Swift Language

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 🙂

Realm – mobile database with Swift

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What is Realm?
Realm is a mobile database
Realm is a replacement for SQLite & Core Data.
It can save you thousands of lines of code & weeks of work,
and lets you craft amazing new user experiences.

Download the Realm framework for swift from https://realm.io/
[code language=”obj-c”]
import UIKit
import RealmSwift
class Person: Object {
dynamic var name = ""
dynamic var age = 0
}
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Initializing the object
let personObj1 = Person()
personObj1.name = "Ashish"
personObj1.age = 25
println("name of person : \(personObj1.name)")
// Writing it to realm
let realm = Realm()
realm.write {
realm.add(personObj1)
}
let personObj2 = Person()
personObj2.name = "Darshak"
personObj2.age = 27
realm.write {
realm.add(personObj2)
}
// Quering
let r = Realm().objects(Person).filter("age > 24")
println(r)
// Queries are chainable
let r2 = r.filter("name contains ‘Ashish’")
println(r2)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
[/code]
Output :
[code language=”obj-c”]
name of person : Ashish
Results<Person> (
[0] Person {
name = Ashish;
age = 25;
},
[1] Person {
name = Darshak;
age = 27;
}
)
Results<Person> (
[0] Person {
name = Ashish;
age = 25;
}
)
[/code]
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 😀

How to work with WatchKit in Swift Language – iOS 8 #Tutorial #CounterWithWatch

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Apple Watch represents a new chapter in the relationship people have with technology. Now you can deliver innovative new experiences to your customers on their wrist. And by adding WatchKit, you can take your apps even further by extending and enhancing their functionality on Apple Watch.

Lets learn how to work with WatchKit by an Counter Example.

Counter Watch Example
Counter Watch

Create New Project in XCode with Swift Language
New Project
New Project

Add Apple Watch Target in your Application
Add Target
Add Target

Select Apple Watch Target
Add Target Apple Watch
Add Target Apple Watch

Select Options for Target
Target Options
Target Options

Storyborad of watch
By adding target you will find the InterfaceController.swift and Interface.storyboard
Storyboard And Swift Files
Storyboard And Swift Files

Design watch with the controls
Design and reposition the controls with the properties of controls.
Design Controls in Watch
Design Controls in Watch

Now Time to do some code and connect the outlets
Connect Outlets
Connect Outlets

Code:
[code language=”obj-c”]
// InterfaceController.swift
import WatchKit
import Foundation
class InterfaceController: WKInterfaceController {
@IBOutlet weak var lblCounter: WKInterfaceLabel!
var counter:Int = 0
override func awakeWithContext(context: AnyObject?) {
super.awakeWithContext(context)
// Configure interface objects here.
}
override func willActivate() {
// This method is called when watch view controller is about to be visible to user
super.willActivate()
}
override func didDeactivate() {
// This method is called when watch view controller is no longer visible
super.didDeactivate()
}
@IBAction func upButtonPressed() {
counter = counter + 1
lblCounter.setText("\(counter)")
}
@IBAction func downButtonPressed() {
counter = counter – 1
lblCounter.setText("\(counter)")
}
}
[/code]
Download project with this stuff AppleWatchCounterDemo.zip
Thanks!
Happy Coding 😀

Passing data with Unwind Segue in Swift Language – iOS 8

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Unwind Segue Data
Unwind Segue Data

We have learn about Work with Unwind Segue in Swift Language – iOS 8 in first tutorial. Now we will learn how to pass the data with unwind segue.

It just simple.
Continue with the same example project.
Take data variables which you want to get in the parent view.
For example,
[code language=”obj-c”]
class ViewController2: UIViewController {
var data:String = "view 2 data"
….
}
[/code]

To get data from first view controller we have to get data from source view controller like follows :

[code language=”obj-c”]
@IBAction func unwindToVC(segue:UIStoryboardSegue) {
if(segue.sourceViewController .isKindOfClass(ViewController2))
{
var view2:ViewController2 = segue.sourceViewController as ViewController2
let alert = UIAlertView()
alert.title = "UnwindSegue Data"
alert.message = view2.data
alert.addButtonWithTitle("Ok")
alert.show()
}
if(segue.sourceViewController .isKindOfClass(ViewController3))
{
var view3:ViewController3 = segue.sourceViewController as ViewController3
let alert = UIAlertView()
alert.title = "UnwindSegue Data"
alert.message = view3.data
alert.addButtonWithTitle("Ok")
alert.show()
}
}
[/code]
Download project with this stuff UnwindSegueData.zip
Thanks!
Happy Coding 😀

Work with Unwind Segue in Swift Language – iOS 8

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Unwind - Exit
Unwind – Exit

An unwind segue (sometimes called exit segue) can be used to navigate back through push, modal or popover segues (as if you popped the navigation item from the navigation bar, closed the popover or dismissed the modally presented view controller). On top of that you can actually unwind through not only one but a series of push/modal/popover segues, e.g. “go back” multiple steps in your navigation hierarchy with a single unwind action.

