`UICollectionView` has the properties `alwaysBounceHorizontal` and `alwaysBounceVertical`. Setting the horizontal to YES `did` the trick. 



Thanks for @VaporwareWolf ,the answer is correct. I want to add a supplement that:  
&gt;DO NOT forget setting the `bounces` property to `YES` at the same time（through storyboard or your code）.

Is there a way to expand all elements in the elements view of the Chrome WebKit inspector?

How do you expand all elements in the WebKit Inspector elements view?

I have the following code in my sql function:

    if @max_chi &gt; -999
    begin
        INSERT INTO CH_TABLE(X1, X2, VALUE)
        VALUES(cur_out.sessionnumber, maxpos, max_chi)
        
        commit
    end

The following is a SQL Server 2008 Query and it gives me an error:

&gt;Invalid use of a side-effecting operator &#39;INSERT&#39; within a function.

Why am I not allowed to do this? What can I do to fix this?

Invalid use side-effecting operator Insert within a function

I have a UICollectionView with a custom UICollectionViewFlowLayout. It scrolls horizontally and only shows one item at a time (full height). I have pagingEnabled = YES so that it sticks to pages. 

The UICollectionView shows photos within a particular day. I initially had buttons to change the day +/- 1 day, but I thought it would be neat if the user could pull on the collection view past the first or last image (past a predetermined threshold) to change the day. I implemented this using the UIScrollView delegate methods and it works great...... if there are 2 or more items in the collection view. 

This is hard to describe, but if there is only 1 item, it doesn&#39;t allow me to pull the item past it&#39;s bounds. I.E. there is no bounce to it. 

I&#39;d like to have this behavior, but I need to overcome this problem first. I&#39;m thinking that if I removed pagingEnabled = YES and used targetContentOffsetForProposedContentOffset:proposedContentOffset:withScrollingVelocity, that I may be able to get it to work but I really enjoy the snappy behavior that paging enables. (They are mutually exclusive). 

Any ideas on this?

UICollectionView doesn&#39;t bounce when datasource has only 1 item

I have a UICollectionView with a custom UICollectionViewFlowLayout. It scrolls horizontally and only shows one item at a time (full height). I have pagingEnabled = YES so that it sticks to pages.
The UICollectionView shows photos within a particular day. I initially had buttons to change the day +/- 1 day, but I thought it would be neat if the user could pull on the collection view past the first or last image (past a predetermined threshold) to change the day. I implemented this using the UIScrollView delegate methods and it works great...... if there are 2 or more items in the collection view.
This is hard to describe, but if there is only 1 item, it doesn't allow me to pull the item past it's bounds. I.E. there is no bounce to it.
I'd like to have this behavior, but I need to overcome this problem first. I'm thinking that if I removed pagingEnabled = YES and used targetContentOffsetForProposedContentOffset:proposedContentOffset:withScrollingVelocity, that I may be able to get it to work but I really enjoy the snappy behavior that paging enables. (They are mutually exclusive).
Any ideas on this?

I&#39;m having a serious problem that I just can&#39;t seem to fix and it&#39;s driving me insane for the last two days.  I have searched far and wide and I can&#39;t find a solution, even though I have tried many.

I have a `UITextView` inside a `UIScrollView`. I am able to dynamically resize the `UITextView` inside the scrollview to display the text.  But when the `UITextView` contains very large text it gets cut off when I scroll almost to the end.  However, the `UIScrollView`&#39;s frame is still being sized correctly.

I read these posts: [this][1] [this][2] and many similar ones.


The `UIScrollview` and `UITextview` are both created in the xib using AutoLayout.

Here is my current code and a screenshot as you can see the blank spot in the screenshot should be filled with text.  please help. 

![enter image description here][3]

    - (void)viewDidAppear:(BOOL)animated
    {
        CGRect frame = self.longDescField.frame;
        frame.size.height = self.longDescField.contentSize.height;
        self.longDescField.frame = frame;
    
        self.scrollView.contentSize = CGSizeMake(self.view.frame.size.width,  self.longDescField.contentSize.height + 200);
        self.scrollView.scrollEnabled = YES;
        [self.scrollView flashScrollIndicators];
    }


  [1]: https://stackoverflow.com/questions/16836707/uitextview-text-cut-off-when-there-is-a-large-amount-of-text
  [2]: https://stackoverflow.com/questions/7823229/uitext-content-size-in-ui-scroll-view-the-text-in-bottom-is-cut-off
  [3]: http://i.stack.imgur.com/f5M5l.png

Large Text Being Cut Off in UITextView That is Inside UIScrollView

I submitted an app update, but I have received an email telling me this error has occurred:

&gt; Missing recommended icon file - The bundle does not contain an app icon for iPhone / iPod Touch of exactly &#39;120x120&#39; pixels, in .png format

How can I fix this problem?

[Here][1] are the current icon requirements from Apple.

I could not see 120x120 appearing anywhere? Is this iOS 7 specific? Should I include an icon named `Icon-120.png` or something?

Update: I added three icons to the resource folder (Icon-120.png : 120x120, Icon-76.png: 76x76 &amp; Icon-152.png: 152x152), but it did not add them to the `info.plist`. The same warning email was received. I decided to not change anything and wait to see what would happen next.

To my utter amazement, the app went into the review stage 20 hours later and was released on the market the very next day! Kind of makes me wonder how many Apple/Windows app review people lurk around here.

  [1]: https://developer.apple.com/library/ios/qa/qa1686/_index.html

&#39;Missing recommended icon file - The bundle does not contain an app icon for iPhone / iPod Touch of exactly &#39;120x120&#39; pixels, in .png format&#39;

Please correct me if I&#39;m wrong.

I&#39;m new to mobile development and I would like to develop an app to submit to the apple store.

But I am heavily discouraged by the prices of the macs that I am developing the app in mind.

Let&#39;s say I know exactly what I want and how to code it.

If I was to create a developers account and pay the fee - then borrow my friends mac, write the code and submit my code to apple. Is that all I need the mac for?  And then I&#39;ll be able to access all the stats etc through iTunes on my windows computer?

Can someone please tell me I&#39;m delusional?

Build an iOS app without owning a mac?

UITableView draws with ragged lines on iOS 7:

![enter image description here][1]

How to fix it? The line between cells should be on the full width of the screen.

  [1]: http://i.stack.imgur.com/OE69H.png 

How to fix UITableView separator on iOS 7?

Earlier, I was using iOS 6.1 for my project. Recently I have switched to iOS 7. For, a lot of changes I knew, I updated my code.. But I have observed a strange behavior. My view on every screen gets hidden below navigation bar. Repositioning view solves the problem for iOS7, but creates problems for older iOS versions.

Can anyone explain me, what is the reason and why does it happen?? What has been changed in iOS 7 that&#39;s causing this problem??

Any help would be appreciated.. 

View got hidden below UINavigationBar iOS 7

I&#39;m trying to configure a UIPageViewController SPECIFICALLY from storyboard:

![enter image description here][1]

`TutorialPageViewController.h`

    #import &lt;UIKit/UIKit.h&gt;
    @interface TutorialPageViewController : UIPageViewController &lt;UIPageViewControllerDelegate, UIPageViewControllerDataSource&gt;
    @end

`TutorialPageViewController.m`

    #import &quot;TutorialPageViewController.h&quot;
    
    @interface TutorialPageViewController ()
    @property (assign, nonatomic) NSInteger index;
    @end
    
    @implementation TutorialPageViewController
    {
        NSArray *myViewControllers;
    }
    
    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) {
            // Custom initialization
        }
        return self;
    }
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
    	// Do any additional setup after loading the view.
        self.delegate = self;
        self.dataSource = self;
        [self didMoveToParentViewController:self];
        UIStoryboard *tutorialStoryboard = [UIStoryboard storyboardWithName:@&quot;TutorialStoryboard&quot; bundle:[NSBundle mainBundle]];
        UIViewController *tuto1 = [tutorialStoryboard instantiateViewControllerWithIdentifier:@&quot;TutorialPageViewController_1&quot;];
        UIViewController *tuto2 = [tutorialStoryboard instantiateViewControllerWithIdentifier:@&quot;TutorialPageViewController_2&quot;];
        
        myViewControllers = @[tuto1, tuto2, tuto1, tuto2];
        self.index = 0;
        
