小编Bla*_*ock的帖子

在 Java 中，我尝试使用以下代码将 AWS SNS 消息发布到特定的 ARN 端点：

import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.sns.AmazonSNS;
import com.amazonaws.services.sns.AmazonSNSClient;
import com.amazonaws.services.sns.model.PublishRequest;
import com.amazonaws.services.sns.model.PublishResult;

...

AmazonSNS snsClient = new AmazonSNSClient(new BasicAWSCredentials(System.getenv("AWS_KEY"), System.getenv("AWS_SECRET")));

snsClient.setRegion(Region.getRegion(Regions.US_EAST_1));

String message = "{\"APNS_SANDBOX\":\"{\\\"aps\\\":{\\\"type\\\":\\\"XXX\\\",\\\"email\\\":\\\"XXX@gmail.com\\\",\\\"alert\\\":\\\"some alert\\\"}}\"}";

PublishResult pr = snsClient.publish(new PublishRequest("arn:aws:sns:us-east-1:XXX:endpoint/APNS_SANDBOX/XXX/XXX-XXX-XXX-XXX", message));

我一直收到以下错误消息：

Invalid parameter: Topic Name (Service: AmazonSNS; Status Code: 400; Error Code: InvalidParameter; Request ID: XXX

对此有什么想法吗？

我可以毫无问题地从 SNS 控制台发布到 ARN 端点，并且我尝试了不同的消息变体

我在 SwiftUI 视图中使用 switch 语句：

struct OnOffSwitchView: View {
    
    @ObservedObject var vm = ViewModel()
    
    var body: some View {
        switch vm.state {
        case .on:
            OnView(vm: vm)
        case .off:
            OffView(vm: vm)
        }
    }
}

@MainActor class ViewModel: ObservableObject {
    @Published var state: State = .on

    enum State {
        case on
        case off
    }
}

其中子视图正在更改 ViewModel 状态（打开和关闭相同），以便切换条件更新，呈现新视图：

struct OnView: View {
    
    @ObservedObject var vm: ViewModel
    
    var body: some View {
        VStack {
            Text("Welcome to On")
            Button { vm.state = .off } …