UIWebView是否可以保存并自动填写以前输入的表单值（例如，用户名和密码）？

问题描述

我正在构建一个iPhone应用程序，它只是一个现有移动网站的基于表单登录的 UIWebView 。当我在iPhone Safari上登录移动网站时，系统会提示我保存用户名/密码，然后在我稍后返回网站时自动填充。

我想在 UIWebView 中启用相同的功能，但在我的生活中，我可以不知道该怎么做。任何想法？

---

解决方案

看到接受的答案），我能够完成这件事。以下是我所做的：

设置数据

   - （BOOL） webView：（UIWebView *）webView shouldStartLoadWithRequest：（NSURLRequest *）请求导航类型：（UIWebViewNavigationType）navigationType; {
 
 //保存表单数据
 if（navigationType == UIWebViewNavigationTypeFormSubmitted）{
 
 //从页面获取数据
 NSString * username = [self.webView stringByEvaluatingJavaScriptFromString：@document.myForm.username.value]; 
 NSString * password = [self.webView stringByEvaluatingJavaScriptFromString：@document.myForm.password.value]; 
 
 //在本地存储值
 [[NSUserDefaults standardUserDefaults] setObject：username forKey：@username]; 
 [SFHFKeychainUtils storeUsername：username andPassword：password forServiceName：@MyServiceupdateExisting：YES error：nil]; 
 
 
 
 
 
 $ b 
获取数据 
 
 
 
 $> / b> 
 
 
   - （void）webViewDidFinishLoad：（UIWebView *）webView {
 $ b $ // //验证视图位于登录页面（简体）
 NSURL * requestURL = [self.webView.request URL]; 
 if（[requestURL.host isEqualToString：@www.mydomain.com]）{
 
 //检查存储的登录凭证
 NSString * username = [[NSUserDefaults standardUserDefaults ] objectForKey：@username]; 
 
 if（username.length！= 0）{
 
 //创建js字符串
 NSString * loadUsernameJS = [NSString stringWithFormat：@document.myForm.username .value ='％@'，用户名]; 
 NSString * password = [SFHFKeychainUtils getPasswordForUsername：username andServiceName：@MyServiceerror：nil]; 
 if（password.length == 0）password = @; 
 NSString * loadPasswordJS = [NSString stringWithFormat：@document.myForm.password.value ='％@'，password]; 
 
 //自动填写表单
 [self.webView stringByEvaluatingJavaScriptFromString：loadUsernameJS]; 
 [self.webView stringByEvaluatingJavaScriptFromString：loadPasswordJS]; 
 
 
 
 
 $ / code> 
请注意，我使用Buzz Andersen的令人敬畏的包来存储敏感数据为了使SFHFKeychainUtils正常工作，您需要做一些事情：
 
 
在您的项目中添加 SFHFKeychainUtils.h 和 SFHFKeychainUtils.m  
 
将 Security.framework 添加到您的项目中 
 
  #import< Security / Security。 h>和 #importSFHFKeychainUtils.h 
 
 
 
 
解决方案
从我看，我不认为有一个简单的方法来做到这一点。以下是可能工作原理：
 
 
 
 
 
创建您的uiwebview 
 
 
在您的webview委托页面加载函数触发查找请求的http正文后，创建一个nsurlrequest 
 
 
 
 
找到登录表单（正则表达式常见的登录表单）
 
 
检索让用户选择保存并稍后检索
 
 
 
I'm building an iPhone app that is just a UIWebView of an existing mobile site that has a form-based login. When I login to the mobile site on iPhone Safari, I'm prompted to save my username/password, and it's then autofilled when I go back to the site later.  
I'd like to enable the same functionality in the UIWebView, but for the life of me, I can't figure out how to do it.  Any ideas?
Solution
Following Michael's basic model (see accepted answer), I was able to get this done.  Here's what I did:
SETTING DATA
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType; {

    //save form data
    if(navigationType == UIWebViewNavigationTypeFormSubmitted) {

        //grab the data from the page
        NSString *username = [self.webView stringByEvaluatingJavaScriptFromString: @"document.myForm.username.value"];
        NSString *password = [self.webView stringByEvaluatingJavaScriptFromString: @"document.myForm.password.value"];

        //store values locally
        [[NSUserDefaults standardUserDefaults] setObject:username forKey:@"username"];
        [SFHFKeychainUtils storeUsername:username andPassword:password forServiceName:@"MyService" updateExisting:YES error:nil];

    }

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

    //verify view is on the login page of the site (simplified)
    NSURL *requestURL = [self.webView.request URL];
    if ([requestURL.host isEqualToString:@"www.mydomain.com"]) {

        //check for stored login credentials
        NSString *username = [[NSUserDefaults standardUserDefaults] objectForKey:@"username"];

        if (username.length != 0 ) {

            //create js strings
            NSString *loadUsernameJS = [NSString stringWithFormat:@"document.myForm.username.value ='%@'", username];
            NSString *password = [SFHFKeychainUtils getPasswordForUsername: username andServiceName:@"MyService" error:nil];
            if (password.length == 0 ) password = @"";
            NSString *loadPasswordJS = [NSString stringWithFormat:@"document.myForm.password.value ='%@'", password];

            //autofill the form
            [self.webView stringByEvaluatingJavaScriptFromString: loadUsernameJS];
            [self.webView stringByEvaluatingJavaScriptFromString: loadPasswordJS];

        }
    }
}
Note that I'm using Buzz Andersen's awesome SFHFKeychainUtils package to store sensitive data to the iOs Keychain.
In order to get SFHFKeychainUtils working, you need to do a few things:
Add SFHFKeychainUtils.h and SFHFKeychainUtils.m to your project
Add the Security.framework to your project
#import <Security/Security.h> and #import "SFHFKeychainUtils.h"
 解决方案 
From my looking I don't think there is an easy way to do it. Here is an idea of what might work though:
create your uiwebview
create a nsurlrequest
after your webview delegate page loaded function fires look in the request's http body
find the form for login (regex for common login forms?)
retrieve give the user the option to save it and then retrieve later
                        
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