Question

我对propTypes有疑问。如果查看LoginLayoutRoute.propTypes，我如何验证组件是否正在传递。

const LoginLayoutRoute = ({ component: Component, ...rest }) => (
  <Route
    {...rest}
    render={matchProps => (
      <LoginLayout>
        <Component {...matchProps} />
      </LoginLayout>
    )}
  />
)

LoginLayoutRoute.propTypes = {
  component: ...,
}

const RouterSetup = () => (
  <Router>
    <Switch>
      <LoginLayoutRoute path="/login" component={LoginPage} />
    </Switch>
  </Router>
)

Answer 1

我能够弄清楚。它看起来像这样：

  ------- beginning of crash
  05-28 20:52:04.514 19691-19691/com.wube.wubealpha E/AndroidRuntime:   FATAL      EXCEPTION: main
Process: com.wube.wubealpha, PID: 19691
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.wube.wubealpha/com.wube.wubealpha.MainActivity}: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
    at android.app.ActivityThread.-wrap12(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6077)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
 Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
    at java.util.ArrayList.get(ArrayList.java:411)
    at com.wube.wubealpha.MainActivity.onCreate(MainActivity.java:64)
    at android.app.Activity.performCreate(Activity.java:6662)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
    at android.app.ActivityThread.-wrap12(ActivityThread.java) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:154) 
    at android.app.ActivityThread.main(ActivityThread.java:6077) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)

验证PropTypes传递的组件

1 个答案: