Start the &quot;Settings.app&quot;, go to General &gt; Reset &gt; Reset Location &amp; Privacy.

This resets the privacy settings for all apps, but as far as I know, there is no way to reset it for a single app. Even removing the app and installing it again does not help.

I am trying to get the first 10 characters of a string and want to replace space with `&#39;_&#39;`.

I have

      $text = substr($text, 0, 10);
      $text = strtolower($text);

But I am not sure what to do next.

I want the string

&gt;    this is the test for string.

become

&gt;    this_is_th


How do I replace part of a string in PHP?

How to resolve tree conflict in current scenerio.

    C:\DevBranch
    C:\MyBranch

I updated both branches. Edited MyBranch and then committed back. Now want to merge those changes into DevBranch. When I am doing the merge I am getting &#39;Tree Conflicts&#39;

    The last merge operation tried to add the file &#39;abc.def&#39;, but it was already added locally.

    How do you want to resolve this conflict?
    Keep the file from repository
    Keep the local file

How can I resolve?

Resolving tree conflict

In order to test access granting to the iOS calendar, I need to reset the privacy settings on my test device. 

However, every time I install it on the device it remembers the old privacy settings and does not show the alert view to ask me if I grant access. Deleting the app and reinstalling it does not change this fact. 

Is there a way to make iOS forget it knows my app and ask me again?

Is it possible to reset the privacy settings in iOS?

In order to test access granting to the iOS calendar, I need to reset the privacy settings on my test device.
However, every time I install it on the device it remembers the old privacy settings and does not show the alert view to ask me if I grant access. Deleting the app and reinstalling it does not change this fact.
Is there a way to make iOS forget it knows my app and ask me again?

With the release of iOS6 Apple wants us to use didUpdateLocations instead of didUpdateToLocation. Can anyone explain how to properly use didUpdateLocations?

didUpdateLocations instead of didUpdateToLocation

I have used this method,


        
    NSDictionary *jsonObject=[NSJSONSerialization 
           JSONObjectWithData:jsonData 
                      options:NSJSONReadingMutableLeaves 
                        error:nil];
    NSLog(@&quot;jsonObject is %@&quot;,jsonObject);

It&#39;s printing &quot;jsonObject is null&quot;.  
Is there any problem with &quot;error:nil&quot;.  
I am not using any url or connection methods.  
I have a json file and I want to display it in a table.

How to convert JSON serialized data to NSDictionary

Using XCode 4.5 and iOS 6, I&#39;m developing an app with a simple table view with custom cells.  I&#39;ve done this a hundred times in iOS 5 and below, but for some reason the new autoLayout system is giving me a lot of trouble.

I setup my table view and prototype cell in IB, added subviews and wired them up as IBOutlets then setup my delegate and dataSource.  However now whenever the first cell is fetched from `cellForRowAtIndexPath`, I get the following error:


&gt; \*\*\* Assertion failure in -[ShopCell layoutSublayersOfLayer:], /SourceCache/UIKit_Sim/UIKit-2372/UIView.m:5776
&gt;
&gt; \*\*\* Terminating app due to uncaught exception &#39;NSInternalInconsistencyException&#39;, reason: &#39;Auto Layout still required after executing -layoutSubviews. ShopCell&#39;s implementation of -layoutSubviews needs to call super.&#39;

I haven&#39;t implemented a -layoutSubviews method in my subclassed cell (ShopCell), and even when I try to do that and add the super call as it suggests I still get the same error. If I remove the subviews from the cell in IB, and change it to a standard UITableViewCell, everything works as expected, though of course I&#39;m left with no data in my cells.

I&#39;m almost certain that there&#39;s something simple I&#39;m missing, but can&#39;t find any documentation or guides to suggest what I&#39;ve done wrong.  Any help would be appreciated.

**Edit:** Just tried changing it to a UITableViewCell in IB and leaving all the subviews in place, still the same error.

&quot;Auto Layout still required after executing -layoutSubviews&quot; with UITableViewCell subclass

I&#39;m updating an old app with an `AdBannerView` and when there is no ad, it slides off screen. When there is an ad it slides on the screen. Basic stuff.

Old style, I set the frame in an animation block.
New style, I have a `IBOutlet` to the auto-layout constraint which determines the `Y` position, in this case it&#39;s distance from the bottom of the superview, and modify the constant:

    - (void)moveBannerOffScreen {
        [UIView animateWithDuration:5 animations:^{
            _addBannerDistanceFromBottomConstraint.constant = -32;
        }];
        bannerIsVisible = FALSE;
    }

    - (void)moveBannerOnScreen {
        [UIView animateWithDuration:5 animations:^{
            _addBannerDistanceFromBottomConstraint.constant = 0;
        }];
        bannerIsVisible = TRUE;
    }

And the banner moves, exactly as expected, but *no* animation.


