How to make an notification on swift

to make a notification app is simple.

1, add code on ViewContrller.swift like this.

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.

    

        var localNotification:UILocalNotification = UILocalNotification()

        localNotification.alertAction = "Testing notifications"

        localNotification.alertBody = "hello world! "

        localNotification.fireDate = NSDate(timeIntervalSinceNow: 30)

        UIApplication.sharedApplication().scheduleLocalNotification(localNotification)

    

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}

2, add code on AppDelegate.swift like this.

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

        // Override point for customization after application launch.

        application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: UIUserNotificationType.Sound |

            UIUserNotificationType.Alert | UIUserNotificationType.Badge, categories:nil))

        

        return true

    }

3, run your simulator. Don't forget to waiting at home screen.

I referred here
https://www.topcoder.com/blog/notifications-in-ios-8-using-swift/

how to fix an error of notification " time zone = (null), repeat interval = 0, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = user info = (null)} with an alert but haven't received permission from the user to display alerts by swift

When I tried to make a notification, I encountered this error showing on debug area.

(shows your timezone)  time zone = (null), repeat interval = 0, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = (shows your fire date)  user info = (null)} with an alert but haven't received permission from the user to display alerts

It means iOS8 needs user's permission.

How to solve;

add code in func application( application : ---- ) on AppDelegate.swift like following.

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

        // Override point for customization after application launch.

        application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: UIUserNotificationType.Sound |

            UIUserNotificationType.Alert | UIUserNotificationType.Badge, categories:nil))

        

        return true

    }

FYI
http://stackoverflow.com/questions/24100313/ask-for-user-permission-to-receive-uilocalnotifications-in-ios-8

How to go back to home screen on iOS Simulator

There's no home button on iOS simulator though it is super simple to go back to home screen.

just use: 

Cmd + Shift + H

How to add Core Data to existence project on swift

First, Open your APPDelegate.swift and import core data by writing as

import UIKit

import CoreData

Next, add Core data file by click "File" -> "New" -> "File" -> core data on your OS version.

Next, add  NSManagedObjectContext, NSManagedObjectModel and NSPersistentStoreCoordinator to your app delegate to AppDelegate.swift 

You need to change the name of your project name and Data model name.

This is the standard code which is generated when you start your new project.

    

    // MARK: - Core Data stack

    

    lazy var applicationDocumentsDirectory: NSURL = {

       

        let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)

        return urls[urls.count-1] as! NSURL

        }()

    

    lazy var managedObjectModel: NSManagedObjectModel = {

   

        let modelURL = NSBundle.mainBundle().URLForResource("DATAMODELNAME", withExtension: "momd")!

        return NSManagedObjectModel(contentsOfURL: modelURL)!

        }()

    

    lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator? = {

    

        var coordinator: NSPersistentStoreCoordinator? = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)

        let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("PROJECTNAME.sqlite")

        var error: NSError? = nil

        var failureReason = "There was an error creating or loading the application's saved data."

        if coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil, error: &error) == nil {

            coordinator = nil

        

            var dict = [String: AnyObject]()

            dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"

            dict[NSLocalizedFailureReasonErrorKey] = failureReason

            dict[NSUnderlyingErrorKey] = error

            error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)

       

            NSLog("Unresolved error \(error), \(error!.userInfo)")

            abort()

        }

        

        return coordinator

        }()

    

    lazy var managedObjectContext: NSManagedObjectContext? = {

   

        let coordinator = self.persistentStoreCoordinator

        if coordinator == nil {

            return nil

        }

        var managedObjectContext = NSManagedObjectContext()

        managedObjectContext.persistentStoreCoordinator = coordinator

        return managedObjectContext

        }()

    

    // MARK: - Core Data Saving support

    

    func saveContext () {

        if let moc = self.managedObjectContext {

            var error: NSError? = nil

            if moc.hasChanges && !moc.save(&error) {

    

                NSLog("Unresolved error \(error), \(error!.userInfo)")

                abort()

            }

        }

    }

Next, add "self.saveContext()" to applicationWillTerminate 

    func applicationWillTerminate(application: UIApplication) {

        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.

        self.saveContext()

it's done!


