AppiumDriver gives null pointer exception
问题 In my appium + testng app, what I have put is: package com.tribehr.ios.ios_test; import java.net.URL; import io.appium.java_client.AppiumDriver; import org.junit.After; import org.junit.Before; import org.openqa.selenium.*; import org.openqa.selenium.remote.CapabilityType; import org.openqa.selenium.remote.DesiredCapabilities; import org.testng.annotations.Test; import org.testng.Assert; public class NewTest { private AppiumDriver driver; @Before public void setUp() throws Exception { // set