----------


**UPDATE:** I re-watched [WWDC 12 talk Best Practices for Mastering Auto Layout][wwdc12] which covers animation. It discusses how to update constraints using **CoreAnimation**: 

![][slide1]
![][slide2]

I&#39;ve tried with the following code, but get the exact same results:

    - (void)moveBannerOffScreen {
        _addBannerDistanceFromBottomConstraint.constant = -32;
        [UIView animateWithDuration:2 animations:^{
            [self.view setNeedsLayout];
        }];
        bannerIsVisible = FALSE;
    }

    - (void)moveBannerOnScreen {
        _addBannerDistanceFromBottomConstraint.constant = 0;
        [UIView animateWithDuration:2 animations:^{
            [self.view setNeedsLayout];
        }];
        bannerIsVisible = TRUE;
    }

On a side note, I have checked numerous times and this is being executed on the *main* thread. 

[wwdc12]: https://developer.apple.com/videos/play/wwdc2012/228/
[slide1]: http://i.stack.imgur.com/576mp.png
[slide2]: http://i.stack.imgur.com/lr9mQ.png

How do I animate constraint changes?

I have an iPhone app that uses a `UINavigationController` to present a drill-down interface: First one view, then another, up to four levels deep. I want the first three views restricted to portrait orientation and only the last view should be allowed to rotate to landscape. When returning from the fourth view to the third and the fourth view was in landscape orientation I want everything to rotate back to portrait.

In iOS 5 I simply defined `shouldAutorotateToInterfaceOrientation:` in each of my view controllers to return YES for the allowable orientations. Everything worked as described above, including the return to portrait even if the device was being held in landscape orientation when returning from view controller #4 to #3.

In iOS 6 all view controllers rotate to landscape, breaking those that weren&#39;t meant to. The iOS 6 release notes say 

&gt; More responsibility is moving to the app and the app delegate. Now, iOS containers (such as `UINavigationController`) do not consult their children to determine whether they should autorotate. [...] The system asks the top-most full-screen view controller (typically the root view controller) for its supported interface orientations whenever the device rotates or whenever a view controller is presented with the full-screen modal presentation style. Moreover, the supported orientations are retrieved only if this view controller returns YES from its `shouldAutorotate` method. [...] The system determines whether an orientation is supported by intersecting the value returned by the app’s `supportedInterfaceOrientationsForWindow:` method with the value returned by the `supportedInterfaceOrientations` method of the top-most full-screen controller.

So I subclassed `UINavigationController`, gave my `MainNavigationController` a boolean property `landscapeOK` and used this to return the allowable orientations in `supportedInterfaceOrientations`. Then in each of my view controllers&#39; `viewWillAppear:` methods I have a line like this

        [(MainNavigationController*)[self navigationController] setLandscapeOK:YES];

to tell my `MainNavigationController` the desired behavior.

**Here comes the question:** If I now navigate to my fourth view in portrait mode and turn the phone over it rotates to landscape. Now I press the back button to return to my third view which is supposed to work portrait only. But it doesn&#39;t rotate back. How do I make it do that?

I tried

        [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait]

in the `viewWillAppear` method of my third view controller, but it doesn&#39;t do anything. Is this the wrong method to call or maybe the wrong place to call it or should I be implementing the whole thing in a totally different way?

 

iOS 6: How do I restrict some views to portrait and allow others to rotate?

I m getting this error on performing `insertItemsAtIndexPaths` in `UICollectionView`

Assertion failure in: 

    -[UICollectionViewData indexPathForItemAtGlobalIndex:], 
    /SourceCache/UIKit/UIKit-2372/UICollectionViewData.m:442
    2012-09-26 18:12:34.432  
    *** Terminating app due to uncaught exception &#39;NSInternalInconsistencyException&#39;, 
    reason: &#39;request for index path for global index 805306367 
    when there are only 1 items in the collection view&#39;

I have checked and my datasource contains only one element.
Any insights on why this could happen? If more information is needed I can definitely provide that.


UICollectionView Assertion failure

Ever since starting to work on iOS apps and objective C I&#39;ve been really puzzled by the different locations where one could be declaring and defining variables. On one hand we have the traditional C approach, on the other we have the new ObjectiveC directives that add OO on top of that. Could you folks helps me understand the best practice and situations where I&#39;d want to use these locations for my variables and perhaps correct my present understanding?

Here&#39;s a sample class (.h and .m):

    #import &lt;Foundation/Foundation.h&gt;

    // 1) What do I declare here?
    
    @interface SampleClass : NSObject
    {
        // 2) ivar declarations
        // Pretty much never used?
    }
    
    // 3) class-specific method / property declarations
    
    @end

and

    #import &quot;SampleClass.h&quot;
    
    // 4) what goes here?
    
