xcode NSURLConnection 错误代码 -1100

NSURLConnection Error Code -1100

提问by user1391152

I am trying to load content into UIWebView, and when testing in the simulator all I get is a white screen and the following error in the console:

我正在尝试将内容加载到 UIWebView 中，在模拟器中进行测试时，我得到的只是白屏和控制台中的以下错误：

NSURLConnection finished with error - code -1100  

Can anybody help? My current Swift Code is:

有人可以帮忙吗？我目前的 Swift 代码是：

class ViewController: UIViewController {  
    @IBOutlet weak var webView: UIWebView!  

    override func viewDidLoad() {  
        super.viewDidLoad()  

        webView.allowsInlineMediaPlayback = true;         
        webView.mediaPlaybackRequiresUserAction = false;  

        webView.loadRequest(URLRequest(url: URL(fileURLWithPath: Bundle.main.path(forResource: "www/index", ofType: "html")!)))  

        let statusBar = UIApplication.shared.value(forKeyPath: "statusBarWindow.statusBar") as? UIView  
        statusBar?.backgroundColor = UIColor.clear  

    }  
}  

Just to clarify, this code usual works for me, but I can't find anything online relating to error -1100. Many thanks.

澄清一下，这段代码通常对我有用，但我在网上找不到与错误 -1100 相关的任何内容。非常感谢。

回答by Yun CHEN

-1100means NSURLErrorFileDoesNotExist. And you are accessing a local file, print the URL's absoluteStringto check the path is good for that file.

-1100是指NSURLErrorFileDoesNotExist。并且您正在访问本地文件，打印 URLabsoluteString以检查路径是否适合该文件。

回答by ssowri1

For mine, The network didn't connected properly. Then I turned on my data connection after that I solved it.

对于我的，网络没有正确连接。然后我打开我的数据连接之后我解决了它。

回答by 9dan

Short description for all NSURLRequesterror codes: URL Loading System Error Codes

所有NSURLRequest错误代码的简短描述：URL 加载系统错误代码

• NSURLErrorUnknown

• NSURLErrorUnknown

Returned when the URL Loading system encounters an error that it cannot interpret.

当 URL 加载系统遇到无法解释的错误时返回。

• NSURLErrorCancelled

• 已取消 NSURL 错误

Returned when an asynchronous load is canceled.

取消异步加载时返回。

• NSURLErrorBadURL

• NSURLErrorBadURL

Returned when a URL is sufficiently malformed that a URL request cannot be initiated

当 URL 的格式严重到无法发起 URL 请求时返回

• NSURLErrorTimedOut

• NSURLErrorTimedOut

Returned when an asynchronous operation times out.

当异步操作超时时返回。

• NSURLErrorUnsupportedURL

• NSURLErrorUnsupportedURL

Returned when a properly formed URL cannot be handled by the framework.

当框架无法处理格式正确的 URL 时返回。

• NSURLErrorCannotFindHost

• NSURLErrorCannotFindHost

Returned when the host name for a URL cannot be resolved.

当无法解析 URL 的主机名时返回。

• NSURLErrorCannotConnectToHost

• NSURLErrorCannotConnectToHost

Returned when an attempt to connect to a host has failed.

当尝试连接到主机失败时返回。

• NSURLErrorDataLengthExceedsMaximum

• NSURLErrorDataLengthExceedsMaximum

Returned when the length of the resource data exceeds the maximum allowed.

当资源数据的长度超过允许的最大值时返回。

• NSURLErrorNetworkConnectionLost

• NSURLErrorNetworkConnectionLost

Returned when a client or server connection is severed in the middle of an in-progress load.

当客户端或服务器连接在正在进行的加载过程中被切断时返回。

• NSURLErrorDNSLookupFailed

• NSURLErrorDNSLookupFailed

See NSURLErrorCannotFindHost

见 NSURLErrorCannotFindHost

• NSURLErrorHTTPTooManyRedirects

• NSURLErrorHTTPTooManyRedirects

Returned when a redirect loop is detected or when the threshold for number of allowable redirects has been exceeded (currently 16).

当检测到重定向循环或超过允许重定向次数的阈值（当前为 16）时返回。

• NSURLErrorResourceUnavailable

• NSURLErrorResourceUnavailable

Returned when a requested resource cannot be retrieved.

