在開發中, 假如我們設置啓動頁面的時候, 需要判讀一下我們的應用是不是第一次啓動,或者 是不是版本的升級。然而我們需要在程序中,通過
//獲取當前版本號
NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
NSLog(@"%@",infoDic);
NSString *currentAppVersion = infoDic[@"CFBundleShortVersionString"];
{
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
);
}
這些並不是我們在程序info.plist 看到的那些key 值。很多都是 以BF爲key 來進行字典的存儲。
//獲取上次啓動應用保存的appVersion
NSString *version = [[NSUserDefaults standardUserDefaults] objectForKey:kAppVersion];
[version isEqualToString:currentAppVersion]; 這時候 來判斷是不是一個版本號 進行相應的實現。