相关疑难解决方法(0)

三者之间有什么区别(标记为评论):

MultiThreadedHttpConnectionManager connManag =  new MultiThreadedHttpConnectionManager();
HttpConnectionManagerParams managParams = connManag.getParams();

managParams.setConnectionTimeout(connectiontimeout); // 1
managParams.setSoTimeout(sotimeout); //2

HttpMethodBase baseMethod = null;

try {
  HttpClient client = new HttpClient(connManag);
  client.getParams().setParameter("http.connection-manager.timeout", poolTimeout); //3

  baseMethod = new GetMethod(…);
  int statusCode = client.executeMethod(…);

  …
}
catch (ConnectTimeoutException cte ){
  //Took too long to connect to remote host
}
catch (SocketTimeoutException ste){
  //Remote host didn’t respond in time
}
catch (Exception se){
  //Some other error occurred
}
finally {
  if (baseMethod != null)
    baseMethod.releaseConnection();
}

1. setConnectionTimeout …

我在Xcode 8中将我的(macOS)项目转换为Swift 3,并且我使用swift类中实现的几个委托方法得到以下警告:

Instance method 'someMethod' nearly matches optional requirement of protocol 'protocolName'

我得到这个好NSApplicationDelegate方法,如applicationDidFinishLaunching和applicationDidBecomeActive:

但也适用于tableViewSelectionDidChange:

我使用代码完成来插入方法签名,并尝试从SDK标头中复制它们以排除拼写错误.警告不会消失,并且永远不会调用这些方法.

我在这里错过了什么？

我在 iOS 12 的 swift 应用程序中使用适用于 iOS 的 AWS 开发工具包。我的应用程序必须列出 AWS S3 存储桶中的文件并下载其中的一些文件。列表文件操作运行良好，我成功地控制了其超时。我没有成功地完成下载任务。我的代码如下：

let credentialProvider = AWSCognitoCredentialsProvider(regionType: AWSRegionType.USEast1, identityPoolId: "<pool-id>")
let configuration = AWSServiceConfiguration(region: AWSRegionType.APSoutheast2, credentialsProvider: credentialProvider)

configuration?.timeoutIntervalForRequest = 30.0
configuration?.timeoutIntervalForResource = 86400


let transferUtilityConfiguration = AWSS3TransferUtilityConfiguration.init()

transferUtilityConfiguration.timeoutIntervalForResource = 86400
transferUtilityConfiguration.retryLimit = 1

AWSS3TransferUtility.register(with: configuration!, transferUtilityConfiguration: transferUtilityConfiguration, forKey: "com.mykey")

transferUtility = AWSS3TransferUtility.s3TransferUtility(forKey: "com.mykey")


let bucket = "com.mybucket"


transferUtility.configuration.maxRetryCount = 1

let urlForSavingFile = URL.init(fileURLWithPath: "")


transferUtility.download(to: urlForSavingFile, bucket: bucket, key: self.latestFileOnServer.key, expression: expression, completionHandler: self.completionHandler).continueWith { (task) -> …