Question

因为我从内部API获取外部API密钥，所以我想在app.js文件中动态加载外部脚本。

java.lang.Exception: No runnable methods
    at org.junit.runners.BlockJUnit4ClassRunner.validateInstanceMethods(BlockJUnit4ClassRunner.java:191)
    at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:128)
    at org.junit.runners.ParentRunner.validate(ParentRunner.java:416)
    at org.junit.runners.ParentRunner.<init>(ParentRunner.java:84)
    at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:65)
    at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:10)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.runners.model.RunnerBuilder.runners(RunnerBuilder.java:101)
    at org.junit.runners.model.RunnerBuilder.runners(RunnerBuilder.java:87)
    at org.junit.runners.Suite.<init>(Suite.java:102)
    at org.junit.runners.Suite.<init>(Suite.java:70)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:107)
    at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
    at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
    at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

上面的代码示例工作正常（在源代码中加载外部库）但我不知道如何在控制器或指令中处理它以等待它在执行某些指令之前正确加载。

我有一个使用此API的自动填充输入的表单页面。如果我直接刷新此页面，则在自动完成指令无法实例化之前，应用程序没有时间加载此外部库。我需要找到一种方法来等待加载库或在加载后重新指定该指令，或者找到一种更简洁的方法来加载lib。

import common from './common';

angular.module('app', [common])
  .run(['$rootScope', 'configService', ($rootScope, configService) => {
    $rootScope.googleApiIsReady = false;
    configService.getConfig().then((res) => {
      let script = document.createElement('script');
      script.setAttribute('type', 'text/javascript');
      script.setAttribute('src', 'https://maps.googleapis.com/maps/api/js?key=' + res.data.GOOGLE_MAP_API_KEY + '&libraries=places&language=en-US');
      document.getElementsByTagName('head')[0].appendChild(script);
      $rootScope.googleApiIsReady = true;
    }); 
  }]) 
;

Answer 1

根据@lakshay的建议，解决方法是在更改根范围值之前应用超时。

setTimeout(() => {
  // Wait 1 sec before active auto completion for the google map libs to be loaded.
  $rootScope.googleApiIsReady = true;
}, 1000);

等待AngularJS 1中动态加载的外部脚本

1 个答案: