gt;Signing Frameworks
&gt;
&gt;Seeing as frameworks are bundles it would seem logical to conclude that you can sign a framework directly. However, this is not the case. To avoid problems when signing frameworks make sure that you sign a specific version as opposed to the whole framework:
&gt;
&gt;    # This is the wrong way:

&gt;    codesign -s my-signing-identity ../FooBarBaz.framework

&gt;    # This is the right way:

&gt;    codesign -s my-signing-identity ../FooBarBaz.framework/Versions/A

And when I try to verify the results, it looks good to me:

    % codesign -vvv FooBar.app/Contents/Frameworks/libcurl.framework
    FooBar.app/Contents/Frameworks/libcurl.framework: valid on disk
    FooBar.app/Contents/Frameworks/libcurl.framework: satisfies its Designated Requirement
    % codesign -vvv FooBar.app/Contents/Frameworks/Growl.framework
    FooBar.app/Contents/Frameworks/Growl.framework: valid on disk
    FooBar.app/Contents/Frameworks/Growl.framework: satisfies its Designated Requirement

For fun, I did try signing the framework bundle directly and it was still rejected. But that is exactly what the documentation said not to do.

Any guesses why that would be considered invalid? I am using the same cert that I use to code sign my app -- the one that has worked in the past.

My only guess would be something to do with the existing plists (do I need to own the identifiers in the framework&#39;s Info.plists?) or entitlements -- any suggestions?


How do you codesign framework bundles for the Mac App Store?

Every time my app crashes Xcode highlights the UIApicationMain() call in the main() function as the line that caused the crash. In some cases that used to be normal (segmentation fault for example) but the crash I am trying to deal with is a simple SIGABRT with detailed information logged in the console:

    *** Terminating app due to uncaught exception &#39;NSInvalidArgumentException&#39;, reason: &#39;-[__NSCFDictionary setObject:forKey:]: attempt to insert nil value (key: Date)&#39;

Xcode used to show the line just right with older SDKs but since i upgraded to Xocde 4.2 that changed. 
It is pretty obvious that Xcode knows exactly what caused the crash (or could know), but its still not showing the actual line. Is there any fix or workaround for this?

Xcode doesn&#39;t show the line that causes a crash

I use Apple Reachability class from Apple Sample code
[Reachability][1]

in Xcode 4.2 and new Apple 3.0 compiler I get warning in this class that

    + (Reachability*) reachabilityWithAddress: (const struct sockaddr_in*) hostAddress;

*declaration of &#39;struct sockaddr_in*&#39; will not be visible outside of this function* 

I am not good at classic C %) so I dont understand how I can fix this warning or may be I can ignore it at all. 

Thx


  [1]: http://developer.apple.com/library/ios/#samplecode/Reachability/Listings/ReadMe_txt.html

Xcode 4.2 - declaration of &#39;...&#39; will not be visible outside of this function warning

Is there a way to insert a Table Header View (tableHeaderView) in StoryBoard (like we used to do in Interface Builder)?

Table Header Views in StoryBoards

I&#39;m working on an iOS application that needs to play some sounds using the `AVFoundation` framework. The workspace structure in Xcode 4 contains two projects:

- Workspace
  - The application itself (main project)
  - A utility library

After building the utility library, it results in a static library which is used in the main application as a framework.

So, when trying to play a sound inside the main application by using the code below, it works as expected.

    NSString *resourcePath = [[NSBundle mainBundle] resourcePath];
    NSString *path = [NSString stringWithFormat:@&quot;%@/sound.mp3&quot;, resourcePath];

    NSURL *url = [NSURL fileURLWithPath:path];
    NSError *error = nil;

    AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url
                                                                        error:&amp;error];
    [audioPlayer play];

In contrast, when trying to play exactly the same sound (or any other) inside the utility library using the same code as above, no sound is played at all, even though error is _nil_ and the _audioPlayer_ property values are the right ones (number of channels, duration).

I&#39;ve made sure the `AVFoundation` framework is in both projects.

Also, my class uses the `AVAudioPlayerDelegate` protocol and implements these two methods:

    - (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag;
    - (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer *)player error:(NSError *)error;

None of these methods is called after trying to play the sound.

If I use the `AudioToolbox` framework instead, then it plays the sound. But I&#39;m interested in using `AVFoundation` for several reasons.

Any idea of what is going on? Am I missing something about `AVFoundation`? Could it be related to using `AVAudioPlayer` from inside a static library?

Thanks in advance.


AVAudioPlayer not playing any sound

When creating a project in Xcode 4, it asks what Class prefix to add to all new files.

Is there a way to change (or remove) this, after a project is already started?


