MFMailComposeViewController - Write an email with an image attachment

Updated with Xcode 7.1/Swift 2.1 (November 11, 2015):

Edit ViewController.swift as:

import UIKit

import MessageUI

class ViewController: UIViewController, MFMailComposeViewControllerDelegate {

    

    var myUIImage : UIImage!

    

    override func viewDidLoad() {

        super.viewDidLoad()

        

        let button = UIButton(frame: CGRectMake(100, 100, 100, 20))

        button.setTitle("Press", forState: UIControlState.Normal)

        button.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal)

        button.setTitleColor(UIColor.cyanColor(), forState: UIControlState.Highlighted)

        button.addTarget(self, action: "emailButtonPressed:", forControlEvents: UIControlEvents.TouchUpInside)

        view.addSubview(button)

    }

    

    func emailButtonPressed(sender: UIButton) {

        

        let myController = MFMailComposeViewController()

        myController.mailComposeDelegate = self

        myController.setSubject("Hello 123")

        myController.setMessageBody("Hello World!", isHTML: false)

        myController.setToRecipients(["mymail@mymail.com"])

        

        let imageData = UIImagePNGRepresentation(UIImage(named: "image.png")!)

        myController.addAttachmentData(imageData!, mimeType: "image/png", fileName: "image")

        

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

    }

    func mailComposeController(controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, error: NSError?) {

        if result.rawValue == MFMailComposeResultSent.rawValue {

            self.dismissViewControllerAnimated(false, completion: {

                let alertController = UIAlertController(title: "", message: "Mail Sent!", preferredStyle: UIAlertControllerStyle.Alert)

                alertController.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))

            

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

            })

        }

        

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

Original post (December 28, 2014):

1. Create a UIButton and a UIImageView

2. Include an image file image.png (or a photo) in the project

3. Write the code as below:

import UIKit

import MessageUI

class ViewController: UIViewController, MFMailComposeViewControllerDelegate {

    @IBOutlet weak var myImage: UIImageView!

    

    var myUIImage : UIImage!

    

    @IBAction func emailButtonPressed(sender: UIButton) {

        

        var myController = MFMailComposeViewController()

        myController.mailComposeDelegate = self

        myController.setSubject("Hello 123")

        myController.setMessageBody("Hello World!", isHTML: false)

        myController.setToRecipients(["mymail@mymail.com"])

        

        var imageData = UIImagePNGRepresentation(myUIImage)

        myController.addAttachmentData(imageData, mimeType: "image/png", fileName: "image")

        

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

    }

    func mailComposeController(controller: MFMailComposeViewController!, didFinishWithResult result: MFMailComposeResult, error: NSError!) {

        if result.value == MFMailComposeResultSent.value {

            let alertView = UIAlertView()

            alertView.message = "Mail Sent!"

            alertView.addButtonWithTitle("OK")

            

            alertView.show()

        }

        self.dismissViewControllerAnimated(false, completion: nil)

    }

    override func viewDidLoad() {

        super.viewDidLoad()

        

        myUIImage = UIImage(named: "image.png")

        

        self.myImage.image = myUIImage

    }


Related Post:
Pick a photo from the device album and email it as attachment
Post a message and an image to Facebook (Deprecated)
Facebook SDK and Swift - Post a message and an image to Facebook
SLServiceTypeTwitter - Tweet from an iOS App

supportedInterfaceOrientations - Support Landscape orientations only.

Update March 18, 2016: 

It seems that the Swift 1 code below is no longer required for Xcode 7.2.1 (Swift 2.1.1).
Just define the portrait/landscape settings in the General ->Deployment Info -> Device Orientation section of the project settings.

========== Swift 1 code below ============

This disables the portrait orientation.

//Auto rotate is still enabled.

    override func shouldAutorotate() -> Bool {

        return true

    }

//Only the left and right landscape orientations are supported.

    override func supportedInterfaceOrientations() -> Int {

        return Int(UIInterfaceOrientationMask.LandscapeLeft.rawValue) | Int(UIInterfaceOrientationMask.LandscapeRight.rawValue)

    }

UIButton with an image. Scale: aspect fit.

