無法讀取undefined屬性'targetNum'

Question

我正在嘗試通過示例Groceries教程，並且iOS平臺上的一切都很順利，但是當我嘗試tns run android --emulator時，我收到一條Cannot read property 'targetNum' of undefined錯誤消息。

如果我做./gradlew buildapk --debug我得到這些線路與錯誤：

23:35:07.082 [LIFECYCLE] [class org.gradle.TaskExecutionLogger] :processDebugResources FAILED 
23:35:07.083 [INFO] [org.gradle.execution.taskgraph.AbstractTaskPlanExecutor] :processDebugResources (Thread[main,5,main]) completed. Took 0.45 secs. 
23:35:07.083 [DEBUG] [org.gradle.execution.taskgraph.AbstractTaskPlanExecutor] Task worker [Thread[main,5,main]] finished, busy: 1.491 secs, idle: 0.011 secs 
23:35:07.089 [ERROR] [org.gradle.BuildExceptionReporter] 
23:35:07.090 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception. 
23:35:07.090 [ERROR] [org.gradle.BuildExceptionReporter] 
23:35:07.090 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong: 
23:35:07.090 [ERROR] [org.gradle.BuildExceptionReporter] Execution failed for task ':processDebugResources'. 
23:35:07.090 [ERROR] [org.gradle.BuildExceptionReporter] > com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/usr/local/opt/android-sdk/build-tools/23.0.3/aapt'' finished with non-zero exit value 1 
23:35:07.091 [ERROR] [org.gradle.BuildExceptionReporter] 
23:35:07.091 [ERROR] [org.gradle.BuildExceptionReporter] * Try: 
23:35:07.091 [ERROR] [org.gradle.BuildExceptionReporter] Run with --stacktrace option to get the stack trace. 
23:35:07.092 [LIFECYCLE] [org.gradle.BuildResultLogger] 
23:35:07.092 [LIFECYCLE] [org.gradle.BuildResultLogger] BUILD FAILED 

我已經運行tns doctor和驗證ANDROID_HOME變量。也升級到最新的核心模塊，並嘗試了一些cocoapods版本，因爲tns醫生一直在發送關於CocoaPods安裝不良的警告。

編輯：謝謝@dennis尋找解決方案。這是有，但我錯過了大淡藍色的警告框：

Answer 1

你有沒有建立一個Android虛擬設備（AVD）？有可能是因爲沒有Android模擬器連接到這個錯誤。我能夠用沒有配置AVD的新鮮repo重現錯誤，但是在設置了一個tns run android --emulator後，我的工作很順利。

如果你沒有一個AVD設置，您可以使用Android Studio和本指南啓動和運行：https://developer.android.com/studio/run/managing-avds.html