如何使用Watch Connectivity传输UIImage

要在iPhone和Apple Watch之间传输文件，您应该使用Watch
Connectivity，

WCSession

UIImage

NSData``didReceiveMessageData``WCSessionDelegate

您应该知道的第一件事是将您转换

UIImage

NSData

如果是PNG图片

let image = UIImage(named: "nameOfYourImage.jpg")let data = UIImagePNGRepresentation(image)

如果是JPG图片

let image = UIImage(named: "nameOfYourImage.jpg")let data = UIImageJPEGRepresentation(image, 1.0)

然后，您可以使用

WCSession

ViewController.swift

class ViewController: UIViewController, WCSessionDelegate {   override func viewDidLoad() {       super.viewDidLoad()       // Do any additional setup after loading the view, typically from a nib.       if WCSession.isSupported() {WCSession.defaultSession().delegate = selfWCSession.defaultSession().activateSession()       }       let image = UIImage(named: "index.jpg")!       let data = UIImageJPEGRepresentation(image, 1.0)       WCSession.defaultSession().sendMessageData(data!, replyHandler: { (data) -> Void in// handle the response from the device        }) { (error) -> Void in   print("error: (error.localizedDescription)")       }   }   override func didReceiveMemoryWarning() {       super.didReceiveMemoryWarning()       // Dispose of any resources that can be recreated.   }}

InterfaceController.swift

import WatchKitimport Foundationimport WatchConnectivityclass InterfaceController: WKInterfaceController, WCSessionDelegate {   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()       if WCSession.isSupported() {WCSession.defaultSession().delegate = selfWCSession.defaultSession().activateSession()       }    }   override func didDeactivate() {       // This method is called when watch view controller is no longer visible       super.didDeactivate()   }   func session(session: WCSession, didReceiveMessageData messagedata: NSData, replyHandler: (NSData) -> Void) {       guard let image = UIImage(data: messageData) else {return       }       // throw to the main queue to upate properly       dispatch_async(dispatch_get_main_queue()) { [weak self] in// update your UI here       }      replyHandler(messageData)   }}

在上面的代码中，当您打开时，

ViewController

UIImage

希望对您有所帮助。