Swift 3

Swift 2.2 Warnings and It's Solutions – Xcode 7.3

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apple_swift_logo

Xcode 7.3 came with Swift 2.2 Version. I just updated to Xcode 7.3 and found following warnings because of Swift version change.

List of warnings with it’s solution:

  1. ‘var’ parameters are deprecated and will be removed in Swift 3

    2. Warning Function Var
    Warning Function Var

    Warning with:
    [code language=”obj-c”]
    func functionTest(var param:String) {
    print(param)
    }
    [/code]
    Solution:
    [code language=”obj-c”]
    func functionTest(param:String) {
    print(param)
    }
    [/code]
    If you want to update that variable inside the function then you have to create copy of that variable to do operations on that.

  2. Use of string literal for Objective-C selectors is deprecated; use ‘#selector’ instead

    3. Warning Selector
    Warning Selector

    Warning with:
    [code language=”obj-c”]
    btn.addTarget(self, action: "functionName", forControlEvents: UIControlEvents.TouchUpInside)
    [/code]
    OR
    [code language=”obj-c”]
    btn.addTarget(self, action: Selector("functionName"), forControlEvents: UIControlEvents.TouchUpInside)
    [/code]
    Solution:
    [code language=”obj-c”]
    btn.addTarget(self, action: #selector(ViewController.functionName), forControlEvents: UIControlEvents.TouchUpInside)
    [/code]
    Apple Documentation : Added information about the #selector syntax for Objective-C selectors to the Selector Expression section.

  3. ‘++’ is deprecated: it will be removed in Swift 3

    4. Warning ++
    Warning ++

    Warning with:
    [code language=”obj-c”]
    var i = 0
    for str in arrStr {
    print(str)
    i++
    }
    [/code]
    Solution:
    [code language=”obj-c”]
    var i = 0
    for str in arrStr {
    print(str)
    i += 1
    }
    [/code]
    Apple Documentation : Removed discussion of C-style for loops, the ++ prefix and postfix operators, and the — prefix and postfix operators.

  4. C-style for statement is deprecated and will be removed in a future version of Swift

    5. Warning For Statement
    Warning For Statement

    Warning with:
    [code language=”obj-c”]
    for var i=0; i<arrStr.count; i += 1 {
    print(arrStr[i])
    }
    [/code]
    Solution:
    [code language=”obj-c”]
    for i in 0 ..< arrStr.count {
    print(arrStr[i])
    }
    [/code]

  5. __FILE__ is deprecated and will be removed in Swift 3, please use #file

    6. Warning __FILE__
    Warning __FILE__

    Warning with:
    [code language=”obj-c”]
    __FILE__
    [/code]
    Solution:
    [code language=”obj-c”]
    #file
    [/code]

More swift tutorials/articles are available here.
Happy Coding 🙂

How to create a wrapper for Alamofire and SwiftyJSON? Swift – iOS

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This blogpost updated with Swift 3 – Xcode 8 – iOS 10 – Alamofire 4.0

AFWrapper
AFWrapper

I have posted a basic tutorial about Alamofire and SwiftyJSON How to use Alamofire and SwiftyJSON with Swift?
And some day before we have learned about Use of Blocks(Closures) or Completion Handlers with Function in Swift – iOS
Let’s combine both the topics to make a WRAPPER of Alamofire and SwiftyJSON.

Read more

How to use Alamofire and SwiftyJSON with Swift? – Swift 3 – iOS 10 – Xcode 8

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Swift JSON
Swift JSON

Alamofire is an HTTP networking library written in Swift.
SwiftyJSON makes it easy to deal with JSON data in Swift.

Read more

Create your own Slider menu (Drawer) in Swift

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This article is updated with Swift 4 – Xcode 9 – iOS 11

Why to use a library everytime?

Slider Menu (Drawer)
Slider Menu (Drawer)

Let’s create our own Slide Menu (Drawer) in Swift 4.
1. Create New Project in Xcode 9 with Swift Language
2. Design the Menu in UIViewController
Menu UIViewController
Menu UIViewController

Declaration of Variables and Protocols (Delegate) :

Following method is for updating the Items in the Menu :

Following method is for click event and animation :


3. Now we will create a Base UIViewController to use anywhere in the project which control the delegate of menu.
First we will create this 3 lines Drawer Icon via Code
Preview_Slider_Drawer_ICon

Delegate (Protocol) method call :

To open a view controller by identifier :
Set the Restoration Identifier and Storyboard Identifier. If current view is open then we will not open it once again for that we have to check via Restoration Identifier.

4. Now We will assign this drawer to any of the UIViewController
We have to use only one method to add drawer (slide menu) self.addSlideMenuButton()


Source Code is available at the Github AKSwiftSlideMenu

GitHub AKSwiftSlideMenu Releases
GitHub AKSwiftSlideMenu Releases

You can download for versions of Swift 2, Swift 3 or Swift 4. From Releases Tab at GitHub AKSwiftSlideMenu.

