我想 java 运行自动安装.ipa 包，之前看过大师的帖子，指定.ipa 地址和 udid 就可以，试了一下还是不行，不是.app 的包，是签名过的.ipa 包，手动安装没有问题！
DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability("appium-version", "1.0");
capabilities.setCapability("platformName", "iOS");
capabilities.setCapability("platformVersion", "8.4");
capabilities.setCapability("deviceName", "iPhone 5c");
capabilities.setCapability("app", "/Users/eternally/Downloads/testscoe7.9.2(v3开发者证书测试接口).ipa");
capabilities.setCapability("udid","27914dfb88cedd20976995846287ac8b63d9eee7");
driver = new IOSDriver<MobileElement>(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);
info: [debug] And extra without-delay env: {}
info: [debug] And launch timeouts (in ms): {"global":90000}
info: [debug] [INST STDERR] 2015-08-17 16:46:05.371 instruments[37340:9212935] WebKit Threading Violation - initial use of WebKit from a secondary thread.
info: [debug] [INST STDERR] Instruments Trace Error : Target failed to run: The operation couldn’t be completed. (FBSOpenApplicationErrorDomain error 4.) : Failed to launch process with bundle identifier 'com.test.SeeTest'
info: [debug] [INSTSERVER] Instruments exited with code 253
info: [debug] Killall instruments
info: [debug] Instruments crashed on startup
info: [debug] We exceeded the number of retries allowed for instruments to successfully start; failing launch
info: [debug] Stopping iOS log capture
info: [debug] Running ios sim reset flow
info: [debug] Killing the simulator process
info: [debug] Killing any other simulator daemons
info: [debug] Killall iOS Simulator
info: [debug] On a real device; cannot clean device state
error: Failed to start an Appium session, err was: Error: Instruments crashed on startup
info: [debug] Cleaning up appium session
info: [debug] Error: Instruments crashed on startup
at [object Object].Instruments.onInstrumentsExit (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/appium-instruments/lib/instruments.js:440:31)
at [object Object].<anonymous> (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/appium-instruments/lib/instruments.js:353:12)
at ChildProcess.emit (events.js:110:17)
at Process.ChildProcess._handle.onexit (child_process.js:1074:12)
info: [debug] Responding to client with error: {"status":33,"value":{"message":"A new session could not be created. (Original error: Instruments crashed on startup)","origValue":"Instruments crashed on startup"},"sessionId":null}
info: <-- POST /wd/hub/session 500 29151.300 ms - 182
解决方法及排查过程：