Updated with Xcode 8.0/Swift 3 (September 19, 2016): 

override func viewDidLoad() {

    super.viewDidLoad()

        

    let image = UIImage(named: "image.png")

    let button = UIButton(frame: CGRect(x: 100, y: 100, width: 200, height: 200))

    button.imageView?.contentMode = UIViewContentMode.scaleAspectFit

    button.setImage(image, for: UIControlState.normal)

    button.addTarget(self, action: #selector(buttonPressed), for: UIControlEvents.touchUpInside)

    view.addSubview(button)

}

    

func buttonPressed() {

    print("button pressed!!")

}

Updated with Xcode 7.1.1/Swift 2.1 (November 12, 2015): 

    override func viewDidLoad() {

        super.viewDidLoad()

        

        let image = UIImage(named: "image.png")

        let button = UIButton(frame: CGRectMake(100, 100, 200, 200))

        button.imageView?.contentMode = UIViewContentMode.ScaleAspectFit

        button.setImage(image, forState: UIControlState.Normal)

        button.addTarget(self, action: "buttonPressed:", forControlEvents: UIControlEvents.TouchUpInside)

        self.view.addSubview(button)

    }

    

    func buttonPressed(sender: UIButton) {

        print("button pressed!!")

    }

Original post (December 17, 2014): 

   override func viewDidLoad() {

        super.viewDidLoad()

        

        let image = UIImage(named: "image.png") as UIImage!

        let button = UIButton.buttonWithType(UIButtonType.System) as UIButton

        button.frame = CGRectMake(100, 100, 200, 200)

        button.imageView?.contentMode = UIViewContentMode.ScaleAspectFit

        button.setImage(image, forState: .Normal)

        button.addTarget(self, action: "buttonPressed:", forControlEvents: UIControlEvents.TouchUpInside)

        self.view.addSubview(button)

    }

    func buttonPressed(sender: UIButton) {

        println("button pressed!!")

}

presentPopoverFromRect - Show a photo from the photo album to a popover with an iPad

1. Drag a UIImageView and Button to the storyboard.
Adjust the view mode of UIImageView to Aspect Fit

2. Control-drag to create:

    @IBOutlet weak var picture: UIImageView!

    

    @IBAction func photoAlbum(sender: UIButton) {

    }

3. Add delegates

class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate, UIPopoverControllerDelegate {

4. Complete Code:

class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate, UIPopoverControllerDelegate {

    @IBOutlet weak var picture: UIImageView!

    

    var myPopOverController : UIPopoverController!

    

    @IBAction func photoAlbum(sender: UIButton) {

        var myImagePickerController = UIImagePickerController()

        myImagePickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary

        myImagePickerController.delegate = self

        

        myPopOverController = UIPopoverController(contentViewController: myImagePickerController)

        

        myPopOverController.presentPopoverFromRect(sender.frame, inView: view, permittedArrowDirections: UIPopoverArrowDirection.Any, animated: true)

    }

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

        let myImage = info[UIImagePickerControllerOriginalImage] as UIImage

        self.picture.image = myImage

        myPopOverController.dismissPopoverAnimated(true)

    }

iOS Architecture - Cocoa Stack

APP

Cocoa Touch - UIKit

Media

Core Services - Foundation

Core OS


=====================

Link:
http://www.cnblogs.com/kkun/archive/2012/04/25/2470166.html


=====================

UIKit:
Prefix: UI
Examples: UIApplication, UIWindow, UIScreen, UIView, UIViewController...etc.

Foundation:
Prefix: NS
Examples: NSData, NSDate, NSInteger, NSArray, NSLog, ...etc.

CIFilter - Invert the photo color by built-in filter

//Updated December 22, 2014:
//Keep the photo orientation.

//Updated December 30, 2014
//Remove the error: BSXPCMessage received error for message: Connection interrupted
//Modify this: CIContext(options:[kCIContextUseSoftwareRenderer: true])

import UIKit

class ViewController: UIViewController,UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var picture: UIImageView!

