I ran into the exact same problem this morning.  Here&#39;s how I fixed it.

1. Select your Target in the project navigator.  Under the *General* tab, you should see the section for **App Icons and Launch Images**.  Where you see Launch Images Source, click &#39;Use Asset Catalog&#39;.

2. You will then see **Migrate launch images to an asset catalog** dialogue.  Click &#39;Migrate&#39;.

3. Make sure that your **Launch Images Source** on the previous screen points to the right image set in your asset catalog.  In your case, you would set it to &#39;Default&#39;.

That should take care of the warning. Hope that helps!

In one of my project I&#39;m using an external image link to display a screenshot via the GitHub page, which automatically parses the README.rst

[GitHub page of ROyWeb][1]

I updated this screenshot on my web server several times in the last weeks and I just realised that it is not updated on the GitHub page since... well I think it never updated ;-)
GitHub somehow downloaded the image and loads it from it&#39;s cache servers.

Within the README.rst, there is clearly the correct link:

[Actual link to the ROyWeb screenshot][2]

Which you can confirm, when you load the raw file:

[raw README.txt on GitHub][3]

But when I check the URL of the displayed image on the GitHub page, I get:

[GitHub cached screenshot of ROyWeb][4]

Does anyone know how to force a &quot;recache&quot;?


  [1]: https://github.com/tamasgal/royweb
  [2]: http://tamasgal.com/km3net/ROyWeb_Screenshot.png
  [3]: https://raw.githubusercontent.com/tamasgal/royweb/master/README.rst
  [4]: https://camo.githubusercontent.com/ed2a9e403a80605c47e0eedf2c2473549b8d7e67/687474703a2f2f74616d617367616c2e636f6d2f6b6d336e65742f524f795765625f53637265656e73686f742e706e67

How to force image (cache) update in README.rst on GitHub


I want to enforce Unique constraint in a table &amp; I am using Entity Framework Code-First.

Is it possible to add a unique constraint using EF 6 as i believe in earlier versions it was not possible.

Is it possible to set a unique constraint using Entity Framework Code First?

I am using Xcode 6.1 to create a app supporting iOS 6 and later.

.In target&#39;s &quot;App Icons and Launch Images&quot;, I set the Launch Images Source as &quot;Use Asset Catalog&quot; and  Launch Screen File to &quot;LaunchScreen&quot;.

In Images.xcassets which created by Xcode, I fill in every box for &quot;LaunchImage&quot;, but there&#39;s always a warning message:

&gt; Retina 4-inch Support. Applications using Launch Screen Files and
&gt; targeting iOS 7.1 and earlier need to also include a Launch Image in
&gt; an Asset Catalog.

I created another Image Set named as &quot;Default&quot; and fill in the &quot;Retina 4 2x&quot; box with expected image. But the warning message still there. 

Any hint to clear this warning? Thanks.


  [1]: http://i.stack.imgur.com/al3Ns.png

Xcode 6.1 Warning about Launch Image in Asset Catalog

I am using Xcode 6.1 to create a app supporting iOS 6 and later.
.In target's "App Icons and Launch Images", I set the Launch Images Source as "Use Asset Catalog" and Launch Screen File to "LaunchScreen".
In Images.xcassets which created by Xcode, I fill in every box for "LaunchImage", but there's always a warning message:
> Retina 4-inch Support. Applications using Launch Screen Files and
> targeting iOS 7.1 and earlier need to also include a Launch Image in
> an Asset Catalog.
I created another Image Set named as "Default" and fill in the "Retina 4 2x" box with expected image. But the warning message still there.
Any hint to clear this warning? Thanks.

How can I add a **PDF file** for an app , where you click on a button to view the file &amp; when you&#39;re done you get back to screen you were at?

Open PDF file using swift

    
    // Doesn&#39;t work
    cell.selectionStyle = .Blue
    //Works when the selection is not multiple, if it&#39;s multiple with each selection the previous one disappear...
    let cellBGView = UIView()
    cellBGView.backgroundColor = UIColor(red: 0, green: 0, blue: 200, alpha: 0.4)
    cell.selectedBackgroundView = cellBGView


Any answer how to set background color of the cells which are selected?



UITableViewCell Selected Background Color on Multiple Selection

I am having some trouble getting a WKWebView in iOS 8 to display an alert dialog that is called from Javascript. After creating a standard WKWebView and loading an HTML file, I have a button on the page that creates a simple alert with some text. This works in UIWebView and in Google Chrome/Safari, but does not appear to be working in WKWebView. Any help is appreciated.

My setup is as follows:

    WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
    config.allowsInlineMediaPlayback = YES;
    config.mediaPlaybackRequiresUserAction = false;
    _wkViewWeb = [[WKWebView alloc] initWithFrame:_viewWeb.frame config];
    _wkViewWeb.scrollView.scrollEnabled = NO;
    NSString *fullURL = @&quot;file://.../TestSlide.html&quot;;
    NSURL *url = [NSURL URLWithString:fullURL];
    NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10];
	
    [_wkViewWeb loadRequest:request];

The html has the following function:

    &lt;SCRIPT Language=&quot;JavaScript&quot;&gt;
    function alertTest() {
        alert(&quot;Testing Alerts&quot;);
    }
    &lt;/SCRIPT&gt;

And a button:

    &lt;b&gt;Test Alerts: &lt;input type=&quot;button&quot; value=&quot;Alert Popup&quot; onclick=&quot;alertTest()&quot;&gt;&lt;br&gt;&lt;/b&gt; &lt;br&gt;

This setup works in UIWebView and in regular browsers, but does not work in WKWebView. Am I missing something in the configuration? Should I be using one of the WK delegates to control the alert/confirm dialog behavior? Thank you.

iOS WKWebView not showing javascript alert() dialog

I would like to globally ignore all `println()` calls in my Swift code if I am not in a Debug build. I can&#39;t find any robust step by step instructions for this and would appreciate guidance. is there a way to do this globally, or do I need to surround every `println()` with `#IF DEBUG/#ENDIF` statements?

