iphone - 在 UIWebView 中打开的 HTML 页面中自动填充用户名和密码

Question

使用 UIWebView 自动填充数据时如何使用 RegsEx 查找登录表单？

我使用以下代码来获取所有表单数据:

int NoOfForms = [[self.browser stringByEvaluatingJavaScriptFromString:@"document.forms.length"] intValue];

NSMutableArray *formData = [[NSMutableArray alloc] initWithCapacity:0];

for (int i = 0 ;  i < NoOfForms ; i++) 
{
    // total number of elements in each form
    int elementsInForm = [[self.browser stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.forms[%d].elements.length",i]] intValue];
    for (int j = 0; j < elementsInForm; j++) 
    {
        // element id of each element
        NSString *elementID = [NSString stringWithFormat:@"document.forms[%d].elements[%d].id",i,j];
        // element value of each element
        NSString *elementValue = [NSString stringWithFormat:@"document.forms[%d].elements[%d].value",i,j];

        // dictionary for all values of each element  
        NSDictionary *elementData = [NSDictionary dictionaryWithObjectsAndKeys:
                                     [NSNumber numberWithInt:i],@"form No",
                                     [NSNumber numberWithInt:j],@"element No",
                                     [self.browser stringByEvaluatingJavaScriptFromString:elementID],@"elementID",
                                     [self.browser stringByEvaluatingJavaScriptFromString:elementValue],@"elementValue",nil];

        // add each element data to a mutable array.
        [formData addObject:elementData];
    }
}

并使用以下代码将数据放回到各自的字段中:

for (int i = 0 ; i < [dataArray count]; i++) 
{
    NSDictionary *elementDict = [dataArray objectAtIndex:i];

    int formNumber = [[elementDict objectForKey:@"form No"] intValue];
    int elementNumber = [[elementDict objectForKey:@"element No"] intValue];
    NSString *formElementID = [elementDict objectForKey:@"elementID"];
    NSString *formElementValue = [elementDict objectForKey:@"elementValue"];

    if ([[self.browser stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.forms[%d].elements[%d].id",formNumber,elementNumber]] isEqualToString:formElementID])
     {
          [self.browser stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.forms[%d].elements[%d].value='%@'",formNumber,elementNumber,formElementValue]];
     }

}

现在我只想提交登录表单..如何找到它？

我还遇到一个问题:当我的代码将密码放入其字段时，某些网站(例如 mail.google.com)确实会发生这种情况，即它会清空密码字段。如何解决这个问题？

更新:目前我已经能够登录mail.google.com，但无法登录belleandclive.com。该网站是否对其登录表单实现了任何安全措施？

Answer 1

我想你可以根据表单数据或者表单id来判断哪个是登录表单，对吧？

因此，如果登录表单id为login-form，则可以使用以下代码来提交:

NSString * js = @"document.getElementById('login-form').submit()";
[self.webview stringByEvaluatingJavaScriptFromString:js];

也可以根据表单数据判断哪个索引是登录表单来提交表单:

int index = ....// your judge code to get index
NSString * js = [NSString stringWithFormat:@"document.forms[%d].submit()", index];
[self.webview stringByEvaluatingJavaScriptFromString:js];