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引言

• -1005（请求超时）
• -999 cancelled的解决方案:允许不进行SSL证书验证, 来规避SSL证书过期导致的请求报错
• Dictionary换成ConCurrentDictionary，线程安全

I、NSURLSessionTask finished with error - code: -1005（请求超时）

解决方法，修改超时时间

-    request.timeoutInterval = 5.0;
+    request.timeoutInterval = 30.0;

II、 Error Code=-999 cancelled的解决方案

• iOS HTTPS请求Error Code=-999 cancelled的解决方案:【允许不进行SSL证书验证, 来规避SSL证书过期导致的请求报错】

针对 load failed with error Error Domain=NSURLErrorDomain Code=-999 "已取消"错误的解决方案的解决方案：

• 允许不进行SSL证书验证, 来规避SSL证书过期导致的请求报错
• 及时将有效的证书部署于所使用的环境中

2.1 、原因分析

SSL证书失效了, 导致此问题。

• evaluateServerTrust:forDomain:

/**
 Whether or not the specified server trust should be accepted, based on the security policy.

 This method should be used when responding to an authentication challenge from a server.

 @param serverTrust The X.509 certificate trust of the server.
 @param domain The domain of serverTrust. If `nil`, the domain will not be validated.

 @return Whether or not to trust the server.
 */
- (BOOL)evaluateServerTrust:(SecTrustRef)serverTrust
                  forDomain:(nullable NSString *)domain;

证书无效后, 上面方法返回NO, 从而执行

                disposition = NSURLSessionAuthChallengeCancelAuthenticationChallenge;

最终导致, 当前的请求被cancel。

2.2、解决方案: 设置securityPolicy允许不进行SSL证书验证

• 设置securityPolicy

AFSecurityPolicy *securityPolicy = [AFSecurityPolicy defaultPolicy];
securityPolicy.validatesDomainName = NO;
securityPolicy.allowInvalidCertificates = YES;
manager.securityPolicy = securityPolicy;

III、Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer corre

• 错误信息：

{
	message = Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct.;
	data = <null>;
	code = 500;
}

• 解决：具体的解决方案取决于代码 例如： 接口对应服务端侧使用的是.net

Dictionary换成ConCurrentDictionary，线程安全

see also

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