話不多說，直入正題。

先說node.js端

證書是我在騰訊云搞得，下載下來即可。上代碼
node用的是express模塊

var app = require('express')();
var fs = require('fs');
var http = require('http');
var https = require('https');
var privateKey  = fs.readFileSync('3_sallen.cc.key');
var certificate = fs.readFileSync('2_sallen.cc.crt');
var credentials = {key: privateKey, cert: certificate};

var httpServer = http.createServer(app);
var httpsServer = https.createServer(credentials, app);
var PORT = 8000;
var SSLPORT = 8001;

httpServer.listen(PORT, function() {
    console.log('HTTP Server is running on: http://localhost:%s', PORT);
});
httpsServer.listen(SSLPORT, function() {
    console.log('HTTPS Server is running on: https://localhost:%s', SSLPORT);
});

app.get('/user', function(req, res) {
    if(req.protocol === 'https') {
        res.status(200).send('Welcome to sallen');
    }
    else {
        res.status(200).send('Welcome!');
    }
});

好了 下面是ios

后臺給的證書crt的話 需要轉(zhuǎn)換成cer

進到證書路徑，執(zhí)行下面語句 openssl x509 -in 你的證書.crt -out 你的證書.cer -outform der 這樣你就可以得到cer類型的證書了
sallen是我轉(zhuǎn)換的證書。

我用的是免費證書 所以在ios訪問時以下錯誤，

error.png

所以需要在afnetworking里面注釋掉下面

zhushi.png

下面ios代碼附上

   NSString *url = @"your address";
   
   NSString *cerPath = [[NSBundle mainBundle] pathForResource:@"sallen" ofType:@"cer"];
   NSData *certData =[NSData dataWithContentsOfFile:cerPath];
   NSSet *certSet = [[NSSet alloc] initWithObjects:certData, nil];
  
   
   AFSecurityPolicy *securityPolicy = [AFSecurityPolicy defaultPolicy];
   // 設(shè)置證書
   [securityPolicy setPinnedCertificates:certSet];
   securityPolicy.allowInvalidCertificates = YES;
   securityPolicy.validatesDomainName = YES;
   // 初始化請求的manager對象
   AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
   manager.securityPolicy = securityPolicy;
   manager.responseSerializer = [AFHTTPResponseSerializer serializer];
 
   
   [manager GET:url parameters:nil progress:^(NSProgress * progress){
   } success:^(NSURLSessionDataTask *task, id responseObject) {
       NSArray * array = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableLeaves error:nil];
       NSLog(@"OK === %@",array);
   } failure:^(NSURLSessionDataTask *task, NSError *error) {
       NSLog(@"error ==%@",error.description);
   }];
   ```