# Xcode 9
You now have another option to add Color Sets or Named Colors to your assets. This is new in Xcode 9.

## 1. Adding Named Colors to Your Project
[![Adding Named Colors][1]][1]


In *.xcassets &gt; right-click &gt; New Color Set


## 2. Assigning Name Colors to Views
[![enter image description here][2]][2]

Your new Named Colors show up in your Color Picker now in their own section.


  [1]: https://i.stack.imgur.com/47wDH.gif
  [2]: https://i.stack.imgur.com/NxxBA.gif

# Custom Color Palette

In the Interface Builder&#39;s color dialog, choose the third tab. Click the gear and **New** to make a new custom color palette. You can name it whatever you want. Then click the plus (+) button to add a new color and name it. Use the color picker tool to set the color.

[![enter image description here][1]][1]

# Colors from RGB or Hex

Choose the second tab in the color dialog and select **RGB Sliders**. This will allow you to set the colors using RGB or hex values.

[![enter image description here][2]][2]

# More Help

- [XCode Tip: Color Palette][3]
- https://stackoverflow.com/questions/2889491/how-to-define-colors-in-xcodes-interface-builder
- https://stackoverflow.com/questions/2565008/how-do-i-enter-rgb-values-into-interface-builder


  [1]: http://i.stack.imgur.com/3csgK.png
  [2]: http://i.stack.imgur.com/HyuxM.png
  [3]: https://www.natashatherobot.com/xcode-color-palette/

Yes, you can create and edit a palette in IB and then share it with your team  This article has all the details: http://natashatherobot.com/xcode-color-palette/

Edit:
That link has expired. You can see the web archive here: https://web.archive.org/web/20210303015055/http://natashatherobot.com/xcode-color-palette/

But, using named colors in the asset catalog is a better way to go now.

I set up sliding tabs with two `Fragment`s each `Fragment` has a `Button` which goes to a `WebView`. The problem with this is when the `WebView` `Button` is clicked the sliding tabs are still activated and when a user tries to navigate within the `WebView` you end up swiping to the other tab. Is there a way in an on click method to disable the swiping ability of the tabs? Any help would be hugely appreciated!

Here the code:

    public class MyWebViewClass extends Fragment {

    private WebView mWebView;
    private Button mButton;

    public MyWebViewClass() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_webview, container, false);

        mWebView = (WebView) view.findViewById(R.id.WebView);

        mButton = (Button) view.findViewById(R.id.Button1);
        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mWebView.setVisibility(View.VISIBLE);
                mButton.setVisibility(View.GONE);
                mWebView.getSettings().setJavaScriptEnabled(true);
                mWebView.loadUrl(&quot;www.google.com&quot;);
            }
        });

        return view;
    }




Disable swiping between tabs

We need to streaming **live** audio (from a medical device) to web browsers with no more than 3-5s of end-to-end delay (assume 200mS or less network latency). Today we use a **browser plugin** (NPAPI) for **decoding**, **filtering** (high, low, band), and **playback** of the audio stream (delivered via Web Sockets).

**We want to replace the plugin.**

I was looking at various [Web Audio API demos][1] and the most of our required functionality (playback, gain control, filtering) appears to be available in [Web Audio API][2].  However, it is not clear to me if Web Audio API can be used for streamed sources as most of the Web Audio API makes use of short sounds and/or audio clips.

Can Web Audio API be used to play live streamed audio?

**Update (11-Feb-2015):**

After a bit more research and local prototyping, I am not sure **live audio streaming with Web Audio API** is possible.  As Web Audio API&#39;s **decodeAudioData** isn&#39;t really designed to handle random chunks of audio data (in our case delivered via WebSockets).  It appears to need the whole &#39;file&#39; in order to process it correctly.

See stackoverflow: 

 - [How to stream MP3 data via WebSockets with node.js and socket.io?][3]
 - [Define &#39;valid mp3 chunk&#39; for decodeAudioData (WebAudio API)][4]

 
Now it is possible with **createMediaElementSource** to connect an `&lt;audio&gt;` element to Web Audio API, but it has been my experience that the `&lt;audio&gt;` element induces a huge amount of end-to-end delay (15-30s) and there doesn&#39;t appear to be any means to reduce the delay to below 3-5 seconds.

I *think* the only solution is to use WebRTC with Web Audio API.  I was hoping to avoid WebRTC as it will require significant changes to our server-side implementation.