        [self setViewControllers:@[tuto1] direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
    }
    
    - (UIViewController *)viewControllerAtIndex:(NSUInteger)index {
        return myViewControllers[index];
    }
    
    - (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController {
        
        NSUInteger index = self.index;
        
        if (index == 0) { return nil; }
        
        // Decrease the index by 1 to return
        index--;
        return [self viewControllerAtIndex:index];
    }
    
    - (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController {
        
        NSUInteger index = self.index;
        index++;
        if (index &gt; [myViewControllers count]) { return nil; }
        
        return [self viewControllerAtIndex:index];
    }
    
    - (NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController {
        // The number of items reflected in the page indicator.
        return [myViewControllers count];
    }
    
    - (NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController {
        // The selected item reflected in the page indicator.
        return 0;
    }
    
    @end


Problem is...
-------------

 - The first page displays well with the page indicator. While swiping,
 - I can see properly the second page.
 - **As soon as the transition finishes, I get a black screen (with the page indicator properly displaying page number 2). No user
   interaction is available anymore.**

  [1]: http://i.stack.imgur.com/pjrzc.png

UIPageViewController and storyboard

Is there a way to have a single ContainerView with multiple embed segues? The aim is for a ContainerView to hold a few different ViewControllers depending on what buttons have been pressed; only one is going to be visible at a time. I want to use embed segues so that in Interface Builder the storyboards are automatically shown at the same size as the ContainerView.

I realise that I can manually resize the other ViewControllers in InterfaceBuilder, but I want the automatic sizing provided by the embed segue. If another way of doing that is available, that would be fine too. Not having the views load on viewDidLoad is fine - as mentioned earlier, the shown ViewController can change depending on the buttons pressed.



ContainerView with multiple embed segues

Xcode 5 has a preferences pane that allow one to download iPhone 6.1 simulator, however I can&#39;t find a place where it allows downloading of iOS 6 SDK, thus it is not possible to set the active SDK to iOS 6 when developing with Xcode 5. Is there a workaround that would allow Xcode 5 to install iOS 6 SDK?

**EDIT:**

Workarounds should no longer be necessary now that Xcode 5 is generally available and allows you to download previous versions of the SDK. 

![enter image description here][1]


  [1]: http://i.stack.imgur.com/Ihgmd.png

Is it possible to install iOS 6 SDK on Xcode 5?

I need to search some strings and set some attributes prior to merging the strings, so having NSStrings -&gt; Concatenate them -&gt; Make NSAttributedString is not an option, is there any way to concatenate attributedString to another attributedString?

How can I concatenate NSAttributedStrings?

When launching an app from a URL, there is a distinction between whether the URL is freshly launching an app, or if it&#39;s resuming an app that has been put into a suspended state.

My question is, how do I debug the process of a &quot;fresh launch&quot; *from* a URL? Hitting &quot;Run&quot; in Xcode automatically opens the app. Then, I have to suspend the app to reach Safari and access my test site. But if I close my suspended app, Xcode is no longer attached to it and I&#39;m unable to debug.

iOS: How to debug &quot;freshly launching&quot; an app from a URL

I am using `UICollectionView` first time in my iPad application.
I have set `UICollectionView` such that its size and cell size is same, means only once cell is displayed at a time.

**Problem:**
Now when user scroll `UICollectionView` I need to know which cell is visible I have to update other UI elements on change. I didn&#39;t find any delegate method for this. How can I achieve this?


**Code:**
    
    [self.mainImageCollection setTag:MAIN_IMAGE_COLLECTION_VIEW];
    [self.mainImageCollection registerClass:[InspirationMainImageCollectionCell class] forCellWithReuseIdentifier:@&quot;cellIdentifier&quot;];
    [self.mainImageFlowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
    [self.mainImageFlowLayout setMinimumInteritemSpacing:0.0f];
    [self.mainImageFlowLayout setMinimumLineSpacing:0.0f];
    self.mainImageFlowLayout.minimumLineSpacing = 0;
    [self.mainImageCollection setPagingEnabled:YES];
    [self.mainImageCollection setShowsHorizontalScrollIndicator:NO];
    [self.mainImageCollection setCollectionViewLayout:self.mainImageFlowLayout];


**What I have tried:**

As `UICollectionView` conforms to `UIScrollView`, I got when user scroll ends with `UIScrollViewDelegate` method

    -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

But inside above function how can I get current visible cell index of `UICollectionView` ?




