These are now `enum`s. 

You can do:

    label.textAlignment = NSTextAlignment.center;

Or, for shorthand:

    label.textAlignment = .center;

**Swift 3**

    label.textAlignment = .center




Enums in Swift are different than they are in Objective-C.

What in Objective-C would be `NSTextAlignmentCenter` is in Swift `NSTextAlignment.Center`. 

For Centre use, `myLabel.textAlignment = NSTextAlignment.Center`

I have tested push notifications as a developer account and it worked, But when i tried to put it on TestFlight for the testers to test it, it didn&#39;t show a push notification but the data is correctly received, So is there a kind of certificate that i need to generate for TestFlight?

Why push notifications is not working on testflight?

I have two .cpp files namely `decryptor.cpp` and `prod-ent.cpp`.  
I have created a Makefile to for the compilation of both the files in Linux platform. 
 

    all: decryptor.cpp prod-ent.cpp
           g++ prod-ent.cpp -o prod-ent -g
           g++ decryptor.cpp -o decryptor -g -lcryptopp
    clean:
           rm prod-ent
           rm decryptor

Whenever I&#39;m trying to execute the Makefile its showing me the following error:  
    
&gt;Makefile:2: *** missing separator.  Stop.
    
I am new to create makefiles and cannot figure out my fault. Please help me in correcting the code. 

Thanks in advance !!



Makefile:2: *** missing separator. Stop

I create my UILabel in swift:
    
    let label = UILabel(frame: CGRect( x: 50, y: 50, width: 100, height: 50))

setting properties seems to be easy:

    label.textColor = UIColor.redColor()

How to implement enum types like textAlignment?
In Objective C it was

    label.textAlignment = NSTextAlignmentCenter;

but in swift it doesn&#39;t seem to work.

Swift. UILabel text alignment

I create my UILabel in swift:
<pre><code class="hljs language-less">let label = UILabel(frame: CGRect( x: 50, y: 50, width: 100, height: 50))
</code></pre>
setting properties seems to be easy:
<pre><code class="hljs language-ini">label.textColor = UIColor.redColor()
</code></pre>
How to implement enum types like textAlignment?
In Objective C it was
<pre><code class="hljs language-ini">label.textAlignment = NSTextAlignmentCenter;
</code></pre>
but in swift it doesn't seem to work.

I&#39;m trying to convert some of my Obj-C class to Swift. And some other Obj-C classes still using enum in that converted class. I searched In the Pre-Release Docs and couldn&#39;t find it or maybe I missed it. Is there a way to use Swift enum in Obj-C Class? Or a link to the doc of this issue?

This is how I declared my enum in my old Obj-C code and new Swift code.

my old Obj-C Code:


    typedef NS_ENUM(NSInteger, SomeEnum)
    {
        SomeEnumA,
        SomeEnumB,
        SomeEnumC
    };
    
    @interface SomeClass : NSObject
    
    ...
    
    @end

my new Swift Code:

    enum SomeEnum: NSInteger
    {
        case A
        case B
        case C
    };

    class SomeClass: NSObject
    {
        ...
    }

**Update:** From the answers. It can&#39;t be done in Swift older version than 1.2. But according to this official [Swift Blog][1]. In Swift 1.2 that released along with XCode 6.3, You can use Swift Enum in Objective-C by adding `@objc` in front of `enum` 


  [1]: https://developer.apple.com/swift/blog/?id=22

Is it possible to use Swift&#39;s Enum in Obj-C?

How can I deserialize  JSON string that contains enum values that are case insensitive? (using Jackson Databind)

The JSON string:

    [{&quot;url&quot;: &quot;foo&quot;, &quot;type&quot;: &quot;json&quot;}]


and my Java POJO:

    public static class Endpoint {
		
		public enum DataType {
			JSON, HTML
		}
		
		public String url;
		public DataType type;

		public Endpoint() {

		}

	}

in this case,deserializing the JSON with `&quot;type&quot;:&quot;json&quot;` would fail where as `&quot;type&quot;:&quot;JSON&quot;` would work.
But I want `&quot;json&quot;` to work as well for naming convention reasons.


Serializing the POJO also results in upper case `&quot;type&quot;:&quot;JSON&quot;`

I thought of using `@JsonCreator` and @JsonGetter:

        @JsonCreator
		private Endpoint(@JsonProperty(&quot;name&quot;) String url, @JsonProperty(&quot;type&quot;) String type) {
			this.url = url;
			this.type = DataType.valueOf(type.toUpperCase());
		}

        //....
        @JsonGetter
		private String getType() {
			return type.name().toLowerCase();
		}

  
And it worked. But I was wondering whether there&#39;s a better solutuon because this looks like a hack to me. 

