我有一个带有Azure后端的IOS应用程序,想要记录某些事件,如登录和应用程序用户正在运行的版本。
如何使用Swift返回版本和构建号?
我有一个带有Azure后端的IOS应用程序,想要记录某些事件,如登录和应用程序用户正在运行的版本。
如何使用Swift返回版本和构建号?
当前回答
斯威夫特5.3
let infoDictionaryKey = kCFBundleVersionKey as String
guard let currentVersion = Bundle.main.object(forInfoDictionaryKey: infoDictionaryKey) as? String
else { fatalError("Expected to find a bundle version in the info dictionary") }
其他回答
以下是Swift 3.2的更新版本:
extension UIApplication
{
static var appVersion:String
{
if let appVersion = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString")
{
return "\(appVersion)"
}
return ""
}
static var buildNumber:String
{
if let buildNum = Bundle.main.object(forInfoDictionaryKey: kCFBundleVersionKey as String)
{
return "\(buildNum)"
}
return ""
}
static var versionString:String
{
return "\(appVersion).\(buildNumber)"
}
}
Swift 5作为UIApplication扩展
extension UIApplication {
static var release: String {
return Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as! String? ?? "x.x"
}
static var build: String {
return Bundle.main.object(forInfoDictionaryKey: "CFBundleVersion") as! String? ?? "x"
}
static var version: String {
return "\(release).\(build)"
}
}
使用示例:
print("release: \(UIApplication.release)")
print("build: \(UIApplication.build)")
print("version: \(UIApplication.version)")
Swift 5更新
这是一个函数,我使用来决定是否显示“应用程序更新”页面或不。它返回版本号,我正在将其转换为Int类型:
if let version: String = Bundle.main.infoDictionary?["CFBundleVersion"] as? String {
guard let intVersion = Int(version) else { return }
if UserDefaults.standard.integer(forKey: "lastVersion") < intVersion {
print("need to show popup")
} else {
print("Don't need to show popup")
}
UserDefaults.standard.set(intVersion, forKey: "lastVersion")
}
如果以前从未使用过,它将返回0,小于当前版本号。若要不向新用户显示这样的屏幕,只需在首次登录后或登录完成时添加构建号。
针对Swift 3.0更新
在Swift 3.0中,ns前缀已经没有了,一些属性/方法的名称已经更改为更Swifty。这是现在的样子:
extension Bundle {
var releaseVersionNumber: String? {
return infoDictionary?["CFBundleShortVersionString"] as? String
}
var buildVersionNumber: String? {
return infoDictionary?["CFBundleVersion"] as? String
}
}
Bundle.main.releaseVersionNumber
Bundle.main.buildVersionNumber
更新答案
I've been working with Frameworks a lot since my original answer, so I wanted to update my solution to something that is both simpler and much more useful in a multi-bundle environment: extension NSBundle { var releaseVersionNumber: String? { return self.infoDictionary?["CFBundleShortVersionString"] as? String } var buildVersionNumber: String? { return self.infoDictionary?["CFBundleVersion"] as? String } } Now this extension will be useful in apps to identify both the main bundle and any other included bundles (such as a shared framework for extension programming or third frameworks like AFNetworking), like so: NSBundle.mainBundle().releaseVersionNumber NSBundle.mainBundle().buildVersionNumber // or... NSBundle(URL: someURL)?.releaseVersionNumber NSBundle(URL: someURL)?.buildVersionNumber
原来的答案
I wanted to improve on some of the answers already posted. I wrote a class extension that can be added to your tool chain to handle this in a more logical fashion. extension NSBundle { class var applicationVersionNumber: String { if let version = NSBundle.mainBundle().infoDictionary?["CFBundleShortVersionString"] as? String { return version } return "Version Number Not Available" } class var applicationBuildNumber: String { if let build = NSBundle.mainBundle().infoDictionary?["CFBundleVersion"] as? String { return build } return "Build Number Not Available" } } So now you can access this easily by: let versionNumber = NSBundle.applicationVersionNumber
看过文档后,我认为以下内容更清晰:
let version =
NSBundle.mainBundle().objectForInfoDictionaryKey("CFBundleShortVersionString")
as? String
来源: 使用此方法优于其他访问方法,因为它在键可用时返回键的本地化值。