I referred to this website for this work. please check 
http://craig24.com/2014/12/how-to-add-core-data-to-an-existing-swift-project-in-xcode/#comment-34489

How to fix the error " Unsupported Configuration Scene is unreachable due to lack of entry points and does not have an identifier for runtime access via -instantiateViewControllerWithIdentifier"

"Unsupported Configuration     Scene is unreachable due to lack of entry points and does not have an identifier  for runtime access via -instantiateViewControllerWithIdentifier"

I encounter it and didn't know what's happen.
but i found this is very common error when we use screen transition.
Xcode complain that there are no initial screen has been assigned.

if you are using "Navigation Controller" , then assign it as a " initial View Controller"
for assign, just check the checkbox as below.

easy.

How to create transition on swift

prepare two view controller on storyboard.
set button on first one.
ctrl + drag from the button to second view controller
select "show"

that's all.
this is primitive  way but we don't need any code nor navigation controller.

How to show Map on swift.

very simple.

add "MapKit View" from object library
add "MapKit framework" from Build Phases, " Link Binary With Libraries" by click "+" and chose MapKit framework.
add "import MapKit" on ViewController.swift


that's all.
great is MapKit framework.

How to Drop the Pin to the Map on swift

write in the "override fun viewDidLoad(){

        let AAA = MKPointAnnotation()

        let centerCoordinate = CLLocationCoordinate2D(latitude: 10.79661075, longitude: 106.69064892)

            AAA.coordinate = centerCoordinate

            AAA.title = "test"

            AAA.subtitle = "abced"

        self.theMap.addAnnotation(AAA)

"addAnnotation" helps you to drop the pin on the map.

*don't forget to declare the Map = MKMapView with import MapKit.

How to set Photo expand as much as possible on imagecell

1. select target image cell on document Outline
2. remove check from "Constrain to margins"
3. click four red constrains line beside of number.
4. set 0 to each
5. click Add 4 Constrains

how to create "method" on swift

method is written like this

func  MethodName (Argument Datatype) -> ReturnValue {

      code

}

how to add MapKit

1. choose project on the left menu

2. choose target 

3. click "+" of Link Binary --

4. select MapKit Framework

5. Open the ViewController and write "import MapKit"

how to open the Photo Library on iPhone

this is the minimum.

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate ,UINavigationControllerDelegate{

    @IBAction func openPhotoLibrary(sender: UIButton) {

        var photoPicker = UIImagePickerController()

        photoPicker.delegate = self

        photoPicker.sourceType = .PhotoLibrary

        

        self.presentViewController( photoPicker, animated: true, completion: nil)

        

    }

@https://www.youtube.com/watch?v=leyk3QOYJF0


complete ver of this instruction video
import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate ,UINavigationControllerDelegate{

    

    var photoImageView = UIImageView(frame: CGRectMake(40, 120, 200, 200))

    

    @IBAction func openPhotoLibrary(sender: UIButton) {
        var photoPicker = UIImagePickerController()
        photoPicker.delegate = self
        photoPicker.sourceType = .PhotoLibrary

        

        self.presentViewController( photoPicker, animated: true, completion: nil)

        

    }

   override func viewDidLoad() {
        super.viewDidLoad()

        self.view.addSubview(photoImageView)

    

        // Do any additional setup after loading the view, typically from a nib.

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

   }

    

    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject: AnyObject]) {

        

        photoImageView.image = info [UIImagePickerControllerOriginalImage]as? UIImage

        self.dismissViewControllerAnimated(false, completion: nil)

    }

}

how to solve the error of "Failed to instantiate the default view controller for UIMainStoryboardFile ‘Main’ – perhaps the designated entry point is not set?

stucked for an hour by this very fundamental error.

it's so simple to fix actually.

Check the "is initial View Controller".

Failed to instantiate the default view controller for UIMainStoryboardFile ‘Main’ – perhaps the designated entry point is not set?

how to create code for taking photo

success as a part of project.
http://www.ioscreator.com/tutorials/take-photo-tutorial-ios8-swift
still struggling with this though ( http://www.techotopia.com/index.php/An_Example_Swift_iOS_8_iPhone_Camera_Application)

import UIKit

var imagePicker: UIImagePickerController!

class ViewController: UIViewController ,UINavigationControllerDelegate, UIImagePickerControllerDelegate{

    @IBOutlet var imageView: UIImageView!

