在开发中， 假如我们设置启动页面的时候， 需要判读一下我们的应用是不是第一次启动，或者 是不是版本的升级。然而我们需要在程序中，通过
//服务器获取当前的最新版本的版本号，报存到saveVersion
NSString *currentVersion = [[NSBundle mainBundle] infoDictionary][kBundleVersionKey]; //当前的版本
if ([currentVersion isEqualToString:saveVersion]) {
}else{
}
infoDic包含如下所有的信息：也就是我们的程序信息：
{
BuildMachineOSBuild = 15C50;
CFBundleDevelopmentRegion = en;
CFBundleExecutable = ZYGLaunchIntroductionDemo;
CFBundleIdentifier = "com.huaxinlongma.ZYGLaunchIntroductionDemo";
CFBundleInfoDictionaryVersion = "6.0";
CFBundleInfoPlistURL = "Info.plist -- file:///Users/lanouhn/Library/Developer/CoreSimulator/Devices/84454B75-C87C-4752-A24B-095EAAC00443/data/Containers/Bundle/Application/09AB9754-B19E-4F63-869B-B8D6C319EE85/ZYGLaunchIntroductionDemo.app/";
CFBundleName = ZYGLaunchIntroductionDemo;
CFBundleNumericVersion = 16809984;
CFBundlePackageType = APPL;
CFBundleShortVersionString = "1.0";
CFBundleSignature = "????";
CFBundleSupportedPlatforms = (
iPhoneSimulator
);
CFBundleVersion = 1;
DTCompiler = "com.apple.compilers.llvm.clang.1_0";
DTPlatformBuild = "";
DTPlatformName = iphonesimulator;
DTPlatformVersion = "9.2";
DTSDKBuild = 13C75;
DTSDKName = "iphonesimulator9.2";
DTXcode = 0720;
DTXcodeBuild = 7C68;
LSRequiresIPhoneOS = 1;
MinimumOSVersion = "8.1";
UIDeviceFamily = (
1
);
UILaunchStoryboardName = LaunchScreen;
UIRequiredDeviceCapabilities = (
armv7
);
UISupportedInterfaceOrientations = (
UIInterfaceOrientationPortrait,
UIInterfaceOrientationLandscapeLeft,
UIInterfaceOrientationLandscapeRight
);
}
这些并不是我们在程序info.plist 看到的那些key 值。很多都是 以BF为key 来进行字典的存储。