I can also write a custom deserializer but I got many different POJOs that use enums and it would be hard to maintain.

Can anyone suggest a better way to serialize and deserialize enums with proper naming convention?

**I don&#39;t want my enums in java to be lowercase!**

Here is some test code that I used:

        String data = &quot;[{\&quot;url\&quot;:\&quot;foo\&quot;, \&quot;type\&quot;:\&quot;json\&quot;}]&quot;;
        Endpoint[] arr = new ObjectMapper().readValue(data, Endpoint[].class);
			System.out.println(&quot;POJO[]-&gt;&quot; + Arrays.toString(arr));
			System.out.println(&quot;JSON -&gt;&quot; + new ObjectMapper().writeValueAsString(arr));


Jackson databind enum case insensitive

There are examples on Swift book demonstrating associated values and raw values separately, is there a way to define enums with the two features together?

 I have tried to combine them, but got errors:

    enum Barcode :String {
        case UPCA(Int, Int, Int) = &quot;Order 1&quot; // Enum with raw type cannot have cases with arguments
        case QRCode(String) = &quot;Order 2&quot; // Enum with raw type cannot have cases with arguments
    }

Can associated values and raw values coexist in Swift enumeration?

How do I serialise a Python `Enum` member to JSON, so that I can deserialise the resulting JSON back into a Python object?  

For example, this code:

```python
from enum import Enum    
import json

class Status(Enum):
    success = 0

json.dumps(Status.success)
```
    
results in the error:

```none
TypeError: &lt;Status.success: 0&gt; is not JSON serializable
```

How can I avoid that?

Serialising an Enum member to JSON

I have the following enum defined:

    from enum import Enum
    class D(Enum):
        x = 1
        y = 2

    print(D.x)

now the printed value is 

    D.x

instead, I wanted the enum&#39;s value to be print 

    1

What can be done to achieve this functionality?

Getting value of enum on string conversion

How do I create a `UILabel` programmatically using Swift in Xcode 6?

I have started with a new &quot;Single View Application&quot; in Xcode 6 and selected Swift for this project. I have my files `AppDelegate.swift` and `ViewController.swift` and I&#39;m not sure what to do from here.


How to create UILabel programmatically using Swift?

`label.font.pointSize` is read-only, so I&#39;m not sure how to change it.

How do I change the font size of a UILabel in Swift?

I am trying to make a simple Coffee Calculator. I need to display the amount of coffee in grams. The &quot;g&quot; symbol for grams needs to be attached to my UILabel that I am using to display the amount. The numbers in the UILabel are changing dynamically with user input just fine, but I need to add a lower case &quot;g&quot; on the end of the string that is formatted differently from the  updating numbers. The &quot;g&quot; needs to be attached to the numbers so that as the number size and position changes, the &quot;g&quot; &quot;moves&quot; with the numbers. I&#39;m sure this problem has been solved before so a link in the right direction would be helpful as I&#39;ve googled my little heart out.

I&#39;ve searched through the documentation for an attributed string and I even downloded an &quot;Attributed String Creator&quot; from the app store, but the resulting code is in Objective-C and I am using Swift. What would be awesome, and probably helpful to other developers learning this language, is a clear example of creating a custom font with custom attributes using an attributed string in Swift. The documentation for this is very confusing as there is not a very clear path on how to do so. My plan is to create the attributed string and add it to the end of my coffeeAmount string.

    var coffeeAmount: String = calculatedCoffee + attributedText

Where calculatedCoffee is an Int converted to a string and &quot;attributedText&quot; is the lowercase &quot;g&quot; with customized font that I am trying to create. Maybe I&#39;m going about this the wrong way. Any help is appreciated!



How do I make an attributed string using 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

 1. From the storyboard I select the UILabel in question
 2. Then in Attribute Inspector &gt; Label &gt; [I choose] Attributed
 3. Also in Attribute Inspector &gt; Label &gt; Text&gt; [I select the content]
 4. Then I click on the font icon and choose underline

Basically, any change that I select from the Fonts window that pops up does not take effect. 

Has anyone ever successfully add underline from the storyboard?

Note: I already know how to do this in code. I want to avoid adding code.


Adding underline to UILabel attributed string from the storyboard fails

How can I do something like this? Take the first n elements from an array:
    
    newNumbers = numbers[0..n]

Currently getting the following error:

    error: could not find an overload for &#39;subscript&#39; that accepts the supplied arguments

EDIT:

Here is the function that I&#39;m working in.

    func aFunction(numbers: Array&lt;Int&gt;, position: Int) -&gt; Array&lt;Int&gt; {
        var newNumbers = numbers[0...position]
        return newNumbers
    }

New Array from Index Range Swift

I had been messing around with Swift for a while in XCode 6.0 DP to use it in my existing project. 
I am trying to access MyModel.h(My existing  Objective C Model object) from my ViewController.swift file. I wanted to import

`#import &quot;MyModel.h&quot;` to my Swift file. 
But I could not find how this can be done. 

How to import existing Objective C classes in Swift

I&#39;m learning Swift for iOS 8 / OSX 10.10 by following [this tutorial][1], and the term &quot;**unwrapped value**&quot; is used several times, as in this paragraph (under *Objects and Class*):

&gt; When working with optional values, you can write ? before operations
&gt; like methods, properties, and subscripting. If the value before the ?
&gt; is nil, everything after the ? is ignored and the value of the whole
&gt; expression is nil. Otherwise, **the optional value is unwrapped**, and
&gt; everything after the ? acts on the **unwrapped value**. In both cases, the
&gt; value of the whole expression is an optional value.
&gt; 

    let optionalSquare: Square? = Square(sideLength: 2.5, name: &quot;optional square&quot;) 
    let sideLength = optionalSquare?.sideLength

I don&#39;t get it, and searched on the web without luck.

What does this means?

---
## Edit

From Cezary&#39;s answer, there&#39;s a slight difference between the output of the original code and the final solution (tested on playground) :
### Original code
![Original code][2]
### Cezary&#39;s solution
![Cezary&#39;s solution][3]

The superclass&#39; properties are shown in the output in the second case, while there&#39;s an empty object in the first case.

Isn&#39;t the result supposed to be identical in both case?

**Related Q&amp;A : [What is an optional value in Swift?](https://stackoverflow.com/a/24026093/1437016)**

  [1]: https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/GuidedTour.html#//apple_ref/doc/uid/TP40014097-CH2
  [2]: http://i.stack.imgur.com/Ns3my.png
  [3]: http://i.stack.imgur.com/RsvFp.png

What is an &quot;unwrapped value&quot; in Swift?

I&#39;ve gone through the [iBook][1] from Apple, and couldn&#39;t find any definition of it:

Can someone explain the structure of `dispatch_after`?

    dispatch_after(&lt;#when: dispatch_time_t#&gt;, &lt;#queue: dispatch_queue_t?#&gt;, &lt;#block: dispatch_block_t?#&gt;)

  [1]: https://web.archive.org/web/20140719155151/https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/BuildingCocoaApps/BuildingCocoaApps.pdf

dispatch_after - GCD in Swift?

In the Introduction to Swift WWDC session, a read-only property `description` is demonstrated:

```swift
class Vehicle {
    var numberOfWheels = 0
    var description: String {
        return &quot;\(numberOfWheels) wheels&quot;
    }
}

let vehicle = Vehicle()
println(vehicle.description)
```

Are there any implications to choosing the above approach over using a method instead:

```swift
class Vehicle {
    var numberOfWheels = 0
    func description() -&gt; String {
        return &quot;\(numberOfWheels) wheels&quot;
    }
}

let vehicle = Vehicle()
println(vehicle.description())
```

It seems to me that the most obvious reasons for choosing a read-only computed property are:

 - **Semantics** - in this example it makes sense for `description` to be a property of the class, rather than an action it performs.
 - **Brevity/Clarity** - prevents the need to use empty parentheses when getting the value.

Clearly the above example is overly simple, but are there other good reasons to choose one over the other? For example, are there some features of functions or properties that would guide your decision of which to use?


----------


_N.B. At first glance this seems like quite a common OOP question, but I&#39;m keen to know of any Swift-specific features that would guide best practice when using this language._

Content Type	Original Author	Original Content on Stackoverflow
Question	Thorax	View Question on Stackoverflow
Solution 1 - Enums	Cezary Wojcik	View Answer on Stackoverflow
Solution 2 - Enums	yoeriboven	View Answer on Stackoverflow
Solution 3 - Enums	Ankit Goyal	View Answer on Stackoverflow

Swift. UILabel text alignment

Enums Problem Overview

Enums Solutions

Solution 1 - Enums

Solution 2 - Enums

Solution 3 - Enums

Makefile:2: *** missing separator. Stop

Why push notifications is not working on testflight?

Attributions