UICollectionView current visible cell index

I&#39;ve been updating my apps to run on iOS 7 which is going smoothly for the most part. I have noticed in more than one app that the `reloadData` method of a `UICollectionViewController` isn&#39;t acting quite how it used to. 

I&#39;ll load the `UICollectionViewController`, populate the `UICollectionView` with some data as normal. This works great on the first time. However if I request new data (populate the `UICollectionViewDataSource`), and then call `reloadData`, it will query the data source for `numberOfItemsInSection` and `numberOfSectionsInCollectionView`, but it doesn&#39;t seem to call `cellForItemAtIndexPath` the proper number of times. 

If I change the code to only reload one section, then it will function properly. This is no problem for me to change these, but I don&#39;t think I should have to. `reloadData` should reload all visible cells according to the documentation. 

Has anyone else seen this?

UICollectionView reloadData not functioning properly in iOS 7

I was wondering how to add a long press gesture recognizer to a (subclass of) UICollectionView. I read in the documentation that it is added by default, but I can&#39;t figure out how. 

What I want to do is: 
Long press on a cell ( [I have a calendar thingy from github][1] ), get which cell is tapped and then do stuff with it. I need to know what cell is longpressed. Sorry for this broad question, but i couldn&#39;t find anything better on either google or SO 


  [1]: https://github.com/min/MNCalendarView

Long press gesture on UICollectionViewCell

Does anyone know why contentSize is not updated immediately after reloadData is called on UICollectionView?

If you need to know the contentSize the best work around I&#39;ve found is the following:

    [_collectionView reloadData];
    
    double delayInSeconds = 0.0001;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
    dispatch_after(DISPATCH_TIME_NOW, dispatch_get_main_queue(), ^(void)
        {
            // TODO: Whatever it is you want to do now that you know the contentSize.
        });

Obviously this is a fairly brittle hack that makes assumptions on Apple&#39;s implementation but so far it has proven to work quite reliably.

Does anyone have any other workarounds or knowledge on why this happens? I&#39;m debating submitting a radar because this I can&#39;t understand why they cannot calculate the contentSize in the same run loop. That is how UITableView has worked for its entire implementation.

EDIT: This question use to reference the setContentOffset method inside the block because I want to scroll the collection view in my app. I&#39;ve removed the method call because peoples&#39; answers focused on why wasn&#39;t I using scrollToItemAtIndexPath inside of why contentSize is not being updated.

contentSize is not updated after reloadData is called on UICollectionView

How can i find `indexPath` for `cell` in the middle of `UICollectionView`?

I have horizontal scrolling and only one  big `cell` is visible (partially two other `cell`s on the sides are visible as well).
I need to delete `cell` located in the center (means  - current `cell`) without touching it.

Only pressing &quot;Trash&quot; button and confirm Delete. But now it delete only first `cell`s.


    - (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {
        if (buttonIndex == actionSheet.destructiveButtonIndex) { 
            initialPinchPoint = ????????
        
            self.tappedCellPath = [self.collectionView indexPathForItemAtPoint:initialPinchPoint];

            Technique *technique = [arrayOfTechnique objectAtIndex:self.tappedCellPath.row];
            
            [self deleteData:[NSString stringWithFormat:@&quot;DELETE FROM TECHNIQUES WHERE TECHNIQUENAME IS &#39;%s&#39;&quot;,[technique.techniquename UTF8String]]];
            
            [arrayOfTechnique removeObjectAtIndex:self.tappedCellPath.row];

            //[arrayOfTechnique removeObjectAtIndex:[custom_layout ]];
            [self removeImage:technique.techniquename];
            
            [self.collectionView performBatchUpdates:^{
                [self.collectionView deleteItemsAtIndexPaths:[NSArrayarrayWithObject:self.tappedCellPath]];
             } completion:nil];
        
