获取版本号[[NSBundle mainBundle] infoDictionary]

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很多朋友改版本号，通过改变属性，比如说self.versionLabel = @”1.0”，版本更新后，self.versionLabel = @”1.1”
如果通过这样改，那就很麻烦了。但是如果通过代码获取info的version信息，那就很方便，以后版本更换后，只需要改变info的version,就可以了。

//获取当前版本号

    NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
    NSLog(@"%@",infoDic);
    NSString *currentAppVersion = infoDic[@"CFBundleShortVersionString"];

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
);
}