当无法检索到请求的资源时返回。

• NSURLErrorNotConnectedToInternet

• NSURLErrorNotConnectedToInternet

Returned when a network resource was requested, but an internet connection is not established and cannot be established automatically, either through a lack of connectivity, or by the user's choice not to make a network connection automatically.

当请求网络资源但未建立 Internet 连接且无法自动建立 Internet 连接时返回，这可能是由于缺乏连接或用户选择不自动建立网络连接。

• NSURLErrorRedirectToNonExistentLocation

• NSURLErrorRedirectToNonExistentLocation

Returned when a redirect is specified by way of server response code, but the server does not accompany this code with a redirect URL.

当通过服务器响应代码指定重定向时返回，但服务器不将此代码与重定向 URL 一起使用。

• NSURLErrorBadServerResponse

• NSURLErrorBadServerResponse

Returned when the URL Loading system receives bad data from the server.

当 URL Loading 系统从服务器接收到错误数据时返回。

• NSURLErrorUserCancelledAuthentication

• NSURLErrorUserCancelledAuthentication

Returned when an asynchronous request for authentication is cancelled by the user.

当用户取消异步身份验证请求时返回。

• NSURLErrorUserAuthenticationRequired

• NSURLErrorUserAuthenticationRequired

Returned when authentication is required to access a resource.

当访问资源需要身份验证时返回。

• NSURLErrorZeroByteResource

• NSURLErrorZeroByteResource

Returned when a server reports that a URL has a non-zero content length, but terminates the network connection “gracefully” without sending any data.

当服务器报告 URL 的内容长度不为零时返回，但“优雅地”终止网络连接而不发送任何数据。

• NSURLErrorCannotDecodeRawData

• NSURLErrorCannotDecodeRawData

Returned when content data received during an NSURLConnection request cannot be decoded for a known content encoding.

当在 NSURLConnection 请求期间接收的内容数据无法为已知的内容编码进行解码时返回。

• NSURLErrorCannotDecodeContentData

• NSURLErrorCannotDecodeContentData

Returned when content data received during an NSURLConnection request has an unknown content encoding.

在 NSURLConnection 请求期间收到的内容数据具有未知的内容编码时返回。

• NSURLErrorCannotParseResponse

• NSURLErrorCannotParseResponse

Returned when a response to an NSURLConnection request cannot be parsed.

当无法解析对 NSURLConnection 请求的响应时返回。

• NSURLErrorInternationalRoamingOff

• NSURLErrorInternationalRoamingOff

Returned when a connection would require activating a data context while roaming, but international roaming is disabled.

当连接需要在漫游时激活数据上下文但禁用国际漫游时返回。

• NSURLErrorCallIsActive

• NSURLErrorCallIsActive

Returned when a connection is attempted while a phone call is active on a network that does not support simultaneous phone and data communication (EDGE or GPRS).

在不支持同时进行电话和数据通信（EDGE 或 GPRS）的网络上进行电话呼叫时尝试连接时返回。

• NSURLErrorDataNotAllowed

• NSURLErrorDataNotAllowed

Returned when the cellular network disallows a connection.

当蜂窝网络不允许连接时返回。

• NSURLErrorRequestBodyStreamExhausted

• NSURLErrorRequestBodyStreamExhausted

Returned when a body stream is needed but the client does not provide one. This impacts clients on iOS that send a POST request using a body stream but do not implement the NSURLConnection delegate method connection:needNewBodyStream.

当需要正文流但客户端不提供时返回。这会影响 iOS 上使用正文流发送 POST 请求但未实现 NSURLConnection 委托方法 connection:needNewBodyStream 的客户端。

• NSURLErrorFileDoesNotExist

• NSURLErrorFileDoesNotExist

Returned when a file does not exist.

当文件不存在时返回。

• NSURLErrorFileIsDirectory

• NSURLErrorFileIsDirectory

Returned when a request for an FTP file results in the server responding that the file is not a plain file, but a directory.

当对 FTP 文件的请求导致服务器响应该文件不是普通文件而是目录时返回。

• NSURLErrorNoPermissionsToReadFile

• NSURLErrorNoPermissionsToReadFile

Returned when a resource cannot be read due to insufficient permissions.

由于权限不足而无法读取资源时返回。

• NSURLErrorSecureConnectionFailed

• NSURLErrorSecureConnectionFailed

Returned when an attempt to establish a secure connection fails for reasons which cannot be expressed more specifically.

