Ssl 具有自签名证书的iOS 11 HTTPS网络请求失败

出于测试目的，项目使用自签名证书，作为网络请求的捆绑资源加载

它在Xcode8+iOS10设备和模拟器上运行良好

但是，在Xcode9和iOS 11上，提示错误如下：

----------------
<APIClient.swift> call [#77]
Error Domain=NSURLErrorDomain Code=-1200 "An SSL error has occurred and a secure connection to the server cannot be made." UserInfo={NSURLErrorFailingURLPeerTrustErrorKey=<SecTrustRef: 0x1c0111f70>, NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?, _kCFStreamErrorDomainKey=3, _kCFStreamErrorCodeKey=-9802, NSErrorPeerCertificateChainKey=(
    "<cert(0x1070fb600) s: *.ABC i:ABC>",
    "<cert(0x1070fce00) s:ABC i: 2048 offline root>",
    "<cert(0x1070fd600) s: 2048 offline root i: 2048 offline root>"
), NSUnderlyingError=0x1c465e180 {Error Domain=kCFErrorDomainCFNetwork Code=-1200 "(null)" UserInfo={_kCFStreamPropertySSLClientCertificateState=0, kCFStreamPropertySSLPeerTrust=<SecTrustRef: 0x1c0111f70>, _kCFNetworkCFStreamSSLErrorOriginalValue=-9802, _kCFStreamErrorDomainKey=3, _kCFStreamErrorCodeKey=-9802, kCFStreamPropertySSLPeerCertificates=(
    "<cert(0x1070fb600) s: *.ABC i:ABC>",
    "<cert(0x1070fce00) s:ABC i: 2048 offline root>",
    "<cert(0x1070fd600) s: 2048 offline root i: 2048 offline root>"
)}}, NSLocalizedDescription=An SSL error has occurred and a secure connection to the server cannot be made., NSErrorFailingURLKey=https:/
----------------

----------------
打电话[77]
Error Domain=NSURERRORDOMAIN Code=-1200“发生SSL错误，无法与服务器建立安全连接。”UserInfo={NSURERRORFAILLINGURLPERTRETERRORCERRORKEY=，NSLocalizedRecoverysSuggestion=是否仍要连接到服务器？，kCFStreamErrorDomainKey=3，kCFStreamErrorCodeKey=-9802，NSERROPERCertificateChainKey=-9802=(
"",
"",
""
)，NSUnderlyingError=0x1c465e180{Error Domain=KCFerrorDomain=KCF网络代码=-1200“（null）”用户信息={{kCFStreamPropertySSLClientCertificateState=0，kCFStreamPropertySSLPeerTrust=，KCFnetworkCfStreamsLerrorOriginalValue=-9802，kCFStreamErrorDomainKey=3，kCFStreamErrorCodeKey=-9802，kCFStreamPropertySSLPeerCertificates=(
"",
"",
""
)}}，NSLocalizedDescription=发生SSL错误，无法与服务器建立安全连接。NSErrorFailingURLKey=https:/
----------------

可以通过添加以下内容来解决此问题：

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>

NSAppTransportSecurity
NSAllowsArbitraryLoads

我想知道这是一个模拟器错误，还是安全策略被更改了，比如在iOS 11上完全禁止自签名证书？ 如果是，是否有链接/文档参考