I have uploaded a video for easy way to integrate AKSwiftSlideMenu in your project :


Check other blog posts about Swift

Happy Coding 🙂

How to work with IBDesignable and IBInspectable in Swift Language?

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IBDesignable with Storyboard
IBDesignable with Storyboard

How to use the @IBDesignable and @IBInspectable?

By giving you a simple example that we can not change the corner radius from the design view. We have to change it run time. If you want to make possible it with design time then you can use the @IBDesignable and @IBInspectable.

So, We are taking an example as IBButtonExtender for this the functionality

  • Border Color
  • Border Width
  • Corner Radius

Create an Custom Class for UIButton with @IBDesignable

Create an @IBInspectable for Inspect the element. the Border Color property will be added to the list in the right panel when you create button with this class.

Set Initialization functions and other @IBInspectable as above.
You can check the code for the ButtonExtender.swift

IBButtonExtender

Presenting the ButtonExtender for Border Color, Border Width and Corner Radius function with the @IBDesignable and @IBInspectable in the Swift Language.

By making some corner radius and colors, You will get neat and clean output.

Output
Output

Github

Find IBButtonExtender on github 🙂
Check other articles on Swift Language.
All suggestions are acceptable. Put it in the comments!
Happy Coding 🙂

Facebook Login – Swift Language – iOS 10 – Swift 3

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Facebook Login using custom button in Swift Language
Xcode Version 8
Article is Updated with the Facebook 4.16 SDK [27-September-2016].
facebook-logo
Install Pods

Appdelegate.swift

ViewController.swift
Create touch up inside event for custom button like as follows

In iOS 10 don’t forget to set capabilities (Keychain Sharing) :
Go to your project targets -> Capabilities -> Keychain Sharing -> Toggle Switch ON

Capabilities - KeyChain Sharing
Capabilities – KeyChain Sharing

Detailed Output Log :

Happy Coding 😀

Update : JSON Array Parsing in Swift Language – Swift 3 – iOS 10 – Xcode 8

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Swift JSON
Swift JSON

So, how to parse following type of JSON?

Create JSON Array Object :

Parse JSON Array Object :

Complete code snippet with UITableView:

Posted a gist on github.
Helping, Learning, Coding 🙂

XML Parsing in Swift Language – iOS 10 – XMLParser

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XML Parsing in Swift Language
XML Parsing in Swift Language

Code syntax is changed in version Swift 3. So, I have updated this article with Xcode 8 – iOS 10

Here is tutorial about how to parse the XML data in Swift Language – iOS 10 – XMLParser
Start with creating object of XMLParser
[code language=”obj-c”]
var parser = XMLParser(contentsOf: urlToSend)!
parser.delegate = self
[/code]
Delegate your class with XMLParserDelegate
[code language=”obj-c”]
class ViewController: UIViewController,XMLParserDelegate {
}
[/code]
Add Delegate methods
[code language=”obj-c”]
func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
}
func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
}
func parser(_ parser: XMLParser, foundCharacters string: String) {
}
func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
}
[/code]
Parse the XML with following method
[code language=”obj-c”]
parser.parse()
[/code]
Complete sample code:
[code language=”obj-c”]
import UIKit
class ViewController: UIViewController,XMLParserDelegate {
var strXMLData:String = ""
var currentElement:String = ""
var passData:Bool=false
var passName:Bool=false
var parser = XMLParser()
@IBOutlet var lblNameData : UILabel! = nil
override func viewDidLoad() {
super.viewDidLoad()
let url:String="http://api.androidhive.info/pizza/?format=xml"
let urlToSend: URL = URL(string: url)!
// Parse the XML
parser = XMLParser(contentsOf: urlToSend)!
parser.delegate = self
let success:Bool = parser.parse()
if success {
print("parse success!")
print(strXMLData)
lblNameData.text=strXMLData
} else {
print("parse failure!")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
currentElement=elementName;
if(elementName=="id" || elementName=="name" || elementName=="cost" || elementName=="description")
{
if(elementName=="name"){
passName=true;
}
passData=true;
}
}
func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
currentElement="";
if(elementName=="id" || elementName=="name" || elementName=="cost" || elementName=="description")
{
if(elementName=="name"){
passName=false;
}
passData=false;
}
}
func parser(_ parser: XMLParser, foundCharacters string: String) {
if(passName){
strXMLData=strXMLData+"\n\n"+string
}
if(passData)
{
print(string)
}
}
func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
print("failure error: ", parseError)
}
}
[/code]
Code Demo on My Github. Both Swift 2.2 and Swift 3 versions are available.
Helping, Learning, Coding 🙂