当尝试建立安全连接由于无法更具体表达的原因而失败时返回。

• NSURLErrorServerCertificateHasBadDate

• NSURLErrorServerCertificateHasBadDate

Returned when a server certificate has a date which indicates it has expired, or is not yet valid.

当服务器证书的日期表明它已过期或尚未有效时返回。

• NSURLErrorServerCertificateUntrusted

• NSURLErrorServerCertificateUntrusted

Returned when a server certificate is signed by a root server which is not trusted.

当服务器证书由不受信任的根服务器签名时返回。

• NSURLErrorServerCertificateHasUnknownRoot

• NSURLErrorServerCertificateHasUnknownRoot

Returned when a server certificate is not signed by any root server.

当服务器证书未由任何根服务器签名时返回。

• NSURLErrorServerCertificateNotYetValid

• NSURLErrorServerCertificateNotYetValid

Returned when a server certificate is not yet valid.

当服务器证书尚未有效时返回。

• NSURLErrorClientCertificateRejected

• NSURLErrorClientCertificateRejected

Returned when a server certificate is rejected.

当服务器证书被拒绝时返回。

• NSURLErrorClientCertificateRequired

• NSURLErrorClientCertificateRequired

Returned when a client certificate is required to authenticate an SSL connection during an NSURLConnection request.

在 NSURLConnection 请求期间需要客户端证书来验证 SSL 连接时返回。

• NSURLErrorCannotLoadFromNetwork

• NSURLErrorCannotLoadFromNetwork

Returned when a specific request to load an item only from the cache cannot be satisfied.

当无法满足仅从缓存加载项目的特定请求时返回。

• NSURLErrorCannotCreateFile

• NSURLErrorCannotCreateFile

Returned when NSURLDownload object was unable to create the downloaded file on disk due to a I/O failure.

当 NSURLDownload 对象由于 I/O 失败而无法在磁盘上创建下载的文件时返回。

• NSURLErrorCannotOpenFile

• NSURLErrorCannotOpenFile

Returned when NSURLDownload was unable to open the downloaded file on disk.

当 NSURLDownload 无法打开磁盘上下载的文件时返回。

• NSURLErrorCannotCloseFile

• NSURLErrorCannotCloseFile

Returned when NSURLDownload was unable to close the downloaded file on disk.

当 NSURLDownload 无法关闭磁盘上下载的文件时返回。

• NSURLErrorCannotWriteToFile

• NSURLErrorCannotWriteToFile

Returned when NSURLDownload was unable to write to the downloaded file on disk.

当 NSURLDownload 无法写入磁盘上下载的文件时返回。

• NSURLErrorCannotRemoveFile

• NSURLErrorCannotRemoveFile

Returned when NSURLDownload was unable to remove a downloaded file from disk.

当 NSURLDownload 无法从磁盘中删除下载的文件时返回。

• NSURLErrorCannotMoveFile

• NSURLErrorCannotMoveFile

Returned when NSURLDownload was unable to move a downloaded file on disk.

当 NSURLDownload 无法在磁盘上移动下载的文件时返回。

• NSURLErrorDownloadDecodingFailedMidStream

• NSURLErrorDownloadDecodingFailedMidStream

Returned when NSURLDownload failed to decode an encoded file during the download.

当 NSURLDownload 在下载过程中无法解码编码文件时返回。

• NSURLErrorDownloadDecodingFailedToComplete

• NSURLErrorDownloadDecodingFailedToComplete

Returned when NSURLDownload failed to decode an encoded file after downloading.

当 NSURLDownload 下载后无法解码编码文件时返回。

• NSURLErrorAppTransportSecurityRequiresSecureConnection

• NSURLErrorBackgroundSessionInUseByAnotherProcess

• NSURLErrorBackgroundSessionRequiresSharedContainer

• NSURLErrorBackgroundSessionWasDisconnected

• NSURLErrorFileOutsideSafeArea

• NSURLErrorAppTransportSecurityRequiresSecureConnection

• NSURLErrorBackgroundSessionInUseByAnotherProcess

• NSURLErrorBackgroundSessionRequiresSharedContainer

• NSURLErrorBackgroundSessionWasDisconnected

• NSURLErrorFileOutsideSafeArea