This is not a valid Swift code, it&#39;s generated on the fly.

The `default` here means that there is some default value but the generator cannot visualize it right for you to see it. The default value is technically an inlined function, therefore it cannot be easily converted to a simple declaration.

You can see similar declarations for `assert`

    func assert(condition: @auto_closure () -&gt; Bool,
                _ message: StaticString = default,
                     file: StaticString = default,
                     line: UWord = default)

Where `file` defaults to `#file` (`__FILE__` in Swift 1.x) and `line` defaults to `#line` (`__LINE__` in Swift 1.x).

In the case of `NSLocalizedString`, the default value is `&quot;Localizable&quot;`, referencing the default localization file `Localizable.strings`.

In interviews I have been asked to explain the difference between abstraction and encapsulation.  My answer has been along the lines of

* **Abstraction** allows us to represent complex real world in simplest manner. It is the process of identifying the relevant qualities and behaviors an object should possess; in other words, to represent the necessary feature without representing the background details.

* **Encapsulation** is a process of hiding all the internal details of an object from the outside real world. The word &quot;encapsulation&quot;, is like &quot;enclosing&quot; into a &quot;capsule&quot;. It restricts clients from seeing its internal view where the behavior of the abstraction is implemented.

I think with above answer the interviewer was convinced, but then I was asked, if the purpose of both is hiding, then why there is a need to use encapsulation.  At that time I didn&#39;t have a good answer for this.

What should I have added to make my answer more complete?

What&#39;s the difference between abstraction and encapsulation?

So, I want my first level catch to be the one that handles the error. Is there anyway to propagate my error up to that first catch?

Reference code, not working (yet):

	Promise = require(&#39;./framework/libraries/bluebird.js&#39;);

	function promise() {
		var promise = new Promise(function(resolve, reject) {
			throw(&#39;Oh no!&#39;);
		});

		promise.catch(function(error) {
			throw(error);
		});
	}

	try {	
		promise();
	}
	// I WANT THIS CATCH TO CATCH THE ERROR THROWN IN THE PROMISE
	catch(error) {
		console.log(&#39;Caught!&#39;, error);
	}


Catching Errors in JavaScript Promises with a First Level try ... catch

When reading the initializer for a `NSLocalizedString` I see that some of the parameters are defaulted to a value `default`. What does the `default` keyword represent?

    func NSLocalizedString(key: String, tableName: String? = default, bundle: NSBundle = default, value: String = default, #comment: String) -&gt; String

Default keyword in Swift parameter

When reading the initializer for a <code>NSLocalizedString</code> I see that some of the parameters are defaulted to a value <code>default</code>. What does the <code>default</code> keyword represent?
<pre><code class="hljs language-swift">func NSLocalizedString(key: String, tableName: String? = default, bundle: NSBundle = default, value: String = default, #comment: String) -> String
</code></pre>

I am trying to change the font of a UIButton using Swift...

    myButton.font = UIFont(name: &quot;...&quot;, 10)

However `.font` is deprecated and I&#39;m not sure how to change the font otherwise.

Any suggestions?

How to change font of UIButton with Swift

I am trying to set the title on a Button to left. But everything i tried is not working. 

With: 

    UILabelButton.titleLabel.textAlignment = .Left

Or:

    UILabelButton.contentVerticalAlignment = UIControlContentVerticalAlignment // There is no left

The button title is still centered. 

Is there another Property? 

How to change Button Title Alignment in Swift?

How do you set the text for a `UILabel` to bold in Swift programmatically? 
My code so far:

        var label = UILabel(frame:theFrame)
        label.text = &quot;Foo&quot;


Setting UILabel text to bold

To distribute the app to our testers we use Xcode, which we do using the following process:

- Archive application
- Distribute for Ad-Hoc
- Choose provisioning profile
- Save the .ipa to a folder

But with **Xcode 6**, this workflow was changed a bit. I can still select the Ad-Hoc distribution option, but I cannot select the provisioning profile I want. This gives us no control over which signing certificate is used and the provisioning profile configuration (we use push notifications).

By default `iPhone distribution` signing identity is used and some kind of `XC Ad Hoc` provisioning profile is generated, which can be seen on image below:![Exporting IPA][1]
If you click the arrow near provisioning profile, it opens the folder with provisioning profiles.

So my question is:

**Is there any way in Xcode 6 to select the provisioning profile used with Ad Hoc distribution?**

Thanks!


  [1]: http://i.stack.imgur.com/4ssU0.png

Xcode 6 - How to pick signing certificate/provisioning profile for Ad-Hoc distribution?

I have a `UITableView` running under iOS 8 and I&#39;m using automatic cell heights from constraints in a storyboard.