Remove println() for release version iOS Swift

Need to generate `.ipa` file for Ad-Hoc distribution. Client has provided only certificates, private keys and provisioning profiles which were enough to create `.ipa` till Xcode 5. But in Xcode 6.1 when I export as `Save For Ad Hoc Deployment` it gives message

    To save for Ad Hoc Deployment, you need to add an Apple ID account that is enrolled in the iOS Developer Program for the development team &#39;xxxxxxxxxx&#39;
![enter image description here][1]
![enter image description here][2]

Is there any way of creating `.ipa` without developer account credentials?


  [1]: http://i.stack.imgur.com/gufV4.png
  [2]: http://i.stack.imgur.com/mq3LJ.png

How to create ipa in xcode 6 without Apple Developer account?

**Xcode code formatter Swift**

I&#39;m trying to auto format my code written in Swift. It&#39;s necessary if you&#39;re working in team and using CVS and don&#39;t want to merge for hours.


&lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;I&lt;/kbd&gt; just makes an indent, but for example i want to have proper space between functions and just all the stuff like in Clang.

How to use code formatter in Xcode for Swift?

What&#39;s the difference in the build phases between putting a framework in &quot;Link binary with libraries&quot; or in &quot;Embed frameworks&quot;?

Link Binary with libraries VS Embed Frameworks

I&#39;m trying to set UIImageView programmatically in Xcode 6.1:

    @IBOutlet weak var bgImage: UIImageView!
    
    var image : UIImage = UIImage(named:&quot;afternoon&quot;)!
    bgImage = UIImageView(image: image)
    bgImage.frame = CGRect(x: 0, y: 0, width: 100, height: 200)
    view.addSubview(bgImage)

But Xcode is saying &quot;expected declaration&quot; with `bgImage = UIImageView(image: image)`  Image `&quot;afternoon&quot;`is a PNG, and my understanding is PNG does not need an extension in XCode 6.1.

Also tried just `bgImage.image = UIImage(named: &quot;afternoon&quot;)`, but still get:

![enter image description here][1]

  [1]: https://i.stack.imgur.com/zslbH.jpg

**UPDATE**

OK, I have put the code to update `UIImageView` into the `viewDidLoad` function, but `UIImageView` is still not showing the image (which exists in the base directory as afternoon.png):

    @IBOutlet weak var bgImage: UIImageView!
    @IBOutlet weak var dateLabel: UILabel!
    @IBOutlet weak var timeLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        updateTime()
        var timer = NSTimer()
        let aSelector : Selector = &quot;updateTime&quot;
        timer = NSTimer.scheduledTimerWithTimeInterval(0.01, target: self, selector: aSelector, userInfo: nil, repeats: true)
        
        var image : UIImage = UIImage(named:&quot;afternoon&quot;)!
        bgImage = UIImageView(image: image)
    }



Programmatically set image to UIImageView with Xcode 6.1/Swift

I know default values of IBInspectable-properties can be set as:

`@IBInspectable var propertyName:propertyType = defaultValue` in Swift. But how do I achieve a similar effect in Objective-C so that I can have default value of some property set to something in Interface Builder?

How to set default values for IBInspectable in Objective-C?

I&#39;m working with a React Native app and I&#39;m trying to set a customize launch screen but I&#39;m not able to.

React Native creates a LaunchScreen.xib by default, so I&#39;ve created a LaunchImage inside Images.xcassets:

[![LaunchImage in Images.xcassets][1]][1]

I&#39;ve also read that I&#39;ve to modify the &quot;Launch Screen File&quot; under &quot;App Icons and Launch Images&quot; in my options:

[![Launch Images options][2]][2]

Once I&#39;ve done that, my launch screen became totally black and when the app is loaded, there are both top and bottom black frames:

[![enter image description here][3]][3]

So I don&#39;t know what I have to do to set my launch screen in my React Native project.

I&#39;ll be grateful if someone can help me out with those troubles.

Thanks in advance.


  [1]: https://i.stack.imgur.com/WLHds.png
  [2]: https://i.stack.imgur.com/Z0MpD.png
  [3]: https://i.stack.imgur.com/WfWw4.png

iOS Launch screen in React Native

I usually use custom UIColors on iOS using extensions with Swift, but now with iOS 11/ Xcode 9 we can create Colors Sets. How can we use them?

**Update - Tip**

As @Cœur says we can drag&amp;drop de color, and use it like a UIColor object and a possible solution could be use it as a extension:

[![UIColor as an extension][1]][1] 

 Or as a constant:

[![UIColor as a constant][2]][2]

Now I wanna know if we can access them like an UIImage access to an Asset Image or not, like:

    UIImage(named: &quot;image-name&quot;) -&gt; UIColor(named: &quot;color-name&quot;)
    


  [1]: https://i.stack.imgur.com/2bJpe.png
  [2]: https://i.stack.imgur.com/3cpV9.png

Content Type	Original Author	Original Content on Stackoverflow
Question	Arnold	View Question on Stackoverflow
Solution 1 - Ios	user2199783	View Answer on Stackoverflow

Xcode 6.1 Warning about Launch Image in Asset Catalog

Ios Problem Overview

Ios Solutions

Solution 1 - Ios

Is it possible to set a unique constraint using Entity Framework Code First?

How to force image (cache) update in README.rst on GitHub

Attributions