How to change the Class Prefix in Xcode 4?

You come at a certain point in the development of every app that what you see in the simulator does not match what you think should happen. Mostly these are human errors -- or at least they are in most of *my* cases ;-) -- but sometimes Xcode has just &#39;lost track&#39;, or so it seems. I&#39;ve learnt that the `Clean` (Shift+Cmd+K) and `Clean Build Folder…` (Option+Shift+Command+K) menu options can show the difference between your error or Xcode&#39;s. 

My question though is:

&gt;What does the `Clean` command do or not do, which leaves a reason for `Clean Build Folder…` to exist? When should I pick one over the other, why not just always clean the whole folder?

Xcode 4 &quot;Clean&quot; vs. &quot;Clean Build Folder&quot;

Hi I have read several questions on SO about applicationWillTerminate getting called and not getting called.

I wanted to summarize what I understood as there are several posts that speak differently.

1. For IOS (without multitasking) it is called always when home button is pressed.

2. For IOS 4 and above

   a. it is **not** called when pressing home button (as the app moves to background)

   b. it is called when closing the app from the multi tasking dock and if the app has a sudden terminate flag in info.plist disabled else it is not called. **( I set the &quot;Application should get App Died events&quot; and even then on closing the app from the multitasking dock the terminate function did not get called)**


Based on that I had a couple of questions

Is it a good practise to set the Application should get App Died events flag? ( I set the &quot;Application should get App Died events&quot; and even then on closing the app from the multitasking dock the terminate function did not get called)

or

Is registering for &quot;UIApplicationWillTerminateNotification&quot; a better thing to do than the info.plist setting?

Basically I need to do some work only when the app terminates and NOT when it moves to background.

or

EDIT (1): 
When the app is terminated the following is sent to the APP. How do I catch it?

Program received signal:  “SIGKILL”.


**EDIT (2):**


Please note : It is not getting called in IOS 4 and above when removing from the multitasking dock. You might think it is. But in my case it is not.

I am asking if anyone knows why? Is there something else I am missing. 

Also Note I set the &quot;Application should get App Died events&quot; and even then it is not getting called.

**EDIT (3):**

The answer for the following question also did not work.
https://stackoverflow.com/questions/4320557/applicationwillterminate-does-not-get-invoked


Anybody facing the similar issue as me?

applicationWillTerminate when is it called and when not

I want to check if the user is running the app on iOS less than 5.0 and display a label in the app.

How do I detect which iOS is running on user&#39;s device programmatically?

Thanks!

How can we programmatically detect which iOS version is device running on?

I read SO about another user encountering similar [error][1], but this error is in different case.

I received this message when I added a View Controller initially:

    Unbalanced calls to begin/end appearance transitions for 
    &lt;UITabBarController: 0x197870&gt;

The structure of the app is as follow:

I got a 5-tab TabBarController linked to 5 View Controllers. In the initial showing tab, I call out a new View Controller to overlay as an introduction of the app.

I use this code to call the introduction view controller:

    IntroVC *vc = [[IntroVC alloc] init];
    [self presentModalViewController:vc animated:YES];
    [vc release]; 

After this `IntroVC` view controller shows up, the above error shows. 

p.s. I am using xCode 4.2 &amp; iOS 5.0 SDK, developing iOS 4.3 app.


  [1]: https://stackoverflow.com/questions/6809593/unbalanced-calls-to-begin-end-appearance-transitions-for-firstviewcontroller-0

Unbalanced calls to begin/end appearance transitions for &lt;UITabBarController: 0x197870&gt;

I am developing an iPhone application that needs to play videos. 
So far, I learned that there are at least two API&#39;s for achieving this; `AVPlayer` and `MPMoviePlayerController`.

What are the main differences?



AVPlayer and MPMoviePlayerController differences

I&#39;m currently working on an app that uses the &quot;ChalkboardSE-Regular&quot; font and my deployment target is 4.0+.  This font was not available in 4.1 but it is supported in 4.3.  What would be the best way to go about checking if the font exists and if it does not, use another supported font on the &lt;4.1 versions of iOS. [UIFont familyName] returns a list of these fonts &quot;Chalkboard SE&quot;

Thanks in advance!

T

Content Type	Original Author	Original Content on Stackoverflow
Question	Alpinista	View Question on Stackoverflow
Solution 1 - Ios	RyanG	View Answer on Stackoverflow
Solution 2 - Ios	user263865	View Answer on Stackoverflow
Solution 3 - Ios	Joel B	View Answer on Stackoverflow

How do you enable ARC project-wide in Xcode 4.2

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What does style.display = '' actually do?

Disable point-of-interest information window using Google Maps API v3

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