One of my cells contains a single `UITextView` and I need it to contract and expand based on user input - tap to shrink/expand the text.

I&#39;m doing this by adding a runtime constraint to the text view and changing the constant on the constraint in response to user events:

    -(void)collapse:(BOOL)collapse; {
    
        _collapsed = collapse;
    
        if(collapse)
            [_collapsedtextHeightConstraint setConstant: kCollapsedHeight]; // 70.0
        else
            [_collapsedtextHeightConstraint setConstant: [self idealCellHeightToShowFullText]];
    
        [self setNeedsUpdateConstraints];
    
    }

Whenver I do this, I wrap it in `tableView` updates and call `[tableView setNeedsUpdateConstraints]`:

    [tableView beginUpdates];
    
    [_briefCell collapse:!_showFullBriefText];
    
    [tableView setNeedsUpdateConstraints];
    // I have also tried 
    // [self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationTop];
    // with exactly the same results.
    
    [tableView endUpdates];

When I do this, my cell does expand (and animates whilst doing it) but I get a constraints warning:

    2014-07-31 13:29:51.792 OneFlatEarth[5505:730175] Unable to simultaneously satisfy constraints.
    
	Probably at least one of the constraints in the following list is one you don&#39;t want. Try this: (1) look at each constraint and try to figure out which you don&#39;t expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you&#39;re seeing NSAutoresizingMaskLayoutConstraints that you don&#39;t understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 

    (
    
        &quot;&lt;NSLayoutConstraint:0x7f94dced2b60 V:[UITextView:0x7f94d9b2b200&#39;Brief text: Lorem Ipsum i...&#39;(388)]&gt;&quot;,
    
        &quot;&lt;NSLayoutConstraint:0x7f94dced2260 V:[UITextView:0x7f94d9b2b200&#39;Brief text: Lorem Ipsum i...&#39;]-(15)-|   (Names: &#39;|&#39;:UITableViewCellContentView:0x7f94de5773a0 )&gt;&quot;,
    
        &quot;&lt;NSLayoutConstraint:0x7f94dced2350 V:|-(6)-[UITextView:0x7f94d9b2b200&#39;Brief text: Lorem Ipsum i...&#39;]   (Names: &#39;|&#39;:UITableViewCellContentView:0x7f94de5773a0 )&gt;&quot;,
    
        &quot;&lt;NSLayoutConstraint:0x7f94dced6480 &#39;UIView-Encapsulated-Layout-Height&#39; V:[UITableViewCellContentView:0x7f94de5773a0(91)]&gt;&quot;
     )
    
    Will attempt to recover by breaking constraint 
    
    &lt;NSLayoutConstraint:0x7f94dced2b60 V:[UITextView:0x7f94d9b2b200&#39;Brief text: Lorem Ipsum i...&#39;(388)]&gt;

388 is my calculated height, the other constraints on the `UITextView` are mine from Xcode/IB.

The final one is bothering me - I&#39;m guessing that `UIView-Encapsulated-Layout-Height` is the calculated height of the cell when it is first rendered - (I set my `UITextView` height to be &gt;= 70.0) however it doesn&#39;t seem right that this derived constraint then overrules an updated user cnstraint.

Worse, although the layout code says it&#39;s trying to break my height constraint, it doesn&#39;t - it goes on to recalculate the cell height and everything draws as I would like.

So, what is `NSLayoutConstraint` `UIView-Encapsulated-Layout-Height` (I&#39;m guessing it is the calculated height for automatic cell sizing) and how should I go about forcing it to recalculate cleanly?

What is NSLayoutConstraint &quot;UIView-Encapsulated-Layout-Height&quot; and how should I go about forcing it to recalculate cleanly?

Is there a way/software to give precise time needed to execute a block of code written in Swift, other than the following?

    let date_start = NSDate()

    // Code to be executed 

    println(&quot;\(-date_start.timeIntervalSinceNow)&quot;)

How to benchmark Swift code execution?

In Swift, I&#39;m trying to get a random float between 0 and 1 but I can&#39;t seem to get the type conversions to work.

    func randomCGFloat() -&gt; CGFloat {
        return CGFloat(arc4random()) / UINT32_MAX
    }

I&#39;m getting a &#39;CGFloat&#39; is not convertible to &#39;UInt8&#39; error

Running Xcode 6.


Content Type	Original Author	Original Content on Stackoverflow
Question	LuckyLuke	View Question on Stackoverflow
Solution 1 - Ios	Sulthan	View Answer on Stackoverflow

Default keyword in Swift parameter

Ios Problem Overview

Ios Solutions

Solution 1 - Ios

Catching Errors in JavaScript Promises with a First Level try ... catch

What's the difference between abstraction and encapsulation?

Attributions