             [self checkArrayCount];
        }
    }


how to get indexPath for cell which is located in the center of UICollectionView

I have a `UIScrollView` that lays out a grid of icons.  If you were to imagine the layout for the iOS Springboard, you&#39;d be pretty close to correct.  It has a horizontal, paged scroll (just like Springboard).  However, it appears that the layout is not quite right.  It appears as though it is laying out the items from top to bottom.  As a result, my last column only has 2 rows in it, due to the number of items to be displayed.  I&#39;d rather have my last row on the last page have 2 items, like you would see in the Springboard.

How can this be accomplished with `UICollectionView` and its related classes?  Do I have to write a custom `UICollectionViewFlowLayout`?

UICollectionView - Horizontal scroll, horizontal layout?

I keep getting &#39;Unable to simultaneously satisfy constraints&#39; exceptions (Xcode 5, iOS 7, both device and simulator), where one of the constraints in the list is something like this:

    &quot;&lt;NSLayoutConstraint:0x165b23d0 &#39;UIView-Encapsulated-Layout-Width&#39;
    H:[StoryPlayerCell:0x165affc0(0)]&gt;&quot;

I did not set this constraint myself. It&#39;s also not an `NSAutoresizingMaskLayoutConstraint`.
But where does it come from? And how can I get rid of it?

I have no idea.
And I can&#39;t find anything about `&#39;UIView-Encapsulated-Layout-Width&#39;` in the Apple&#39;s documentation.
Even the Google search returns nothing at all.

Any suggestions?

PS: I&#39;m using this cell in a `UICollectionView` with a custom subclass of `UICollectionViewFlowLayout`. Maybe the `&#39;Encapsulated-Layout&#39;` part has something to do with this?

What is a &#39;UIView-Encapsulated-Layout-Width&#39; constraint?

I am using a UICollectionView in my project, where there are multiple cells of differing widths on a line. According to:
https://developer.apple.com/library/content/documentation/WindowsViews/Conceptual/CollectionViewPGforIOS/UsingtheFlowLayout/UsingtheFlowLayout.html

it spreads the cells out across the line with equal padding. This happens as expected, except I want to left justify them, and hard code a padding width.

I figure I need to subclass UICollectionViewFlowLayout, however after reading some of the tutorials etc online I just don&#39;t seem to get how this works.


Left Align Cells in UICollectionView

I have `UICollectionView` with horizontal scrolling and there are always 2 cells side-by-side per the entire screen. I need the scrolling to stop at the begining of a cell. With paging enabled, the collection view scrolls the whole page, which is 2 cells at once, and then it stops.

I need to enable scrolling by a single cell, or scrolling by multiple cells with stopping at the edge of the cell.

I tried to subclass `UICollectionViewFlowLayout` and to implement the method `targetContentOffsetForProposedContentOffset`, but so far I was only able to break my collection view and it stopped scrolling. Is there any easier way to achieve this and how, or do I really need to implement all methods of `UICollectionViewFlowLayout ` subclass? Thanks.

Paging UICollectionView by cells, not screen

![enter image description here][1]


1) How can i achieve as shown in image with `UICollectionView`?

2) I&#39;ve tried `-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath` method &amp; passed different sizes but it leaves out spaces between cells. Can i empty those spaces? I want different height &amp; width for every cell

**Current output:** 
![enter image description here][2].

  [1]: http://i.stack.imgur.com/QnRtn.png
  [2]: http://i.stack.imgur.com/FCeEq.jpg

Content Type	Original Author	Original Content on Stackoverflow
Question	VaporwareWolf	View Question on Stackoverflow
Solution 1 - Iphone	VaporwareWolf	View Answer on Stackoverflow
Solution 2 - Iphone	guozqzzu	View Answer on Stackoverflow

UICollectionView doesn't bounce when datasource has only 1 item

Iphone Problem Overview

Iphone Solutions

Solution 1 - Iphone

Solution 2 - Iphone

Invalid use side-effecting operator Insert within a function

How do you expand all elements in the WebKit Inspector elements view?

Attributions