**Update (12-Feb-2015) Part I**:

I haven&#39;t completely eliminated the `&lt;audio&gt;` tag (need to finish my prototype).  Once I have ruled it out, I suspect the createScriptProcessor (deprecated but still supported) will be a good choice for our environment as I could &#39;stream&#39; (via WebSockets) our ADPCM data to the browser and then (in JavaScript) convert it to PCM.  Similar to what to Scott&#39;s library (see below) does using the createScriptProcessor.  This method doesn&#39;t require the data to be in properly sized &#39;chunks&#39; and critical timing as the decodeAudioData approach.

**Update (12-Feb-2015) Part II**:

After more testing, I eliminated the `&lt;audio&gt;` to Web Audio API interface because, depending on source type, compression and browser, the end-to-end delay can be 3-30s.  That leaves the createScriptProcessor method (See Scott&#39;s post below) or WebRTC.  After talking discussing with our decision makers, it has been decided we will take the WebRTC approach. I *assume* it will work. But it will require changes to our server side code.

I&#39;m going to mark the first answer, just so the &#39;question&#39; is closed.

Thanks for listening.  Feel free to add comments as needed.

  [1]: http://www.html5rocks.com/en/tutorials/webaudio/intro/
  [2]: http://webaudio.github.io/web-audio-api/
  [3]: https://stackoverflow.com/questions/8759842/how-to-stream-mp3-data-via-websockets-with-node-js-and-socket-io
  [4]: https://stackoverflow.com/questions/10470742/define-valid-mp3-chunk-for-decodeaudiodata-webaudio-api

Web Audio API for live streaming?

My current long term project utilizes a palette of custom colors. In code, we are using a category to access these colors by name. This works great but there are times, such as when building a nib, that these colors won&#39;t be set programmatically.

I am looking for a way to define a named set of colors. For instance, when setting a background color for a UIView, I would like my drop list in Interface Builder to list my custom colors by name. Does anyone know of a way to achieve this?

Add a custom color palette to Xcode Interface Builder

<p>My current long term project utilizes a palette of custom colors. In code, we are using a category to access these colors by name. This works great but there are times, such as when building a nib, that these colors won't be set programmatically.</p>
<p>I am looking for a way to define a named set of colors. For instance, when setting a background color for a UIView, I would like my drop list in Interface Builder to list my custom colors by name. Does anyone know of a way to achieve this?</p>


I have a `tableview`, where sometimes there might not be any results to list, so I **would like to put something up that says &quot;no results&quot;** if there are no results (either a label or one table view cell?).

Is there an easiest way to do this?

*I would try a `label` behind the `tableview` then hide one of the two based on the results, but since I&#39;m working with a `TableViewController` and not a normal `ViewController` I&#39;m not sure how smart or doable that is.*

I&#39;m also using `Parse` and subclassing as a `PFQueryTableViewController`:

    @interface TableViewController : PFQueryTableViewController

I can provide any additional details needed, just let me know!

**`TableViewController` Scene in Storyboard:**

![enter image description here][1]

**EDIT:** Per Midhun MP, here&#39;s the code I&#39;m using

    - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
    {
        NSInteger numOfSections = 0;
        if ([self.stringArray count] &gt; 0)
        {
            self.tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
            numOfSections                 = 1;
            //yourTableView.backgroundView   = nil;
            self.tableView.backgroundView = nil;
        }
        else
        {
            UILabel *noDataLabel         = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, self.tableView.bounds.size.width, self.tableView.bounds.size.height)];
            noDataLabel.text             = @&quot;No data available&quot;;
            noDataLabel.textColor        = [UIColor blackColor];
            noDataLabel.textAlignment    = NSTextAlignmentCenter;
            //yourTableView.backgroundView = noDataLabel;
            //yourTableView.separatorStyle = UITableViewCellSeparatorStyleNone;
            self.tableView.backgroundView = noDataLabel;
            self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
        }
        
        return numOfSections;
    }

And here&#39;s the View I&#39;m getting, it still has separator lines.  I get the feeling that this is some small change, but I&#39;m not sure why separator lines are showing up?

![enter image description here][2]


  [1]: http://i.stack.imgur.com/MN2Oz.png
  [2]: http://i.stack.imgur.com/St3pF.png

If no Table View results, display &quot;No Results&quot; on screen

I&#39;m new to iOS Development, I installed Alamofire as said in README, but I have this error as other users and I don&#39;t know how to solve it.