    @interface SampleClass()
    
    // 5) private interface, can define private methods and properties here
    
    @end
    
    @implementation SampleClass
    {
        // 6) define ivars
    }
    
    // 7) define methods and synthesize properties from both public and private
    //    interfaces
    
    @end

 - My understanding of 1 and 4 is that those are C-style file-based declarations and definitions that have no understanding whatsoever of the concept of class, and thus have to be used exactly how they would be used in C. I&#39;ve seen them used for implementing static variable-based singletons before. Are there other convenient uses I&#39;m missing?
 - My take from working with iOS is that ivars have been alost completely phased out outside of the @synthesize directive and thus can be mostly ignored. Is that the case?
 - Regarding 5: why would I ever want to declare methods in private interfaces? My private class methods seem to compile just fine without a declaration in the interface. Is it mostly for readability?

Thanks a bunch, folks!



Declaration/definition of variables locations in ObjectiveC?

I have installed the AdMob SDK 6.2.0 (Xcode 4.5 (4G182) and I am testing on an iPhone 4S and the simulator). I followed the tutorial and just want to get AdMob showing a banner once. But it crashes on the last line:

    self.bannerView = [[GADBannerView alloc]
                   initWithFrame:CGRectMake(0.0,
                                            self.view.frame.size.height -
                                            GAD_SIZE_320x50.height,
                                            GAD_SIZE_320x50.width,
                                            GAD_SIZE_320x50.height)];
    
    self.bannerView.delegate = self;
    self.bannerView.adUnitID = @&quot;xREMOVEDBYMEx&quot;;
    self.bannerView.rootViewController = self;
    [self.view addSubview:self.bannerView];
    GADRequest * request = [GADRequest request];
    request.testing = YES;
    [self.bannerView loadRequest:request];


The crash is

&gt; 2012-09-28 09:03:58.268 NewProject[1467:c07] -[GADObjectPrivate changeState:]: unrecognized selector sent to instance 0x95c17d0
2012-09-28 09:03:58.276 NewProject[1467:c07] *** Terminating app due to uncaught exception &#39;NSInvalidArgumentException&#39;, reason: &#39;-[GADObjectPrivate changeState:]: unrecognized selector sent to instance 0x95c17d0&#39;

This looks like a bug in the library to me but I think thats very unlikely. Any thoughts?

EDIT: The exact same code works in the example projects. Is there something I can do wrong with my project file that would result in that error?

AdMob crashes with [GADObjectPrivate changeState:]: unrecognized selector

I gave an app with say 10 view controllers. I use navigation controller to load/unload them. 

All but one are in portrait mode. Suppose the 7th VC is in landscape. I need it to be presented in landscape when it gets loaded. 

**Please suggest a way to force the orientation go from portrait to landscape in IOS 6** (and it will be good to work in IOS 5 as well).

Here is how I was doing it **BEFORE** IOS 6:

    - (void)viewWillAppear:(BOOL)animated {
        [super viewWillAppear:animated];
        UIViewController *c = [[[UIViewController alloc]init] autorelease];
        [self presentModalViewController:c animated:NO];
        [self dismissModalViewControllerAnimated:NO];
    }
    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{
        return (interfaceOrientation == UIInterfaceOrientationPortrait);
    }

Presenting and dismissing a modal VC was forcing the app to review its orientation, so `shouldAutorotateToInterfaceOrientation` was getting called.

**What I have have tried in IOS 6:**

    - (BOOL)shouldAutorotate{
        return YES;
    }
    -(NSUInteger)supportedInterfaceOrientations{
        return UIInterfaceOrientationMaskLandscape;
    }
    - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
        return UIInterfaceOrientationLandscapeLeft;
    }

On load, the controller keeps staying in portrait. After rotating the device, the orientation changes just ok. But I need to make the controller to rotate automatically to landscape on load, thus the user will have to rotate the device to see the data correctly.

Another problem: after rotating the device back to portrait, the orientation goes to portrait, although I have specified in `supportedInterfaceOrientations` only `UIInterfaceOrientationMaskLandscape`. Why it happens?

Also, **NONE** of above 3 methods are getting called.

**Some (useful) data:**

 1. In my plist file I have specified 3 orientations - all but upside down.
 2. The project was started in Xcode 4.3 IOS 5. All classes including xibs were created before Xcode 4.5 IOS 6, now I use the last version.
 3. In plist file the status bar is set to visible.
 4. In xib file (the one I want to be in landscape) the status bar is &quot;None&quot;, the orientation is set to landscape.


Any help is appreciated. Thanks. 

Content Type	Original Author	Original Content on Stackoverflow
Question	david	View Question on Stackoverflow
Solution 1 - Ios	Martin R	View Answer on Stackoverflow

Is it possible to reset the privacy settings in iOS?

Ios Problem Overview

Ios Solutions

Solution 1 - Ios

Resolving tree conflict

How do I replace part of a string in PHP?

Attributions