MAC之Qt在Xcode8上编译错误（二）

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升级成Xcode8之后Qt编译之后经常会出现以下几个错误，其中：

Project ERROR: Xcode not set up properly. You may need to confirm the license agreement by running /usr/bin/xcodebuild.

这个问题在前一篇中已经解决了，可以参照MAC之Qt在Xcode8上编译错误（一）

下面介绍另外几个常见的错误和解决办法：

错误1:

Project ERROR: Current iphonesimulator SDK version (10.0) is too old. Please upgrade Xcode.

明明已经是最新的SDK版本，但是在编译的过程中还是会说版本不对，我也尝试了最新版本的Qt，在官网下载了Qt 5.7，还是会有这个问题，这里确实是Qt的配置文件不对，需要修改“QT_DIR/5.7/ios/mkspecs/macx-ios-clang/features/sdk.prf”里的内容，直接将：

lessThan(QMAKE_MAC_SDK_VERSION, "8.0"): \    error("Current $$QMAKE_MAC_SDK SDK version ($$QMAKE_MAC_SDK_VERSION) is too old. Please upgrade Xcode.")

这句话删除，不要修改QMAKE_MAC_SDK_VERSION的版本，8.0改成10.0貌似没有用，还是直接删了吧，前后diff的文件如下：

192:features shirny$ diff sdk.prf sdk_bak.prf 14a15,17> lessThan(QMAKE_MAC_SDK_VERSION, "8.0"): \>     error("Current $$QMAKE_MAC_SDK SDK version ($$QMAKE_MAC_SDK_VERSION) is too old. Please upgrade Xcode.")>

错误2:

先看看报错，着实很无语：

xcodebuild build -scheme test  -sdk iphonesimulator  -configuration Debug  -destination "id=12.9 inch" -destination-timeout 1Build settings from command line:    SDKROOT = iphonesimulator10.0xcodebuild: error: Unable to find a destination matching the provided destination specifier:        { id:12.9 inch }    Unsupported device specifier option.    The device “My Mac” does not support the following options: id    Please supply only supported device specifier options.    Available destinations for the "test" scheme:        { platform:iOS Simulator, id:B3F40C24-5D60-4E50-9752-72FCEBE12124, OS:10.0, name:iPad Air }        { platform:iOS Simulator, id:0EC6E7D4-29AE-467E-8690-06F5562BCFF3, OS:10.0, name:iPad Air 2 }        { platform:iOS Simulator, id:277E2258-C60B-4813-BE20-42B7698CEBE5, OS:10.0, name:iPad Pro (9.7 inch) }        { platform:iOS Simulator, id:63A51897-9CA4-4F78-903B-5DB2D6DA1135, OS:10.0, name:iPad Pro (12.9 inch) }        { platform:iOS Simulator, id:8D9B0429-EE0B-4F2A-88BD-863FF3363265, OS:10.0, name:iPad Retina }        { platform:iOS Simulator, id:30B53E9C-785A-49B4-AECE-217CCFD1FA31, OS:10.0, name:iPhone 5 }        { platform:iOS Simulator, id:E021930D-5D58-4C3E-B0C3-26C2BE7BA28E, OS:10.0, name:iPhone 5s }        { platform:iOS Simulator, id:7008A8CE-1542-4E3B-8DFA-4D5FD81A6B73, OS:10.0, name:iPhone 6 }        { platform:iOS Simulator, id:0FD3D8EB-F3FB-4D48-86C3-A92DFA3B1C6E, OS:10.0, name:iPhone 6 Plus }        { platform:iOS Simulator, id:E455FB97-B46D-47FC-8559-573FF9572196, OS:10.0, name:iPhone 6s }        { platform:iOS Simulator, id:400435BC-8C7D-42AF-92DD-7D79CE35A7D4, OS:10.0, name:iPhone 6s Plus }        { platform:iOS Simulator, id:1E6768EC-132A-4997-9052-E1F189466081, OS:10.0, name:iPhone 7 }        { platform:iOS Simulator, id:7447D592-68E5-44A6-9997-DCC65984EB92, OS:10.0, name:iPhone 7 Plus }        { platform:iOS Simulator, id:60038664-3B47-4C86-BC52-5C762EFBEC66, OS:10.0, name:iPhone SE }    Ineligible destinations for the "test" scheme:        { platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Generic iOS Simulator Device }make: *** [xcodebuild-debug-iphonesimulator] Error 70

关于iOS Simulator报错了，修改方法：
进入“QT_DIR/5.7/ios/mkspecs/macx-ios-clang ”修改xcodebuild.mk
Replace：

IPHONESIMULATOR_GENERIC_DESTINATION := "id=$(shell xcrun simctl list devices | grep -E 'iPhone|iPad' | grep -v unavailable | perl -lne 'print $$1 if /((.*?))/' | tail -n 1)"

With：

IPHONESIMULATOR_GENERIC_DESTINATION := "id=$(shell xcrun simctl list devices | grep -E 'iPhone|iPad' | grep -v unavailable | awk 'match ($$0, /\(([A-F0-9\-]*\))/ ) { print substr ($$0, RSTART+1, RLENGTH-2) }' | tail -n 1)"

前后diff的文件对比：

192:macx-ios-clang shirny$ diff xcodebuild.mk xcodebuild_bak.mk 74c74< IPHONESIMULATOR_GENERIC_DESTINATION := "id=$(shell xcrun simctl list devices | grep -E 'iPhone|iPad' | grep -v unavailable | awk 'match ($$0, /\(([A-F0-9\-]*\))/ ) { print substr ($$0, RSTART+1, RLENGTH-2) }' | tail -n 1)"---> IPHONESIMULATOR_GENERIC_DESTINATION := "id=$(shell xcrun simctl list devices | grep -E 'iPhone|iPad' | grep -v unavailable | perl -lne 'print $$1 if /\((.*?)\)/' | tail -n 1)"

你以为到这里就结束了，最起码我是这么认为的。

错误3

The following build commands failed: CopyPNGFile Debug-iphonesimulator/Test01.app/Default-568h@2x.png Test01.xcodeproj/Default-568h@2x.png

这个错误还是Xcode8搞得鬼，原因就是系统有两个xcrun文件，产生了冲突，所以进入“/Applications/Xcode.app/Contents/Developer/usr/bin/”修改“copying”：
Replace：

my $PNGCRUSH = `xcrun -f pngcrush`;

With：

my $PNGCRUSH = `/usr/bin/xcrun -f pngcrush`;

到这里我已经能编译成功了

/usr/bin/codesign --force --sign - --timestamp=none /Users/shirny/build-test-iphonesimulator_clang_Qt_5_7_0_for_iOS-Debug/Debug-iphonesimulator/test.app/Users/shirny/build-test-iphonesimulator_clang_Qt_5_7_0_for_iOS-Debug/Debug-iphonesimulator/test.app: replacing existing signature** BUILD SUCCEEDED **23:44:44: 进程"/usr/bin/make"正常退出。23:44:44: Elapsed time: 00:02.

目前遇到的雷区就上面几个，暂时先总结这些，有其他问题可以一起交流交流

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