    

    @IBAction func photoAlbum(sender: AnyObject) {

        if(UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.SavedPhotosAlbum)) {

            var pickerController = UIImagePickerController()

            pickerController.delegate = self

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

        }

    }

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

        

        let uiPictureSelected = info[UIImagePickerControllerOriginalImage] as UIImage

        let myOrientation : UIImageOrientation = uiPictureSelected.imageOrientation //Keep the photo orientation.

        let ciPictureSelected = CIImage(image:uiPictureSelected)

        var myFilter = CIFilter(name: "CIColorInvert")

        myFilter.setValue(ciPictureSelected, forKey: kCIInputImageKey)

        

        let ciOutputImage = myFilter.outputImage

        

        let ciContext = CIContext(options:[kCIContextUseSoftwareRenderer: true])

        let cgOutputImage = ciContext.createCGImage(ciOutputImage, fromRect: ciOutputImage.extent())

        

        let uiOutputImage = UIImage(CGImage: cgOutputImage, scale: 1, orientation: myOrientation)

        self.picture.image = uiOutputImage

        

        picker.dismissViewControllerAnimated(true, completion: nil)

    }

    override func viewDidLoad() {

        super.viewDidLoad()

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

    }

UIImagePickerControllerSourceType.Camera - Take a photo

1. Drag a UIImageView and Button to the storyboard.
Adjust the view mode of UIImageView to Aspect Fit

2. Control-drag to create:

    @IBOutlet weak var picture: UIImageView!

    

    @IBAction func takePhoto(sender: AnyObject) {

    }

3. Add delegates

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

4. Complete Code:

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var picture: UIImageView!

    

    @IBAction func takePhoto(sender: AnyObject) {

        if(UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)) {

            var pickerController = UIImagePickerController()

            pickerController.delegate = self

            pickerController.sourceType = UIImagePickerControllerSourceType.Camera

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

        }

    }

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

        let pictureTaken = info[UIImagePickerControllerOriginalImage] as UIImage

        self.picture.image = pictureTaken

        UIImageWriteToSavedPhotosAlbum(pictureTaken, nil, nil, nil)

        picker.dismissViewControllerAnimated(true, completion: nil)

    }

presentViewController(pickerController - Show a photo from the photo album

Updated with Xcode 7.1/Swift 2.1 (November 11, 2015):

Edit ViewController.swift as below:

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    var imageView : UIImageView!

    

    override func viewDidLoad() {

        super.viewDidLoad()

       

        let button = UIButton(frame: CGRectMake(70, 100, 200, 20))

        button.setTitle("Pick a Photo", forState: UIControlState.Normal)

        button.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal)

        button.setTitleColor(UIColor.cyanColor(), forState: UIControlState.Highlighted)

        button.addTarget(self, action: "photoAlbum:", forControlEvents: UIControlEvents.TouchUpInside)

        view.addSubview(button)

        

        imageView = UIImageView(frame: CGRectMake(50, 150, 200, 200))

        imageView.contentMode = UIViewContentMode.ScaleAspectFit

        view.addSubview(imageView)

    }

    

    func photoAlbum(sender: UIButton) {

        if(UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.SavedPhotosAlbum)) {

            let pickerController = UIImagePickerController()

            pickerController.delegate = self

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

        }

    }

    

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

        let pictureSelected = info[UIImagePickerControllerOriginalImage] as! UIImage

        imageView.image = pictureSelected

        picker.dismissViewControllerAnimated(true, completion: nil)

    }

    

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

Original Post (November 17, 2014):

1. Drag a UIImageView and Button to the storyboard.
Adjust the view mode of UIImageView to Aspect Fit

2. Control-drag to create:

    @IBOutlet weak var picture: UIImageView!

    

    @IBAction func photoAlbum(sender: AnyObject) {

    }

3. Add delegates

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

4. Complete Code:

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var picture: UIImageView!