To enable the Unwind Segue you need to add some code first.
[code language=”obj-c”]
@IBAction func unwindToVC(segue: UIStoryboardSegue) {
}
[/code]
You have to add this code in the view controller where you want to unwind (came back).

Unwind To View
Unwind To View

Suppose you want to came back from second or third view to first view then you have to add the code in first view.
Then just connect any control(Which contains action) with the unwind segue.
Unwind Segue
Unwind Segue

For check the particular view controller by unwind segue, use following code :
[code language=”obj-c”]
@IBAction func unwindToVC(segue:UIStoryboardSegue) {
if(segue.sourceViewController .isKindOfClass(ViewController2))
{
let alert = UIAlertView()
alert.title = "UnwindSegue"
alert.message = "Unwind from view 2"
alert.addButtonWithTitle("Ok")
alert.show()
}
if(segue.sourceViewController .isKindOfClass(ViewController3))
{
let alert = UIAlertView()
alert.title = "UnwindSegue"
alert.message = "Unwind from view 3"
alert.addButtonWithTitle("Ok")
alert.show()
}
}
[/code]
Download project with this stuff UnwindSegue.zip
In next tutorial you will find the topic Passing data with Unwind Segue in Swift Language – iOS 8
Thanks!
Happy Coding 😀

Google Place Autocomplete View With Swift Language through Alamofire networking library

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Google Place Autocomplete
Google Place Autocomplete

Add the Alamofire CocoaPods in your swift project.
alamofire
alamofire

Find your Google place API key on Google APIs Console.
GOOGLE PLACE API KEY
GOOGLE PLACE API KEY

ViewConroller.swift
[code language=”obj-c”]
import UIKit
class ViewController: UIViewController {
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
let gpaViewController = GooglePlacesAutocomplete(
apiKey: "YOUR API KEY",
placeType: .Address
)
gpaViewController.placeDelegate = self
presentViewController(gpaViewController, animated: true, completion: nil)
}
}
extension ViewController: GooglePlacesAutocompleteDelegate {
func placeSelected(place: Place) {
println(place.description)
}
func placeViewClosed() {
dismissViewControllerAnimated(true, completion: nil)
}
}
[/code]
GooglePlacesAutocomplete.xib
GooglePlacesAutocomplete.xib
GooglePlacesAutocomplete.xib

GooglePlacesAutocomplete.swift
[code language=”obj-c”]
import UIKit
import Alamofire
enum PlaceType: Printable {
case All
case Geocode
case Address
case Establishment
case Regions
case Cities
var description : String {
switch self {
case .All: return ""
case .Geocode: return "geocode"
case .Address: return "address"
case .Establishment: return "establishment"
case .Regions: return "regions"
case .Cities: return "cities"
}
}
}
struct Place {
let id: String
let description: String
}
protocol GooglePlacesAutocompleteDelegate {
func placeSelected(place: Place)
func placeViewClosed()
}
// MARK: – GooglePlacesAutocomplete
class GooglePlacesAutocomplete: UINavigationController {
var gpaViewController: GooglePlacesAutocompleteContainer?
var placeDelegate: GooglePlacesAutocompleteDelegate? {
get { return gpaViewController?.delegate }
set { gpaViewController?.delegate = newValue }
}
convenience init(apiKey: String, placeType: PlaceType = .All) {
let gpaViewController = GooglePlacesAutocompleteContainer(
apiKey: apiKey,
placeType: placeType
)
self.init(rootViewController: gpaViewController)
self.gpaViewController = gpaViewController
let closeButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Stop, target: self, action: "close")
gpaViewController.navigationItem.leftBarButtonItem = closeButton
gpaViewController.navigationItem.title = "Enter Address"
}
func close() {
placeDelegate?.placeViewClosed()
}
}
// MARK: – GooglePlaceSearchDisplayController
class GooglePlaceSearchDisplayController: UISearchDisplayController {
override func setActive(visible: Bool, animated: Bool) {
if active == visible { return }
searchContentsController.navigationController?.navigationBarHidden = true
super.setActive(visible, animated: animated)
searchContentsController.navigationController?.navigationBarHidden = false
if visible {
searchBar.becomeFirstResponder()
} else {
searchBar.resignFirstResponder()
}
}
}
// MARK: – GooglePlacesAutocompleteContainer
class GooglePlacesAutocompleteContainer: UIViewController {
var delegate: GooglePlacesAutocompleteDelegate?
var apiKey: String?
var places = [Place]()
var placeType: PlaceType = .All
convenience init(apiKey: String, placeType: PlaceType = .All) {
self.init(nibName: "GooglePlacesAutocomplete", bundle: nil)
self.apiKey = apiKey
self.placeType = placeType
}
override func viewDidLoad() {
super.viewDidLoad()
let tv: UITableView? = searchDisplayController?.searchResultsTableView
tv?.registerClass(UITableViewCell.self, forCellReuseIdentifier: "Cell")
}
}
// MARK: – GooglePlacesAutocompleteContainer (UITableViewDataSource / UITableViewDelegate)
extension GooglePlacesAutocompleteContainer: UITableViewDataSource, UITableViewDelegate {
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return places.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.searchDisplayController?.searchResultsTableView?.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
// Get the corresponding candy from our candies array
let place = self.places[indexPath.row]
// Configure the cell
cell.textLabel.text = place.description
cell.accessoryType = UITableViewCellAccessoryType.DisclosureIndicator
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
delegate?.placeSelected(self.places[indexPath.row])
}
}
// MARK: – GooglePlacesAutocompleteContainer (UISearchDisplayDelegate)
extension GooglePlacesAutocompleteContainer: UISearchDisplayDelegate {
func searchDisplayController(controller: UISearchDisplayController, shouldReloadTableForSearchString searchString: String!) -> Bool {
getPlaces(searchString)
return false
}
private func getPlaces(searchString: String) {
Alamofire.request(.GET,
"https://maps.googleapis.com/maps/api/place/autocomplete/json",
parameters: [
"input": searchString,
"type": "(\(placeType.description))",
"key": apiKey ?? ""
]).responseJSON { request, response, json, error in
if let response = json as? NSDictionary {
if let predictions = response["predictions"] as? Array<AnyObject> {
self.places = predictions.map { (prediction: AnyObject) -> Place in
return Place(
id: prediction["id"] as String,
description: prediction["description"] as String
)
}
}
}
self.searchDisplayController?.searchResultsTableView?.reloadData()
}
}
}
[/code]
I have learned this thing from Howard Wilson’s(watsonbox) Github Repository : watsonbox/ios_google_places_autocomplete
Happy coding 🙂

