情景
在新创建的ReactNative项目，运行命令：react-native init Hello
在项目文件夹下执行react-native run-ios，但是出现以下报错：
Command /bin/sh failed with exit code 1
** BUILD FAILED **
The following build commands failed:
PhaseScriptExecution Install\ Third\ Party /Users/shixinshan/Development/ReactNativeProjects/Mybaby/ios/build/Build/Intermediates/React.build/Debug-iphonesimulator/double-conversion.build/Script-190EE32F1E6A43DE00A8543A.sh
(1 failure)
Installing build/Build/Products/Debug-iphonesimulator/Mybaby.app
An error was encountered processing the command (domain=NSPOSIXErrorDomain, code=2):
Failed to install the requested application
An application bundle was not found at the provided path.
Provide a valid path to the desired application bundle.
Print: Entry, ":CFBundleIdentifier", Does Not Exist
Command failed: /usr/libexec/PlistBuddy -c Print:CFBundleIdentifier build/Build/Products/Debug-iphonesimulator/Mybaby.app/Info.plist
Print: Entry, ":CFBundleIdentifier", Does Not Exist
原因分析
init命令默认会创建最新的版本，而目前最新的0.45版本需要下载boost库编译。此库体积庞大，在国内即便*也很难下载成功，导致很多人无法正常运行iOS项目，推荐暂时使用0.44.3的版本。
解决方法
创建项目暂时先使用react-native init MyApp –version 0.44.3，指定某个版本。
你可以使用–version参数（注意是两个杠）创建指定版本的项目。例如react-native init MyApp –version 0.44.3。注意版本号必须精确到两个小数点。