![a busy cat](https://cloud.githubusercontent.com/assets/5198677/6205016/3541530e-b55f-11e4-9b28-ae6fc815b984.png)


Module &#39;Alamofire&#39; has no member named &#39;request&#39;

I have a class and extension Swift file. After adding a delegate that I declared in another file to the class, Xcode shows this error

&gt; Declaration is only valid at file scope

at the extension line. I don&#39;t know what the problem is.

Can anyone help me to fix it?

    class ListViewController: UIViewController, AddItemViewControllerDelegate {...}

    extension ListViewController: UITableViewDataSource{
        func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
            tableView.deselectRowAtIndexPath(indexPath, animated: true)
            performSegueWithIdentifier(&quot;ShowDetail&quot;, sender: indexPath)
        }
    
    }




About &quot;Declaration is only valid at file scope&quot;

Guys I&#39;m having some trouble figuring out the key differences between the APNS (push notification) Developer (Sandbox) and Production modes. In particular I have the following questions:

1) Can I launch an app on the app-store with Push Notifications that is only registered for the APNS Developer Certificate? Or do I need to use to use APNS Production for apps I want to launch on the app store? 

2) In general, what are the functional reasons other than &quot;development on development APNS&quot; and &quot;production on production APNS&quot; that would inform my decision. In particular why would I choose to implement an APNS Developer certificate for my app at all and why not just run everything on a Production push account?

Here&#39;s what Apple says on it&#39;s website but it doesn&#39;t get to the heart of my question:

&gt;**Development:** Use the development environment for initial development and testing of the provider app. It provides the same set of services as the production environment, although with a smaller number of server units. The development environment also acts as a virtual device, enabling simulated end-to-end testing.
You access the development environment at gateway.sandbox.push.apple.com, outbound TCP port 2195.

&gt;**Production:** Use the production environment when building the production version of the provider app. Apps using the production environment must meet Apple’s reliability requirements.


iOS APNS Development [sandbox] vs Production

I have created an app on swift and tested it extensively using iPhone 6, iPhone 6 plus and iPhone 5 devices and all the simulators offered in Xcode. The app runs fine and does not crash when uploaded locally. (iOS 8)

I finally submitted a build for Testflight. The app consistently crashes at the same place after downloading the app through the Testflight build. 

Is there a known issue where uploaded builds run differently than locally created builds? And how can I debug the issue with the Testflight build? 

App Crashes Only On Testflight Build

Can I run Xcode in a docker container? I&#39;d like to dockerise an Xcode CI system, just wondering if this is possible.

Can I run Xcode in a docker container?

I noticed my current bash file has `export PATH=$PATH:/Applications/MAMP/library/bin
` which i put there to set up terminal access to mamp. I&#39;ve been trying to compile `-a MyApp a.xcodeproj` &amp; `open a.xcodeproj` but I&#39;m not sure which one to use and neither works. I also added this to the bash file after suggestion `$ alias xcode=&quot;open -a Xcode&quot;` It still doesn&#39;t work. I need a path/terminal expert to help me configure a way to run Xcode from the terminal because I&#39;m trying to use cocoa pods. 

How to open Xcode from terminal?

I have a list of libraries in my Pod file. I decide to add new one to Pod file. But I want to keep all my previous libraies without updates and just install (add) this one library

    pod &#39;JSAnimatedImagesView&#39;, &#39;~&gt; 1.0.0&#39;

so `pod update` and `pod install` update all libraries to newer versions, but I don&#39;t want to update them just install `pod &#39;JSAnimatedImagesView&#39;, &#39;~&gt; 1.0.0&#39;`

CocoaPods how to install only one new library

I am not finding an option for Hex color code in xib color picker in xcode.

But I have seen in stack over flow answer,
https://stackoverflow.com/a/27283783/4391112.

In this, image is having Hex color code option in color picker.


**Xcode version : 6.1.1**

How can i get that hex color code in color picker in xib.

Please suggest me.

Thanks
 

Update: Is there any plugin for xcode to select color in hexa color code. I am using xcode 6.1.1.

or is there any setting in xcode to change the colr in hexa code.

please help me guys



How to set Hex color code in xib in iOS

Consider the following simple view controller:

    class ViewController: UIViewController, UITableViewDataSource {
        @IBOutlet weak var tableView: UITableView!
        
        var items = [&quot;One&quot;, &quot;Two&quot;, &quot;Three&quot;]
        
        override func viewDidLoad() {
            super.viewDidLoad()
    
            self.tableView.registerClass(CustomTableViewCell.self, forCellReuseIdentifier: &quot;customCell&quot;)
            self.tableView.dataSource = self
        }
        
        func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -&gt; Int {
            return self.items.count;
        }
        
        func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -&gt; UITableViewCell {
            let cell = self.tableView.dequeueReusableCellWithIdentifier(&quot;customCell&quot;) as CustomTableViewCell
            cell.titleLabel!.text = self.items[indexPath.row]
            return cell
        }
    }

And custom cell view:

    class CustomTableViewCell: UITableViewCell {
        @IBOutlet weak var titleLabel: UILabel!   
    }

This code causes the following error.