    

    @IBAction func takePhoto(sender: UIButton) {

        imagePicker = UIImagePickerController()

        imagePicker.delegate = self

        imagePicker.sourceType = .Camera

        

        presentViewController(imagePicker, animated: true, completion: nil)

        

    }

    

    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject :AnyObject]){

    imagePicker.dismissViewControllerAnimated(true, completion: nil)

    imageView.image = info [UIImagePickerControllerOriginalImage] as? UIImage

    }

    

    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}

isEqualToString have already been over on swift?

an error message showed that :
"String does not have  member named isEqualToString"

checked internet and found below.

I just change the "isEqualToString" to "is Equal", no showing error anymore but not sure it is correct or not.



http://stackoverflow.com/questions/24096708/isequaltostring-in-swift

7 Answers

activeoldestvote

up vote78down voteaccepted

With Swift you don't need anymore to check the equality with isEqualToString You can now use == Example:  let x = "hello" let y = "hello" let isEqual = (x == y)

Swift Tutorial for iOS: Part 4 - MapKit App Displaying World's Tallest Church | AppShocker

done.
simple but good to know how to make a pin with it's annotation..

import UIKit

import MapKit

class ViewController: UIViewController, MKMapViewDelegate {

    @IBOutlet weak var theMapview: MKMapView!

    override func viewDidLoad() {

        super.viewDidLoad()

        

        var latitude:CLLocationDegrees = 48.399193

        var longitude:CLLocationDegrees = 9/993341

        

        //zoom

        var latDelta:CLLocationDegrees = 0.01

        var longDelta:CLLocationDegrees = 0.01

        

        var theSpan:MKCoordinateSpan = MKCoordinateSpanMake(latDelta, longDelta)

        

        var churchLocation:CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)

        

        var theRegion: MKCoordinateRegion = MKCoordinateRegionMake(churchLocation, theSpan)

        

        self.theMapview.setRegion(theRegion, animated: true)

        

        var theUlmMinsterAnnotation = MKPointAnnotation()

        theUlmMinsterAnnotation.coordinate = churchLocation

        

        theUlmMinsterAnnotation.title = "ulm Minster"

        theUlmMinsterAnnotation.subtitle = "A famous church in Germany"

        

        self.theMapview.addAnnotation(theUlmMinsterAnnotation)

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}

https://www.youtube.com/watch?v=uB100xVS_Yc

how to add Navigation Controller

check your view controller is activated.

click Editor > embed in > Navigation Controller

how to resize the zoom level at mapping

  let spanX = 0.007
  let spanY = 0.007
  var newRegion = MKCoordinateRegion(center: theMap.userLocation.coordinate, span: MKCoordinateSpanMake(spanX, spanY))
   theMap.setRegion(newRegion, animated: true)

change the value of span.

other tracking system is here

http://www.johnmullins.co/blog/2014/08/14/location-tracker-with-maps/

how to output a sound to speaker

create instans
AVAudioSession.sharedInstance() 

add 

session.overrideOutputAudioPort(AVAudioSessionPortOverride.Speaker, error: nil)

http://stackoverflow.com/questions/28630833/change-avaudioplayer-output-to-speaker-in-swift

how to solved libc++abi.dylib: terminating with uncaught exception of type NSException

FYI
http://stackoverflow.com/questions/26442414/libcabi-dylib-terminating-with-uncaught-exception-of-type-nsexception-lldb

why it happened:
I drag the button on the main story board to view controller with define the name and action for UIbutton.
I realized I wrong the name and rename & drag again.

I found how to solved it after duplicating it.

HOW TO CHANGE the NAME of view controller.swift

when the name of View Controller has been changed, 

change also the name at Comment section and class at the third line.

finally, back to the story board and select the new name as following.

That's all.
@Udacity

How to Play Audio in Swift

var filePath = NSBundle.mainBundle().pathForResource("movie_quote", ofType: "mp3"){

            var filePathUrl = NSURL.fileURLWithPath(filePath)

            audioPlayer = AVAudioPlayer(contentsOfURL: filePathUrl, error: nil)

            audioPlayer.enableRate=true

with this code

1 

File -> add new file -> select audio file -> move to "supporting files " on Navigator.

the file is located to "movie_quote" 

2, 

    @IBAction func FastButton(sender: UIButton) {

        audioPlayer.stop()

        audioPlayer.rate = 2.0

        audioPlayer.play()

Action on User Interface Button with above code.
rate  enable to change the pitch.

today's Udacity's lecture.