我们最近将Xcode升级到7.3版。 从那时起，xcodebuild命令在设备上执行测试操作时失败。 通过Xcode UI进行测试没有问题
以下是例外：
2016-03-28 08:27:24.129 xcodebuild[20029:9747786] DVTAssertions: ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-10174/DVTFoundation/Utilities/DVTTask.m:252
Details: The launch path must be set before launching.
Object: <DVTiPhoneTask: 0x7fd96a67b8d0>
Method: -launchRunningTerminationHandlerOnQueue:error:terminationHandler:
Thread: <NSThread: 0x7fd969c53870>{number = 57, name = (null)}
Hints: None
这个例子成功了：
xcodebuild -workspace `pwd`/iComposer.xcworkspace -scheme XXXXXXX -configuration Debug -destination 'platform=iOS,id=XXXXXXX' CONFIGURATION_BUILD_DIR=`pwd`/Builds/
这个失败了（注意'测试'）：
xcodebuild -workspace `pwd`/iComposer.xcworkspace -scheme XXXXXXX -configuration Debug -destination 'platform=iOS,id=XXXXXXX' CONFIGURATION_BUILD_DIR=`pwd`/Builds/ test