    

    @IBAction func photoAlbum(sender: AnyObject) {

        if(UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.SavedPhotosAlbum)) {

            var pickerController = UIImagePickerController()

            pickerController.delegate = self

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

        }

    }

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

        let pictureSelected = info[UIImagePickerControllerOriginalImage] as UIImage

        self.picture.image = pictureSelected

        picker.dismissViewControllerAnimated(true, completion: nil)

    }

Related Post:

Pick a photo from the device album and email it as attachment

NSThread.detachNewThreadSelector

    override func viewDidLoad() {

        super.viewDidLoad()

        

        NSThread.detachNewThreadSelector(Selector("mythread"), toTarget: self, withObject: nil)

        

        println("End viewDidLoad()")

    }

    func mythread() {

        NSThread.sleepForTimeInterval(1.0)

        for var i = 1 ; i <= 5 ; i++ {

            println("\(i)")

        }

    }

==========================

Output:

End viewDidLoad()

1

2

3

4

5

MKDirections - Draw a route from location A to location B

Updated with Xcode 8.0 (Swift 3) on September 19, 2016.
Updated with Xcode 7.3.1 (Swift 2.2) on June 15, 2016.
Updated as a simple tutorial on May 25, 2015.

1. Disable 'Use Auto Layout' in the storyboard file inspector.

2. Drag a MapKit View to the storyboard.

3. Control-drag the MapKit View from the storyboard to ViewController.swift. Name the MapKit 'myMap'.

The result is:

@IBOutlet weak var myMap: MKMapView!

4. Complete the code as below:

Update (September 19, 2016): Xcode 8.0 (Swift 3)

import UIKit

import MapKit

class ViewController: UIViewController, MKMapViewDelegate {

    @IBOutlet weak var myMap: MKMapView!

    

    var myRoute : MKRoute!

    

    override func viewDidLoad() {

        super.viewDidLoad()

        

        let point1 = MKPointAnnotation()

        let point2 = MKPointAnnotation()

        

        point1.coordinate = CLLocationCoordinate2DMake(25.0305, 121.5360)

        point1.title = "Taipei"

        point1.subtitle = "Taiwan"

        myMap.addAnnotation(point1)

        

        point2.coordinate = CLLocationCoordinate2DMake(24.9511, 121.2358)

        point2.title = "Chungli"

        point2.subtitle = "Taiwan"

        myMap.addAnnotation(point2)

        myMap.centerCoordinate = point2.coordinate

        myMap.delegate = self

        

        //Span of the map

        myMap.setRegion(MKCoordinateRegionMake(point2.coordinate, MKCoordinateSpanMake(0.7,0.7)), animated: true)

        

        let directionsRequest = MKDirectionsRequest()

        let markTaipei = MKPlacemark(coordinate: CLLocationCoordinate2DMake(point1.coordinate.latitude, point1.coordinate.longitude), addressDictionary: nil)

        let markChungli = MKPlacemark(coordinate: CLLocationCoordinate2DMake(point2.coordinate.latitude, point2.coordinate.longitude), addressDictionary: nil)

        

        directionsRequest.source = MKMapItem(placemark: markChungli)

        directionsRequest.destination = MKMapItem(placemark: markTaipei)

        

        directionsRequest.transportType = MKDirectionsTransportType.automobile

        let directions = MKDirections(request: directionsRequest)

        

        directions.calculate(completionHandler: {

            response, error in

            

            if error == nil {

                self.myRoute = response!.routes[0] as MKRoute

                self.myMap.add(self.myRoute.polyline)

            }

            

        })

    }

    

    func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {

        

        let myLineRenderer = MKPolylineRenderer(polyline: myRoute.polyline)

        myLineRenderer.strokeColor = UIColor.red

        myLineRenderer.lineWidth = 3

        return myLineRenderer

    }

    

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

======

Update (June 15, 2016): Xcode 7.3.1 (Swift 2.2)

import UIKit

import MapKit

class ViewController: UIViewController, MKMapViewDelegate {

    

    @IBOutlet weak var myMap: MKMapView!

    

    var myRoute : MKRoute!

