Apple News - WWDC 2016

Here are some new products announced by Apple in WWDC 2016:

1. iOS 10

iOS 10 Preview

Devices supported:

iPhone 5 and later iPhones
iPad 4 and later iPads
iPod Touch 6

List of iOS 10 Compatible iPhone, iPad, and iPod Touch Models

2. OS X -> macOS

macOS Sierra Preview

3. watchOS 3

watchOS 3 Preview

4. Swift Playgrounds

Swift Playgrounds app for iPad

5. App Development with Swift

iBook - App Development with Swift

More Information:

Everything Apple announced at WWDC 2016 in one handy list
蘋果WWDC 2016新品總整理
蘋果 2016 WWDC：Siri、Apple Maps、iMessage、通知通通開放 API！
內部融合大團結！iOS 10 這次不推創新，只求所有第三方 App 與 iOS 能綁得更緊密～
蘋果取巧地讓開發者為 iOS 10 原生 App 設計新功能

Select the iOS device or bluetooth audio output with action sheet

While playing a sound file with AVAudioPlayer, the following code may be used to select the audio output between the speaker of an iPhone/iPad or the bluetooth headset in an action sheet:

let buttonOutput = UIButton(frame: CGRectMake(0, 0, 200, 30))

buttonOutput.center = CGPointMake(view.center.x, view.center.y+200)

buttonOutput.setTitle("Output", forState: UIControlState.Normal)

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

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

buttonOutput.addTarget(self, action: #selector(buttonOutputPressed), forControlEvents: UIControlEvents.TouchUpInside)

view.addSubview(buttonOutput)

and

func buttonOutputPressed() {

        

    let model = UIDevice.currentDevice().model

        

    let session = AVAudioSession()

        

    let controller = UIAlertController(title: "Select Output", message: "", preferredStyle: UIAlertControllerStyle.ActionSheet)

        controller.addAction(UIAlertAction(title: model, style: UIAlertActionStyle.Default, handler: { action in

    do {

        try session.setCategory(AVAudioSessionCategoryPlayAndRecord, withOptions: AVAudioSessionCategoryOptions.DefaultToSpeaker)

    } catch {

        print("AVAudioSession error!")

    }

    }))

    controller.addAction(UIAlertAction(title: "Bluetooth", style: UIAlertActionStyle.Default, handler: { action in

    do {

        try session.setCategory(AVAudioSessionCategoryPlayAndRecord, withOptions: AVAudioSessionCategoryOptions.AllowBluetooth)

    } catch {

        print("AVAudioSession error!")

    }

    }))

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

}

Result:

Mac Technique: Copy the path of a file in Finder

To get the path of a file in Finder, just click the right mouse button on the file, and then press the alt/optoin key. The option Copy "Filename" is changed to Copy "Filename" as Pathname. Simply select it. Then paste the copied path to the place you like, such as the terminal.

Mac Technique: Display iPhone screen on Mac with QuickTime

Displaying the screen of an iPhone on a Mac is very easy!! Just use QuickTime Player.

Select File -> New Movie Recording

Select the down arrow at the right of the red record button. Then select the iPhone.

The screen of the iPhone is then displayed on Mac's screen.

Store data in plist with NSFileManager

This example is written in Swift 2.2 with Xcode 7.3.1.

For an iOS app, permanent data may be stored in CoreData, in a simple text file, or in a plist file. This example stores information in a plist file. The steps

1. Add a new property list file:

2. Edit the key, type and value of the plist as below:

3. Modify ViewController.swift as below:

import UIKit

class ViewController: UIViewController {

    var num   : Int = 0

    var label : UILabel!

    

    let path = NSHomeDirectory()+"/Documents/Storage.plist"

    var dictionary : NSMutableDictionary!

    let fileManager = NSFileManager.defaultManager()

    

    override func viewDidLoad() {

        

        super.viewDidLoad()

        

        checkFile()

        

        dictionary = NSMutableDictionary(contentsOfFile: path)

        

        let button = UIButton(frame: CGRectMake(0,0,100,30))

        button.center = view.center

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

        button.addTarget(self, action: #selector(btnGenerate), forControlEvents: UIControlEvents.TouchUpInside)

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

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

        view.addSubview(button)

        

        label = UILabel(frame: CGRectMake(0,0,100,30))

        label.center = CGPointMake(view.center.x, view.center.y-50)

        label.textAlignment = NSTextAlignment.Center

        label.text = "\(num)"

        view.addSubview(label)

        

        read()

        

        let buttonDel = UIButton(frame: CGRectMake(0,0,100,30))

        buttonDel.center = CGPointMake(view.center.x, view.center.y+50)

        buttonDel.setTitle("Delete plist", forState: UIControlState.Normal)

        buttonDel.addTarget(self, action: #selector(btnDel), forControlEvents: UIControlEvents.TouchUpInside)

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

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

        view.addSubview(buttonDel)

    }

    

    func btnGenerate() {

        num = Int(arc4random()%100)

        label.text = "\(num)"

        write()

        

        dictionary = NSMutableDictionary(contentsOfFile: path)

    }

    

    func btnDel() {

        print("btnDel")

        label.text = "0"

        do {

            try fileManager.removeItemAtPath(path)

        } catch {

            print("Unable to delete the plist file")

        }

    }

    

    func checkFile() {

        

        if !fileManager.fileExistsAtPath(path) {

            print("File not exist!")

            

            let srcPath = NSBundle.mainBundle().pathForResource("Storage", ofType: "plist")

            

            do {

                //Copy the project plist file to the documents directory.

                try fileManager.copyItemAtPath(srcPath!, toPath: path)

            } catch {

                print("File copy error!")

            }

        }

    }

    

    func read() {

        label.text = "\(dictionary!.objectForKey("Num")!)"

        print(dictionary!.objectForKey("Num")!)

    }

    

    func write() {

        dictionary.setValue(num, forKey: "Num")

        dictionary.writeToFile(path, atomically: true)

        print("write")

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

Related Information:

NSSearchPathForDirectoriesInDomains - Read/Write a file in an iOS app

Play a sound file with AVAudioPlayer

The example below plays an audio file in Swift 2.2 with Xcode 7.3.1.

1. Drag and add the example.mp3 sound file to the project.

2. Modify ViewController.swift as:

import UIKit

import AVFoundation

class ViewController: UIViewController {

    

    var button : UIButton!

    var buttonStop : UIButton!

    

    var player : AVAudioPlayer!

    let url = NSBundle.mainBundle().URLForResource("example", withExtension: "mp3")!

    override func viewDidLoad() {

        super.viewDidLoad()

        

        //Play/Pause button

        button = UIButton(frame: CGRectMake(0, 0, 200, 30))

        button.center = view.center

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

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

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

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

        view.addSubview(button)

        

        //Stop button

        buttonStop = UIButton(frame: CGRectMake(0, 0, 200, 30))

        buttonStop.center = CGPointMake(view.center.x, view.center.y+100)

        buttonStop.setTitle("Stop", forState: UIControlState.Normal)

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

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

        buttonStop.addTarget(self, action: #selector(buttonStopPressed), forControlEvents: UIControlEvents.TouchUpInside)

        buttonStop.hidden = true

        view.addSubview(buttonStop)

        

        do {

            player = try AVAudioPlayer(contentsOfURL: url)

        } catch {

            print("Error!")

        }

    }

    

    func buttonPressed() {

        if player.playing {

            player.pause()

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

        } else {

            player.play()

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

            buttonStop.hidden = false

        }

    }

    

    func buttonStopPressed() {

        player.stop()

        player.currentTime = 0 //rewind

        buttonStop.hidden = true

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

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

Mac Technique: Two Fingers with TrackPad - Right-Click and Scrolling

Right-Click

To perform the behavior of a right-click without a mouse, tap the TrackPad of a Mac with two fingers.

Scroll

To perform the behavior of the scroll wheel without a mouse, move two fingers on the TrackPad.



Apple's Official Information:

Use Multi-Touch gestures on your Mac