关于iOS网页UIWebview的http请求替换成https请求，涉及JS交互

网上应该有很多相关的解决办法，这种是调用官方的API， 所以从http直接转https会容易点，而且要修改的地方不多，只需实现以下几个代理方法就可以了，把返回的NSData类型数据 encoding 一下，然后 loadHTMLString 就行了，不多说，直接上代码先：

@interface ViewController () <UIWebViewDelegate,NSURLConnectionDelegate,NSURLConnectionDataDelegate> {
    UIWebView *webView;
    NSURLConnection *connenction;
    NSMutableData *mutableData;
}
@end

@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
    webView.delegate = self;
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.baidu.com"]];
    [webView loadRequest:request];
    [self.view addSubview:webView];
    mutableData = [NSMutableData data];
}

 // 相关代理方法
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    if ([request.URL.scheme isEqualToString:@"https"]) {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
        connenction = [[NSURLConnection alloc] initWithRequest:request delegate:self];
        [connenction start];
#pragma clang diagnostic pop
        return NO;
    }
    return YES;
}

- (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
    // 判断是否是信任服务器证书
    if ([challenge.protectionSpace.authenticationMethod isEqualToString: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];
    } else {
        if ([challenge previousFailureCount] == 0) {
        　　 [[challenge sender] continueWithoutCredentialForAuthenticationChallenge:challenge];
        } else {
            [[challenge sender] continueWithoutCredentialForAuthenticationChallenge:challenge];
        }
    }
}

 - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
    NSLog(@"response %@",response);
}

 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [mutableData appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    NSString *html = [[NSString alloc] initWithData:[mutableData copy] encoding:NSUTF8StringEncoding];
    [webView loadHTMLString:html baseURL:[[NSURL alloc] init]];
    [connenction cancel];
    [mutableData setData:[NSData data]];
}

 - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
    // 清空数据
    [mutableData setData:[NSData data]];
}

以上方法亲测可行，而且如果你在用http请求时通过 bridgeWebview 实现了JS交互，也是可以的，不会有任何影响，只需在你之前的 UIWebviewController 中实现上面的几个代理方法 就可以了，这样既兼容了 http 请求 也可以兼容 https 请求。