Swift 查找completionHandler的声明
我想调试Swift 2.0 Alamofire库中的SSL问题。我正在使用自定义Alamofire管理器和自定义ServerTrustPolicy设置,如下所示:Swift 查找completionHandler的声明,swift,closures,swift2,alamofire,Swift,Closures,Swift2,Alamofire,我想调试Swift 2.0 Alamofire库中的SSL问题。我正在使用自定义Alamofire管理器和自定义ServerTrustPolicy设置,如下所示: static let manager: Manager = { let serverTrustPolicies: [String: ServerTrustPolicy] = [ "localhost": .PinCertificates( certificates: ServerTrus
static let manager: Manager = {
let serverTrustPolicies: [String: ServerTrustPolicy] = [
"localhost": .PinCertificates(
certificates: ServerTrustPolicy.certificatesInBundle(),
validateCertificateChain: false,
validateHost: false
)
// "localhost": .DisableEvaluation
]
let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
configuration.HTTPAdditionalHeaders = Alamofire.Manager.defaultHTTPHeaders
return Alamofire.Manager(configuration: configuration,
serverTrustPolicyManager: ServerTrustPolicyManager(policies: serverTrustPolicies))
}()
我尝试了.PinCertificates和.DisableEvaluation。两人都给了我同样的错误
Error Domain=NSURLErrorDomain Code=-1200 "An SSL error has occurred and a secure connection to the server cannot be made."
UserInfo={
NSURLErrorFailingURLPeerTrustErrorKey=<SecTrustRef: 0x60c00004d980>,
NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?,
_kCFStreamErrorDomainKey=3,
_kCFStreamErrorCodeKey=-9802,
NSErrorPeerCertificateChainKey=<CFArray 0x6060001498a0 [0x10bb3c7b0]>{
type = immutable, count = 1, values = (
0 : <cert(0x61600006ed80) s: localhost i: localhost>
)},
NSUnderlyingError=0x6040000ad750 {
Error Domain=kCFErrorDomainCFNetwork Code=-1200 "(null)"
UserInfo={
_kCFStreamPropertySSLClientCertificateState=0,
kCFStreamPropertySSLPeerTrust=<SecTrustRef: 0x60c00004d980>,
_kCFNetworkCFStreamSSLErrorOriginalValue=-9802,
_kCFStreamErrorDomainKey=3,
_kCFStreamErrorCodeKey=-9802,
kCFStreamPropertySSLPeerCertificates=<CFArray 0x6060001498a0 [0x10bb3c7b0]>{
type = immutable, count = 1, values = (
0 : <cert(0x61600006ed80) s: localhost i: localhost>
)}
}
},
NSLocalizedDescription=An SSL error has occurred and a secure connection to the server cannot be made.,
NSErrorFailingURLKey=https://localhost:3000/auth/requestToken?auth_appId=d018ccd505db2cb1d5aacabb03fc2f3a,
NSErrorFailingURLStringKey=https://localhost:3000/auth/requestToken?auth_appId=d018ccd505db2cb1d5aacabb03fc2f3a,
NSErrorClientCertificateStateKey=0
}
我将其缩小到一个方法,从中调用completionHandler。在调用闭包之前,一切都很好,所以我想知道这个completionHandler实际上做了什么
public func URLSession(
session: NSURLSession,
didReceiveChallenge challenge: NSURLAuthenticationChallenge,
completionHandler: ((NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void))
{
// some other stuff but
// everything fine so far
completionHandler(disposition, credential)
}
我认为URLSession方法是从调度队列或类似的地方调用的
因此,我的问题是:如何找到作为completionHandler参数传递给URLSession方法的闭包?-我假设您这里的问题不是这个特定的方法,而是completionHandler在Swift中的工作方式
-这里的completionHandler是一个闭包,它反过来充当回调函数
-在Swift中,回调由闭包和委托处理
-让我用一个小例子来澄清这个困惑
问题:
假设我有一个方法要调用,所以我将调用该方法,在得到响应后,我需要在屏幕或控制台上显示结果
解决方案:
要调用的方法:
内部函数sumUpvalOne:Int,valTwo:Int,completionHandler:sum:Int->Void
{
让加法=valOne+valTwo
completionHandlersum:添加
}
呼叫代码:
总结{
}
-调用summp方法将完成两个整数相加的工作,然后将总和返回到completionHandler中,并将其公开给调用者。您应该能够进入闭包。或者只是检查这个方法在哪里被调用。你的问题不是很清楚。您是否使用自定义服务器信任策略?默认情况下,Alamofire使用苹果的默认服务器信任评估。如果你能说得更具体一点,帮助会容易得多。我用更多信息更新了我的问题:
public func URLSession(
session: NSURLSession,
didReceiveChallenge challenge: NSURLAuthenticationChallenge,
completionHandler: ((NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void))
{
// some other stuff but
// everything fine so far
completionHandler(disposition, credential)
}
(sum) -> Void in
print(sum) // OR print it in display