1.设置代理
NSURLSession *sesson = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[[NSOperationQueue alloc]init]];
2.在代理方法中实现对证书的操作
方法一：这是在开发者足够信任后端的安全的情况下做的，比如调个接口，这样做的结果就是忽略证书的验证，直接信任。
- (void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential * _Nullable))completionHandler{
if([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]){//服务器信任证书
NSURLCredential *credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];//服务器信任证书
if(completionHandler)
completionHandler(NSURLSessionAuthChallengeUseCredential,credential);
}
}
方法二：可以把证书加到工程中，然后https访问时在代理方法中进行证书的验证
- (void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential * _Nullable))completionHandler{
SecTrustRef servertrust = challenge.protectionSpace.serverTrust;
SecCertificateRef certi= SecTrustGetCertificateAtIndex(servertrust, 0);
NSData *certidata = CFBridgingRelease(CFBridgingRetain(CFBridgingRelease(SecCertificateCopyData(certi))));
NSString *path = [[NSBundle mainBundle] pathForResource:@"https" ofType:@"cer"];
NSData *localCertiData = [NSData dataWithContentsOfFile:path];
if ([certidata isEqualToData:localCertiData]) {
NSURLCredential *credential = [[NSURLCredential alloc] initWithTrust:servertrust];
[challenge.sender useCredential:credential forAuthenticationChallenge:challenge];
completionHandler(NSURLSessionAuthChallengeUseCredential, credential);
NSLog(@"服务端证书认证通过");
}else {
completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);
NSLog(@"服务端认证失败");
}
}