我们在浏览器访问https页面的时候的，会弹出：
我们接下来信任证书以及显示出来
遵循协议
~~~
@interface ViewController ()<NSURLConnectionDataDelegate>
~~~
interface：
~~~
@interface ViewController ()<NSURLConnectionDataDelegate>
/**
- 存储data数据
*/
@property(nonatomic,strong)NSMutableData *dataM;
/**
- 访问url链接
*/
@property(nonatomic,strong)NSURL *url;
@property(nonatomic,weak)IBOutlet UIWebView *webView;
@end
~~~
viewDidLoad:创建url以及发送请求
~~~
- (void)viewDidLoad {
[super viewDidLoad];
self.url = [NSURL URLWithString:@"https://mail.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:self.url];
//发送请求
[NSURLConnection connectionWithRequest:request delegate:self];
}
~~~
实现代理方法：
~~~
#pragma mark - NSURLSessionDataDelegate代理方法
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task
didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge
completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential * __nullable credential))completionHandler
{
NSLog(@"challenge = %@",challenge.protectionSpace.serverTrust);
//判断是否是信任服务器证书
if (challenge.protectionSpace.authenticationMethod ==NSURLAuthenticationMethodServerTrust)
{
//创建一个凭据对象
NSURLCredential *credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];
//告诉服务器客户端信任证书
[challenge.sender useCredential:credential forAuthenticationChallenge:challenge];
}
}
/**
* 接收到服务器返回的数据时调用
*/
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
NSLog(@"接收到的数据%zd",data.length);
[self.dataM appendData:data];
}
/**
* 请求完毕
*/
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSString *html = [[NSString alloc]initWithData:self.dataM encoding:NSUTF8StringEncoding];
NSLog(@"请求完毕");
[self.webView loadHTMLString:html baseURL:self.url];
}
~~~
懒加载：
~~~
- (NSMutableData *)dataM
{
if (_dataM == nil)
{
_dataM = [[NSMutableData alloc]init];
}
return _dataM;
}
~~~
至此，我们已经实现了https数据的展示：
**注意：**
NSURLSession/NSURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9843) 原因：没有信任服务器证书
在下面这个方法中：
~~~
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task
didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge
completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential * __nullable credential))completionHandler()
~~~
我们通过protectionSpace.authenticationMethod判断是否信任服务器证书
- NSURLSessionAuthChallengeUseCredential = 0, 使用凭据 ，信任服务器证书
- NSURLSessionAuthChallengePerformDefaultHandling = 1, 默认处理，忽略服务器证书
- NSURLSessionAuthChallengeCancelAuthenticationChallenge = 2, 整个请求被取消 凭据被忽略
- NSURLSessionAuthChallengeRejectProtectionSpace = 3, 本次拒绝，下次重试
