ios https请求处理方式1：信任一切证书

处理方法

1：使用异步请求方式

2：证书信任的委托这样处理

-(BOOL)connectionShouldUseCredentialStorage:(NSURLConnection *)connection{
    return true;
}
- (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge{
    NSLog(@"didReceiveAuthenticationChallenge %@ %zd", [[challenge protectionSpace] authenticationMethod], (ssize_t) [challenge previousFailureCount]);
    if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]){
        [[challenge sender]  useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
        [[challenge sender]  continueWithoutCredentialForAuthenticationChallenge: challenge];
    }
}

- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace{
       return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
}

完整示例代码

UIViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<NSURLConnectionDataDelegate>

@end

UIViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //string 转 url编码
    NSString *urlString = @"https://api.github.com/users/coolnameismy";
    NSURL *url = [NSURL URLWithString:[urlString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]]];

    
    NSURLRequest *request = [[NSURLRequest alloc]initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];
    NSURLConnectionDataDelegate *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];
    
    [connection start];
}

//请求失败
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
    NSLog(@"=================didFailWithError=================");
    NSLog(@"error:%@",error);
}

//重定向
- (nullable NSURLRequest *)connection:(NSURLConnection *)connection willSendRequest:(NSURLRequest *)request redirectResponse:(nullable NSURLResponse *)response{
    NSLog(@"=================request redirectResponse=================");
    NSLog(@"request:%@",request);
    return request;
}

//接收响应
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
    NSLog(@"=================didReceiveResponse=================");
    NSHTTPURLResponse *resp = (NSHTTPURLResponse *)response;
    NSLog(@"response:%@",resp);
}

//接收响应
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
    NSLog(@"=================didReceiveData=================");
    NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
    NSLog(@"data:%@",dic);
}

//- (nullable NSInputStream *)connection:(NSURLConnection *)connection needNewBodyStream:(NSURLRequest *)request{
//    
//}

//上传数据委托，用于显示上传进度
- (void)connection:(NSURLConnection *)connection   didSendBodyData:(NSInteger)bytesWritten
 totalBytesWritten:(NSInteger)totalBytesWritten
totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite{
    NSLog(@"=================totalBytesWritten=================");
}

//- (nullable NSCachedURLResponse *)connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse *)cachedResponse{
//    
//}

//完成请求
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{
    NSLog(@"=================connectionDidFinishLoading=================");
}


#pragma mark -https认证
-(BOOL)connectionShouldUseCredentialStorage:(NSURLConnection *)connection{
    return true;
}
- (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge{
    NSLog(@"didReceiveAuthenticationChallenge %@ %zd", [[challenge protectionSpace] authenticationMethod], (ssize_t) [challenge previousFailureCount]);
    if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]){
        [[challenge sender]  useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
        [[challenge sender]  continueWithoutCredentialForAuthenticationChallenge: challenge];
    }
}

- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace{
       return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

参考文章

-iOS: HTTPS 与自签名证书
-iOS - HTTPS
-iOS安全系列之一：HTTPS
-iOS安全系列之二：HTTPS进阶
-Making HTTP and HTTPS Requests