环境如下：
OS X 10.9.4
XCODE 5.1.1
APPIUM 1.3.4
IOS 模拟器 7.1
JAVA+APPIUM

我使用 IPad 模拟器模拟 Safari 的操作，调用的代码如下，可以正常进入模拟器

DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability(MobileCapabilityType.BROWSER_NAME, "safari");
capabilities.setCapability(MobileCapabilityType.PLATFORM_NAME, "ios");
capabilities.setCapability(MobileCapabilityType.PLATFORM_VERSION, "7.1");
capabilities.setCapability(MobileCapabilityType.DEVICE_NAME, "iPad Simulator");
capabilities.setCapability(MobileCapabilityType.HAS_TOUCHSCREEN, true);
driver = new IOSDriver(new URL("http://127.0.0.1:4723/wd/hub"),
        capabilities);  
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);

但是在运行中只要调用关于 TouchAction 相关的 API 就会报错，比如代码：

driver.performTouchAction(new TouchAction(driver)).tap(btnSignIn);

或者

driver.tap(1, btnSignIn, 3);

运行到都会报错：

org.openqa.selenium.WebDriverException: Not yet implemented. Please help us: http://appium.io/get-involved.html (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 7 milliseconds
Build info: version: '2.44.0', revision: '76d78cf', time: '2014-10-23 20:03:00'
System info: host: 'adsl-172-10-1-110.dsl.sndg02.sbcglobal.net', ip: '172.10.1.110', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.9.4', java.version: '1.8.0_25'
Driver info: io.appium.java_client.ios.IOSDriver
Capabilities [{networkConnectionEnabled=false, safari=true, warnings={}, databaseEnabled=false, hasTouchScreen=true, deviceName=iPhone Simulator, platform=MAC, desired={platformVersion=7.1, browserName=safari, platformName=iOS, hasTouchScreen=true, deviceName=iPhone Simulator}, platformVersion=7.1, webStorageEnabled=false, locationContextEnabled=false, browserName=safari, takesScreenshot=true, javascriptEnabled=true, platformName=iOS}]
Session ID: c510e2c9-1f57-461c-abf4-49e8ddf32e81
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:408)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:204)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:156)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:599)
at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:180)
at io.appium.java_client.AppiumDriver.performTouchAction(AppiumDriver.java:304)
at io.appium.java_client.MultiTouchAction.perform(MultiTouchAction.java:74)
at io.appium.java_client.AppiumDriver.tap(AppiumDriver.java:331)
at debugs.REACHitTest.test(REACHitTest.java:49)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

球好心的大神们帮忙看看，有人跟我一样的问题么？？
急啊！！！