Swift集成友盟

友盟是一个非常强大的数据平台，经过多年的沉淀，被广大应用厂商所青睐，而且是免费的；是数据集成的不二之选。但是很遗憾，友盟并没有Swift版的sdk(期待推出啊)，可能是有自己的考虑，所以在集成的时候只能通过桥接OC的方式；在页面统计的时候有两种方式，一种是通过集成在基类的viewWillAppear和viewWillDisappear进行统计，另一种是采用AOP方式，调用运行时的Method Swizzing。我们这里采用了AOP的方式。

一、集成友盟sdk
1.我们这边只有用友盟做了数据统计，没有集成推送和分享等，所有在pods里配置统计的sdk即可(这边接入的是非idfa的sdk)

    pod 'UMengAnalytics-NO-IDFA'

2.进行桥接，首先创建一个OC的header文件，把友盟的SDK头文件导入，桥接的时候在Build settings里搜索Objective-C Bridging Header填入我们刚才创建好的头文件路径，配置好编译一下，编译成功之后就可以coding了

创建头文件
配置桥接文件路径

3.在应用启动时候进行配置

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // 统计
        let umconfig = UMAnalyticsConfig.sharedInstance()
        umconfig?.appKey = ""
        umconfig?.channelId = "AppStore"
        MobClick.start(withConfigure: umconfig)
        let version = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as! String
        MobClick.setAppVersion(version)
        return true
}

此时已经可以统计到日活和新增数据了，但是产品还有页面路径的需求，所有我们还要在页面里面做埋点

二、Swift调用Method Swizzing
这里我们封装一个UIViewController的category，分别hook了viewWillAppear和viewWillDisappear两个方法。

extension UIViewController {
    @objc func newViewWillAppear(_ animated: Bool) {
        self.newViewWillAppear(animated) //Incase we need to override this method
        MobClick.beginLogPageView(type(of: self).description())
        print("WillAppear" + type(of: self).description())
    }
    
    @objc func newViewWillDismissAppear(_ animated: Bool) {
        self.newViewWillAppear(animated) //Incase we need to override this method
        MobClick.endLogPageView(type(of: self).description())
        print("WillDisAppear" + type(of: self).description())
    }
    
    static func swizzleViewWillAppear() {
        //Make sure This isn't a subclass of UIViewController, So that It applies to all UIViewController childs
        if self != UIViewController.self {
            return
        }
        let _: () = {
            let originalSelector = #selector(UIViewController.viewWillAppear(_:))
            let swizzledSelector = #selector(UIViewController.newViewWillAppear(_:))
            let originalMethod = class_getInstanceMethod(self, originalSelector)
            let swizzledMethod = class_getInstanceMethod(self, swizzledSelector)
            method_exchangeImplementations(originalMethod!, swizzledMethod!);
        }()
    }
    
    static func swizzleViewWillDismissAppear() {
        //Make sure This isn't a subclass of UIViewController, So that It applies to all UIViewController childs
        if self != UIViewController.self {
            return
        }
        let _: () = {
            let originalSelector = #selector(UIViewController.viewWillDisappear(_:))
            let swizzledSelector = #selector(UIViewController.newViewWillDismissAppear(_:))
            let originalMethod = class_getInstanceMethod(self, originalSelector)
            let swizzledMethod = class_getInstanceMethod(self, swizzledSelector)
            method_exchangeImplementations(originalMethod!, swizzledMethod!);
        }()
    }

}

封装好之后记得在appdelegate里执行一下

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        UIViewController.swizzleViewWillAppear()
        UIViewController.swizzleViewWillDismissAppear()
        return true
}

好的，以上就是我们的swift集成友盟，这边已经测试通过，欢迎大家讨论!