Requesting Access to the Address Book – Swift Language – iOS 8

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Request to Access Address Book
Request to Access Address Book

Here is simple steps to requesting access to the Address Book in Swift Language iOS 8
Import the framework of Address Book:
[code language=”objc”]
import AddressBook
[/code]
Create an object of Address Book:
[code language=”objc”]
var addressBook: ABAddressBookRef?
[/code]
Create a method for assigning the value to addressBook:
[code language=”objc”]
func createAddressBook(){
var error: Unmanaged<CFError>?
addressBook = ABAddressBookCreateWithOptions(nil, &error).takeRetainedValue()
}
[/code]
Post following code to requesting access:
[code language=”objc”]
switch ABAddressBookGetAuthorizationStatus(){
case .Authorized:
println("Already authorized")
createAddressBook()
/* Access the address book */
case .Denied:
println("Denied access to address book")
case .NotDetermined:
createAddressBook()
if let theBook: ABAddressBookRef = addressBook{
ABAddressBookRequestAccessWithCompletion(theBook,
{(granted: Bool, error: CFError!) in
if granted{
println("Access granted")
} else {
println("Access not granted")
}
})
}
case .Restricted:
println("Access restricted")
default:
println("Other Problem")
}
[/code]
Happy Coding 🙂

How to add an Objective-C file in your Swift Project? or How to set Objective-C bridging header?

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Bridging header
Bridging header

To import a set of Objective-C files in the same app target as your Swift code, you rely on an Objective-C bridging header to expose those files to Swift. Xcode offers to create this header file when you add an Objective-C file to an existing Swift app.

If you accept, Xcode creates the header file along with the file you were creating, and names it by your product module name followed by adding “-Bridging-Header.h”.

Alternatively, you can create a bridging header yourself by choosing File > New > File > (iOS or OS X) > Source > Header File.

You’ll need to edit the bridging header file to expose your Objective-C code to your Swift code.

To import Objective-C code into Swift from the same target

  1. In your Objective-C bridging header file, import every Objective-C header you want to expose to Swift.
    For example:
    [code language=”obj-c”]
    #import "XYZCustomCell.h"
    #import "XYZCustomView.h"
    #import "XYZCustomViewController.h"
    [/code]
  2. Under Build Settings, make sure the Objective-C Bridging Header build setting under Swift Compiler – Code Generation has a path to the header.

    The path should be relative to your project, similar to the way your Info.plist path is specified in Build Settings. In most cases, you should not need to modify this setting.

Any public Objective-C headers listed in this bridging header file will be visible to Swift. The Objective-C functionality will be available in any Swift file within that target automatically, without any import statements. Use your custom Objective-C code with the same Swift syntax you use with system classes.

For Example:
[code language=”obj-c”]
let myCell = XYZCustomCell()
myCell.subtitle = "A custom cell"
[/code]
Helping, Learning, Coding 🙂
Source : Apple Documents

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 🙂