&gt; fatal error: unexpectedly found nil while unwrapping an Optional value

`titleLabel` is nil —&#160;it&#39;s not clear why. Setting default properties of `UITableViewCell` (like `textLabel`) work just fine.

I&#39;m using a nib for the custom cell.

Both the labels and table views are correctly connected to their `IBOutlet`s.

![label][1]
![table view][2]

Both the prototype cell and the custom nib view are marked as having a `CustomTableViewCell` class.

I&#39;m new to iOS development, am I missing something obvious?

[Sample Xcode project available][3].


  [1]: http://i.stack.imgur.com/Lh5VC.png
  [2]: http://i.stack.imgur.com/RjKUK.png
  [3]: https://www.dropbox.com/s/vzewdc0fz8p9o9o/CustomTableViewCellExample.zip?dl=0

Custom table view cell: IBOutlet label is nil

I&#39;m using storyboards for the first time in my app

When I close Xcode, I have 0 warnings about misplaced views or anything pertaining to my storyboard. When I restart Xcode and open the storyboard, 3 out of my 15 scenes have misplaced view warnings.

Without touching anything (other than selecting the file), I can issue a `git status` and see that the .storyboard file has changes. If I `git diff`, I see this included in multiple areas of the file:

    &lt;variation key=&quot;widthClass=compact&quot; misplaced=&quot;YES&quot;&gt;
        &lt;rect key=&quot;frame&quot; x=&quot;8&quot; y=&quot;56&quot; width=&quot;130&quot; height=&quot;34&quot;/&gt;
    &lt;/variation&gt;

If an element already had `&lt;variation key=&quot;widthClass=Compact&quot;` node, then the `misplaced` attribute and `rect` node are added.

The only thing I have to do to get the warnings to go away is click on each one, make sure &quot;Update Frame&quot; is selected, and click &quot;Fix Misplacement&quot;. That fixes everything until I restart Xcode.

The basic structure of my scene is:
    
    UIView
        UICollectionView
            UICollectionReusableView
            UICollectionViewCell
            UICollectionViewCell
        UISegmentedControl
            

How can I prevent this from happening each time I restart?

Misplaced views each time Xcode restarts

I got an error on Xcode saying that there was no information about the view controller.

&gt; Could not insert new outlet connection: Could not find any information for the class named

Why is this happening?

[![Screenshot 1][1]][1]


  [1]: http://i.stack.imgur.com/ToKcH.png

Could not insert new outlet connection: Could not find any information for the class named

I typically like to create and design my uiviews in interface builder. Sometimes I need to create a single view in a xib that can be reused in multiple view controllers in a storyboard.

Reuse a uiview xib in storyboard

When I write my own `UIButton`-extended class and make it `@IBDesignable`, I receive two errors in Interface Builder, namely:

 * Main.storyboard: error: IB Designables: Failed to update auto layout status: The agent crashed because the fd closed
 * Main.storyboard: error: IB Designables: Failed to render instance of RandjeUIButton: The agent crashed

Here is my code:

    import UIKit
    
    @IBDesignable
    class RandjeUIButton: UIButton {
        required init(coder aDecoder: NSCoder) {
            super.init(coder: aDecoder)
            
            self.backgroundColor = UIColor.blackColor()
        }
    }

I am working in Xcode 7 beta 2 on OS X 10.11 beta 2. (Running in VM)


Content Type	Original Author	Original Content on Stackoverflow
Question	Pheepster	View Question on Stackoverflow
Solution 1 - Ios	Mark Moeykens	View Answer on Stackoverflow
Solution 2 - Ios	Suragch	View Answer on Stackoverflow
Solution 3 - Ios	Jerry	View Answer on Stackoverflow

Add a custom color palette to Xcode Interface Builder

Ios Problem Overview

Ios Solutions

Solution 1 - Ios

Xcode 9

1. Adding Named Colors to Your Project

2. Assigning Name Colors to Views

Solution 2 - Ios

Custom Color Palette

Colors from RGB or Hex

More Help

Solution 3 - Ios

Web Audio API for live streaming?

Disable swiping between tabs

Attributions