CS5530 Mobile/Wireless Systems More on Swift Yanyan Zhuang - - PowerPoint PPT Presentation

• Ref. CN5E, NT@UW, WUSTL

CS5530

CS5530 Mobile/Wireless Systems More on Swift

Yanyan Zhuang

Department of Computer Science http://www.cs.uccs.edu/~yzhuang

• UC. Colorado Springs

Overview

• Ref. CN5E, NT@UW, WUSTL

2 CS5530

• Optional
• WiFi interface
• Location manager

Optionals

• Ref. CN5E, NT@UW, WUSTL

3 CS5530

• Some variables (other than vars or constants)

either have a value, or nil

• To define an optional
• var optionalFloat: Float?
• Optional with forced unwrapping

WiFi interface

• Ref. CN5E, NT@UW, WUSTL

4 CS5530

• interfaces = CNCopySupportedInterfaces()
• Return all the available interfaces on your device (e.g., en0)
• As an array
• interfaceInfo =

CNCopyCurrentNetworkInfo(interfaces)

{ BSSID = "6c:f3:7f:ea:44:f1"; SSID = "UCCS-Wireless"; SSIDDATA = <55434353 2d576972 656c6573 73>; }

WiFi interface

• Ref. CN5E, NT@UW, WUSTL

5 CS5530

• ssid = interfaceInfo[kCNNetworkInfoKeySSID as

String] as? String

• UCCS-Wireless
• bssid = interfaceInfo[kCNNetworkInfoKeyBSSID

as String] as? String

• 6c:f3:7f:ea:44:f1

Code example

• Ref. MOS4E, OS@Austin, Columbia, UWisc

6 CS4500/5500

func getSSID() -> String? { var ssid, bssid, info: String? if let interfaces = CNCopySupportedInterfaces() as NSArray? { for interface in interfaces { print(interfaces) if let interfaceInfo = CNCopyCurrentNetworkInfo(interface as! CFString) as NSDictionary? { print(interfaceInfo) ssid = interfaceInfo[kCNNetworkInfoKeySSID as String] as? String bssid = interfaceInfo[kCNNetworkInfoKeyBSSID as String] as? String info = ssid! + ": " + bssid! break } } } return info }

iOS/Android devices

• Ref. CN5E, NT@UW, WUSTL

7 CS5530

• 3 iPhones, 3 iPads
• 2 Android phones, 2 Android tabs
• Check out @Ali

Location Manager

• Ref. CN5E, NT@UW, WUSTL

8 CS5530

• Core Location Framework
• var locationManager: CLLocationManager =

CLLocationManager()

• Location access permission
• locationManager.requestWhenInUseAuthorization()
• locationManager.requestAlwaysAuthorization()