什么是NSString stringWithFormat in Xamarin.iOS

Question

我正在使用Azure通知集线器发送通知。我希望这些通知是多语种的，但我找不到相当于

NSString* jsontemplate= [NSString stringWithFormat:@"{\"aps\":
{\"alert\":\"$(News_%@)\"},\"inAppMessage\":\"$(News_%@)\"}",
localeString, localeString];

在函数中使用

Hub.RegisterTemplateAsync(deviceToken,name,jsontemplate,expirytemplate,tags, 
(errorCallback) => {
  if (errorCallback != null)
    Console.WriteLine("RegisterNativeAsync error: " +  errorCallback.ToString());                });

它将取代下面的代码片段中的函数Hub.RegisterNativeAsync，它适用于简单通知。

public override void RegisteredForRemoteNotifications(UIApplication     application, NSData deviceToken)
    {
        Hub = new SBNotificationHub(TnOConstants.AzureListenConnectionString, TnOConstants.AzureNotificationHubName);

        Hub.UnregisterAllAsync (deviceToken, (error) => {
            if (error != null)
            {
                Console.WriteLine("Error calling Unregister: {0}", error.ToString());
                return;
            }

            string[] tag = new string[]{"tnoios", "ios-"+ appVersion.ToString()};

            NSSet tags = new NSSet(tag);
            Hub.RegisterNativeAsync(deviceToken, tags, (errorCallback) => {
                if (errorCallback != null)
                    Console.WriteLine("RegisterNativeAsync error: " + errorCallback.ToString());
            });
        });
    }

我正在学习本教程https://azure.microsoft.com/en-us/documentation/articles/notification-hubs-ios-send-localized-breaking-news/

Answer 1

最后，我将String.Format()作为与上述phraze的NSString stringWithFormat等效的模板使用如下：

string template = String.Format(@"{""aps"":{""alert"":""$({0})""}}", localeString);