无法转换类型NSMutableDictionary的值？到期望的参数类型[NSObject：AnyObject]！

Question

我想跳过使用Xcode 8测试版并转换我的代码，但我在这里遇到了一些问题，我使用Google AnalyticsSDK发送事件，这就是我在Swift 2.2中使用它的方式：

let tracker = GAI.sharedInstance().defaultTracker 
    tracker?.set(kGAIScreenName, value: "ViewController") 
    let builder = GAIDictionaryBuilder.createScreenView() 
    tracker?.send(builder?.build() as [NSObject:AnyObject]) 

但现在我想用斯威夫特3，它告诉我：

无法将类型NSMutableDicationary的值输入[NSObject的： AnyObject在胁迫。

Answer 1

您需要制作一个变量来保存您的NSMutableDictionary，然后将其传递给send()方法。

let dictionary = (builder?.build())! as NSMutableDictionary 
tracker?.send(dictionary as [NSObject: AnyObject]!) 

UPDATE：另一块干净的方式斯威夫特3

guard let tracker = GAI.sharedInstance().defaultTracker else { return } 
tracker.set(kGAIScreenName, value: "ViewController") 
guard let builder = GAIDictionaryBuilder.createScreenView() else { 
return } 
tracker.send(builder.build() as [NSObject:AnyObject]) 

Answer 2

使用我认为这将解决这一问题。在直接使用之前拆开可选件总是好的，否则你可能会后悔。

if let tracker = GAI.sharedInstance().defaultTracker, builder = GAIDictionaryBuilder.createScreenView() 
{     
    if let dict = builder.build(), mutableDict = dict as [NSObject: AnyObject]? 
    { 
     tracker.send(mutableDict) 
    } 
} 

Answer 3

SWIFT 3

下面代码屏幕跟踪使用

func trackScreen(screenName:String){ 
      let tracker = GAI.sharedInstance().defaultTracker  
      tracker?.set(kGAIScreenName, value: screenName) 
      let builder:NSObject = GAIDictionaryBuilder.createScreenView().build()  
      tracker?.send(builder as! [NSObject:AnyObject]) 
     } 

事件追踪

func eventTracking(){ 
    let tracker = GAI.sharedInstance().defaultTracker 
    let builder:NSObject = GAIDictionaryBuilder.createEvent(
    withCategory:"categoryName", 
    action:"ok button Clicked", 
    label:"button name", 
    value:nil).build() 
    tracker?.send(builder as! [NSObject:AnyObject]) 
    }