在UIWebView中打开的HTML页面中自动填充用户名和密码

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各自的字段：

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？

我遇到了另外一个问题：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 . 如何解决这个问题呢 ？

更新：目前我已经能够登录mail.google.com但无法完成belleandclive.com的相同操作 . 该网站是否针对其登录表单实施了任何安全措施？