iOS UIWebView 加载自签名证书Https网页

摘要: 在上一篇文章中主要讲解了,如何使用AFN验证自签名证书并加载Https资源数据.但是对于自签...

目前源码已经上传至Githup需要参考源码的可以点击这里:https://github.com/AustinKuture/UIWebViewSelfSignedHttps.git

使用UIWebView 加载页面时,我们的常用方法大都是这样的(或者使用WKWebView):

UIWebView *webView = [UIWebView alloc]initWithFrame:CGRectMake(0,0,200,200);
[webView loadRequest:[NSURLRequest requestWithURL:url]];
[self.view addSubView:webView];

有时我们也会用UIWe不View加载网页时设置Cookie,在这里我们使用NSHTTPCookieStorage实现管理共享的cookie,并将存储一个共享实例,这些Cookie在所有应用程序之间是共享的,并且是跨进程同步保存的,通过对Cookie设置可以让我们像电脑浏览网页一样,灵活的对Cookie信息进行设置和清除,使应用端加载网页信息时更加的方便,Cookie的设置与清除如下所示:

//设置Cookie
NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];
[cookieProperties setObject:@"cookie_user" forKey:NSHTTPCookieName];
[cookieProperties setObject:uid forKey:NSHTTPCookieValue];
[cookieProperties setObject:@"xxx.xxx.com" forKey:NSHTTPCookieDomain];
[cookieProperties setObject:@"/" forKey:NSHTTPCookiePath];
[cookieProperties setObject:@"0" forKey:NSHTTPCookieVersion];
[cookieProperties setObject:[[NSDate date] dateByAddingTimeInterval:2629743] forKey:NSHTTPCookieExpires];

NSHTTPCookie *cookieuser = [NSHTTPCookie cookieProperties];
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookieuser];

NSURL *url = [NSURL URLWithString:url];
NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:60];
[webView loadRequest:request];

//清除Cookie
- (void)deleteCookie{
NSHTTPCookie *cookie;

NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];

NSArray *cookieAry = [cookieJar cookiesForURL: [NSURL URLWithString: url]];

for (cookie in cookieAry) {

[cookieJar deleteCookie: cookie];

}
}

虽然UIWebView使用较为灵活,几乎与电脑端加载网页一样的方便,但是由于种种原因iOS的UIWebView在使用自签名证书加载网页时仍然不能正常的加载数据并显示,对此我们可以使用NSURLConnection和UIWebView的代理方法,实现对自签名证书在一定情况下,自动在程序后台进行验证与自动信任,从而加载出我们所想要显示的网页,具体使用步骤如下:

1,创建一个继承自UIWebView的类AKWebView,在.h文件中添加两个方法,一个是初始化类方法(单例),另一个是WebView的实现方法:

#import <UIKit/UIKit.h>

@interface AKWebView : UIWebView

+(instancetype)shareWebView;
- (void)webViewWithLoadRequestWithURL:(NSURL *)url Fram:(CGRect)fram;

@end

2,在.m文件中,首先添加我们所要用到的代理协议,并创建属性:

#import "AKWebView.h"

@interface AKWebView ()<UIWebViewDelegate,NSURLConnectionDataDelegate>

@property (nonatomic,strong) NSURLConnection *urlConnection;
@property (nonatomic,strong) NSURLRequest *requestW;
@property (nonatomic) SSLAuthenticate authenticated;

@end

3,实现类初始化方法shareWebView:

@implementation AKWebView
3ff0

+(instancetype)shareWebView{
static dispatch_once_t onece = 0;
static AKWebView *webView = nil;
dispatch_once(&onece, ^(void){
webView = [[self alloc]init];
});
return webView;
}

4,实现webView的实例化方法,在这里主要是为了配置WebVeiw的大小,布局,添加代理,以及Request:

#pragma mark ***UIWebView 加载方法***
- (void)webViewWithLoadRequestWithURL:(NSURL *)url Fram:(CGRect)fram{

self.frame = fram;
self.delegate = self;
_requestW = [NSURLRequest requestWithURL:url];
[self loadRequest:_requestW];
}

5,实现各代理方法:

#pragma mark ***UIWebView 代理方法***
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{

NSLog(@"开始加载: %@ 授权:%d", [[request URL] absoluteString], _authenticated);

if (!_authenticated) {
_authenticated = kNeverAuthenticate;

_urlConnection = [[NSURLConnection alloc] initWithRequest:_requestW delegate:self];

[_urlConnection start];

return NO;
}

return YES;
}

#pragma mark ***NURLConnection 代理方法***
- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge{
NSLog(@"WebController 已经得到授权正在请求 NSURLConnection");

if ([challenge previousFailureCount] == 0){
_authenticated = kTryAuthenticate;

NSURLCredential *credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];

[challenge.sender useCredential:credential forAuthenticationChallenge:challenge];

} else{
[[challenge sender] cancelAuthenticationChallenge:challenge];
}
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
NSLog(@"WebController 已经收到响应并通过了 NSURLConnection请求");

_authenticated = kTryAuthenticate;
[self loadRequest:_requestW];
[_urlConnection cancel];
}

- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace{

return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
}

@end

6,使用方法,在使用时候先导入AKWebView的头文件,在想要加载自签名证书https网页的控制器中,创建AKwebView并实现其方法,添加URL,及Fram大小即可:

AKWebView *webView = [AKWebView shareWebView];
[webView webViewWithLoadRequestWithURL:url Fram:CGRectMake(0, 0, 500, 500)];
[self.view addSubview:webView];

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