UIWebView加载https网页

//
//  ViewController.m
//  02-HTTPS
//
//  Created by xiaomage on 15/8/25.
//  Copyright (c) 2015年 xiaomage. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()<NSURLConnectionDelegate, UIWebViewDelegate>
{
NSURLRequest *_request;
}
@property (weak, nonatomic) IBOutlet UIWebView *webView;

@end

@implementation ViewController

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{

//  NSString *str = [@"http://www.baidu.com" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSString *str = [@"https://kyfw.12306.cn/otn/leftTicket/init" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:str];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
_request = request;

if ([str hasPrefix:@"https://"]) { // https请求先发送connection请求,就会安装证书
NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self];
[connection start];
NSLog(@"https请求");
}else{  // http请求直接加载
[self.webView loadRequest:request];
}
}
#pragma mark - NSURLConnectionDelegate 加载https网页,需要实现代理下面两个方法

/**
*  安装证书
*/
-(void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
[challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
}
[challenge.sender continueWithoutCredentialForAuthenticationChallenge:challenge];
}

/**
*  安装证书成功之后再加载https网页
*/
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)pResponse {

self.webView.scalesPageToFit = YES;
[self.webView loadRequest:_request];
}

/*
// 另一种方法加载https网页
- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace {
return YES;
}

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
[challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
[self.webView loadRequest:_request];
}
*/

#pragma mark - UIWebViewDelegate
/*
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{

NSLog(@"%@", request.URL);
return YES;
}
- (void)webViewDidStartLoad:(UIWebView *)webView
{

}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{

}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(nullable NSError *)error
{
}
*/
@end