获取应用程序和设备操作系统版本号 - Android iOS - PCL
下面的例子将收集设备的操作系统版本号和输入到应用程序的版本(这是在每个项目的性质来定义) 版本名称在 Android 和版本 iOS 上。
首先在 PCL 项目中创建一个界面:
public interface INativeHelper {
/// <summary>
/// On iOS, gets the <c>CFBundleVersion</c> number and on Android, gets the <c>PackageInfo</c>'s <c>VersionName</c>, both of which are specified in their respective project properties.
/// </summary>
/// <returns><c>string</c>, containing the build number.</returns>
string GetAppVersion();
/// <summary>
/// On iOS, gets the <c>UIDevice.CurrentDevice.SystemVersion</c> number and on Android, gets the <c>Build.VERSION.Release</c>.
/// </summary>
/// <returns><c>string</c>, containing the OS version number.</returns>
string GetOsVersion();
}
现在我们在 Android 和 iOS 项目中实现界面。
安卓:
[assembly: Dependency(typeof(NativeHelper_Android))]
namespace YourNamespace.Droid{
public class NativeHelper_Android : INativeHelper {
/// <summary>
/// See interface summary.
/// </summary>
public string GetAppVersion() {
Context context = Forms.Context;
return context.PackageManager.GetPackageInfo(context.PackageName, 0).VersionName;
}
/// <summary>
/// See interface summary.
/// </summary>
public string GetOsVersion() { return Build.VERSION.Release; }
}
}
iOS 版:
[assembly: Dependency(typeof(NativeHelper_iOS))]
namespace YourNamespace.iOS {
public class NativeHelper_iOS : INativeHelper {
/// <summary>
/// See interface summary.
/// </summary>
public string GetAppVersion() { return Foundation.NSBundle.MainBundle.InfoDictionary[new Foundation.NSString("CFBundleVersion")].ToString(); }
/// <summary>
/// See interface summary.
/// </summary>
public string GetOsVersion() { return UIDevice.CurrentDevice.SystemVersion; }
}
}
现在在方法中使用代码:
public string GetOsAndAppVersion {
INativeHelper helper = DependencyService.Get<INativeHelper>();
if(helper != null) {
string osVersion = helper.GetOsVersion();
string appVersion = helper.GetBuildNumber()
}
}