    

    override func viewDidLoad() {

        super.viewDidLoad()

        let point1 = MKPointAnnotation()

        let point2 = MKPointAnnotation()

        

        point1.coordinate = CLLocationCoordinate2DMake(25.0305, 121.5360)

        point1.title = "Taipei"

        point1.subtitle = "Taiwan"

        myMap.addAnnotation(point1)

        

        point2.coordinate = CLLocationCoordinate2DMake(24.9511, 121.2358)

        point2.title = "Chungli"

        point2.subtitle = "Taiwan"

        myMap.addAnnotation(point2)

        myMap.centerCoordinate = point2.coordinate

        myMap.delegate = self

        

        //Span of the map

        myMap.setRegion(MKCoordinateRegionMake(point2.coordinate, MKCoordinateSpanMake(0.7,0.7)), animated: true)

        

        let directionsRequest = MKDirectionsRequest()

        let markTaipei = MKPlacemark(coordinate: CLLocationCoordinate2DMake(point1.coordinate.latitude, point1.coordinate.longitude), addressDictionary: nil)

        let markChungli = MKPlacemark(coordinate: CLLocationCoordinate2DMake(point2.coordinate.latitude, point2.coordinate.longitude), addressDictionary: nil)

        

        directionsRequest.source = MKMapItem(placemark: markChungli)

        directionsRequest.destination = MKMapItem(placemark: markTaipei)

        directionsRequest.transportType = MKDirectionsTransportType.Automobile

        let directions = MKDirections(request: directionsRequest)

        directions.calculateDirectionsWithCompletionHandler({

            response, error in

            

            if error == nil {

                self.myRoute = response!.routes[0] as MKRoute

                self.myMap.addOverlay(self.myRoute.polyline)

            }

        

        })

    }

    

    func mapView(mapView: MKMapView, rendererForOverlay overlay: MKOverlay) -> MKOverlayRenderer {

        

        let myLineRenderer = MKPolylineRenderer(polyline: myRoute.polyline)

        myLineRenderer.strokeColor = UIColor.redColor()

        myLineRenderer.lineWidth = 3

        return myLineRenderer

    }

    

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

======

Previous Post (May 25, 2015):
import UIKit

import MapKit

import CoreLocation

class ViewController: UIViewController, MKMapViewDelegate {

    @IBOutlet weak var myMap: MKMapView!

    

    var myRoute : MKRoute?

    

    override func viewDidLoad() {

        super.viewDidLoad()

        var point1 = MKPointAnnotation()

        var point2 = MKPointAnnotation()

        

        point1.coordinate = CLLocationCoordinate2DMake(25.0305, 121.5360)

        point1.title = "Taipei"

        point1.subtitle = "Taiwan"

        myMap.addAnnotation(point1)

        

        point2.coordinate = CLLocationCoordinate2DMake(24.9511, 121.2358)

        point2.title = "Chungli"

        point2.subtitle = "Taiwan"

        myMap.addAnnotation(point2)

        myMap.centerCoordinate = point2.coordinate

        myMap.delegate = self

        

        //Span of the map

        myMap.setRegion(MKCoordinateRegionMake(point2.coordinate, MKCoordinateSpanMake(0.7,0.7)), animated: true)

        

        var directionsRequest = MKDirectionsRequest()

        let markTaipei = MKPlacemark(coordinate: CLLocationCoordinate2DMake(point1.coordinate.latitude, point1.coordinate.longitude), addressDictionary: nil)

        let markChungli = MKPlacemark(coordinate: CLLocationCoordinate2DMake(point2.coordinate.latitude, point2.coordinate.longitude), addressDictionary: nil)

        

        directionsRequest.setSource(MKMapItem(placemark: markChungli))

        directionsRequest.setDestination(MKMapItem(placemark: markTaipei))

        directionsRequest.transportType = MKDirectionsTransportType.Automobile

        var directions = MKDirections(request: directionsRequest)

        directions.calculateDirectionsWithCompletionHandler { (response:MKDirectionsResponse!, error: NSError!) -> Void in

            if error == nil {

                self.myRoute = response.routes[0] as? MKRoute

                self.myMap.addOverlay(self.myRoute?.polyline)

            }

        }

    }

    

    func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! {

        

        var myLineRenderer = MKPolylineRenderer(polyline: myRoute?.polyline!)

        myLineRenderer.strokeColor = UIColor.redColor()

        myLineRenderer.lineWidth = 3

        return myLineRenderer

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}

5. The result: