Swift - 发送消息（文本,图片,文件等）给微信好友或分享到朋友圈

通过调用微信提供的API接口，我们可以很方便的在应用中发送消息给微信好友，或者分享到朋友圈。在微信开发平台（https://open.weixin.qq.com）里，提供了详细的说明文档和样例。但由于提供的样例是使用Objective-C写的，所以这边我写了个Swift版的样例。

1，实现的功能

（1）可以发送各种类型的消息给好友，也可以分享到朋友圈

（2）发送的内容类型包括：纯文本，图片，链接，音乐，视频，gif表情，非gif表情，文件

2，效果图如下

3，注意事项：

（1）该样例必须连接手机进行真机调试

（2）还需要到微信开发平台注册应用id，下面代码里会用到（如果不注册，随便起个id来调试也没什么问题，就是收到消息下方会显示“未审核应用”）

4，详细步骤

（1）首先把微信SDK资源库拖入到项目中来（整个Resources文件夹）

（2）引入WXApi.h这个头文件

（3）编写代码

--- AppDelegate.swift ---

 import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    func application(application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // 注册app(这里随便取个名字)
        WXApi.registerApp("hangge_appid")
        return true
    }
    func applicationWillResignActive(application: UIApplication) {
    }
    func applicationDidEnterBackground(application: UIApplication) {
    }
    func applicationWillEnterForeground(application: UIApplication) {
    }
    func applicationDidBecomeActive(application: UIApplication) {
    }
    func applicationWillTerminate(application: UIApplication) {
    }
}

--- ViewController.swift ---

 import UIKit
class ViewController: UIViewController {
    //发送给好友还是朋友圈（默认好友）
    var _scene = WXSceneSession.value
     
    override func viewDidLoad() {
        super.viewDidLoad()
    }
     
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
     
    //切换发送给好友还是朋友圈
    @IBAction func changeScene(sender: UISegmentedControl) {
        if sender.selectedSegmentIndex == 0 {
            _scene = WXSceneSession.value
        }else{
            _scene = WXSceneTimeline.value
        }
    }
     
    //发送纯文本
    @IBAction func sendTextContent(sender: AnyObject) {
        var req = SendMessageToWXReq()
        req.bText = true
        req.text = "hangge.com 做最好的开发者知识平台。"
        req.scene = _scene
        WXApi.sendReq(req)
    }
     
    //发送图片
    @IBAction func sendImageContent(sender: AnyObject) {
        var message =  WXMediaMessage()
         
        //发送的图片
        var filePath =  NSBundle.mainBundle().pathForResource("image", ofType: "jpg")
        var image = UIImage(contentsOfFile:filePath!)
        var imageObject =  WXImageObject()
        imageObject.imageData = UIImagePNGRepresentation(image)
        message.mediaObject = imageObject
         
        //图片缩略图
        var width = 240.0 as CGFloat
        var height = width*image!.size.height/image!.size.width
        UIGraphicsBeginImageContext(CGSizeMake(width, height))
        image!.drawInRect(CGRectMake(0, 0, width, height))
        message.setThumbImage(UIGraphicsGetImageFromCurrentImageContext())
        UIGraphicsEndImageContext()
         
        var req =  SendMessageToWXReq()
        req.bText = false
        req.message = message
        req.scene = _scene
        WXApi.sendReq(req)
    }
     
    //发送链接
    @IBAction func sendLinkContent(sender: AnyObject) {
        var message =  WXMediaMessage()
         
        message.title = "欢迎访问 hangge.com"
        message.description = "做最好的开发者知识平台。分享各种编程开发经验。"
        message.setThumbImage(UIImage(named:"apple.png"))
         
        var ext =  WXWebpageObject()
        ext.webpageUrl = "http://hangge.com"
        message.mediaObject = ext
         
        var req =  SendMessageToWXReq()
        req.bText = false
        req.message = message
        req.scene = _scene
        WXApi.sendReq(req)
    }
     
    //发送音乐
    @IBAction func sendMusicContent(sender: AnyObject) {
        var message =  WXMediaMessage()
         
        message.title = "一无所有"
        message.description = "崔健"
        message.setThumbImage(UIImage(named:"apple.png"))
         
        var ext =  WXMusicObject()
        ext.musicUrl = "http://y.qq.com/i/song.html#p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
        ext.musicDataUrl = "http://stream20.qqmusic.qq.com/32464723.mp3"
        message.mediaObject = ext
         
        var req =  SendMessageToWXReq()
        req.bText = false
        req.message = message
        req.scene = _scene
        WXApi.sendReq(req)
    }
     
    //发送视频
    @IBAction func sendVideoContent(sender: AnyObject) {
        var message =  WXMediaMessage()
        message.title = "乔布斯访谈"
        message.description = "饿着肚皮，傻逼着。"
        message.setThumbImage(UIImage(named:"apple.png"))
         
        var ext =  WXVideoObject()
        ext.videoUrl = "http://v.youku.com/v_show/id_XNTUxNDY1NDY4.html"
        message.mediaObject = ext
         
        var req =  SendMessageToWXReq()
        req.bText = false
        req.message = message
        req.scene = _scene
        WXApi.sendReq(req)
    }
     
    //发送非gif格式的表情
    @IBAction func sendNonGifContent(sender: AnyObject) {
        var message =  WXMediaMessage()
        message.setThumbImage(UIImage(named:"res5thumb.png"))
         
        var ext =  WXEmoticonObject()
        var filePath = NSBundle.mainBundle().pathForResource("res5", ofType: "jpg")
        ext.emoticonData = NSData(contentsOfFile:filePath!)
        message.mediaObject = ext
         
        var req =  SendMessageToWXReq()
        req.bText = false
        req.message = message
        req.scene = _scene
        WXApi.sendReq(req)
    }
     
    //发送gif格式的表情
    @IBAction func sendGifContent(sender: AnyObject) {
        var message =  WXMediaMessage()
        message.setThumbImage(UIImage(named:"res6thumb.png"))
         
        var ext =  WXEmoticonObject()
        var filePath = NSBundle.mainBundle().pathForResource("res6", ofType: "gif")
        ext.emoticonData = NSData(contentsOfFile:filePath!)
        message.mediaObject = ext
         
        var req =  SendMessageToWXReq()
        req.bText = false
        req.message = message
        req.scene = _scene
        WXApi.sendReq(req)
    }
     
    //发送文件
    @IBAction func sendFileContent(sender: AnyObject) {
        var message =  WXMediaMessage()
        message.title = "ML.pdf"
        message.description = "Pro CoreData"
        message.setThumbImage(UIImage(named:"apple.png"))
         
        var ext =  WXFileObject()
        ext.fileExtension = "pdf"
        var filePath = NSBundle.mainBundle().pathForResource("ML", ofType: "pdf")
        ext.fileData = NSData(contentsOfFile:filePath!)
        message.mediaObject = ext
         
        var req =  SendMessageToWXReq()
        req.bText = false
        req.message = message
        req.scene = _scene
        WXApi.sendReq(req)
    }
}