Javascript 使用WKWebView Objective C在AngularJS中形成帖子

基本上我对AngularJS不太了解。我的任务是在WKWebView中加载网页。在该页面中，我必须预先填写用户名和密码，并使用JavaScript以编程方式点击登录按钮。我已经使用JavaScript填充了用户名和密码字段。但问题是，当我通过执行javascript单击登录按钮时，它不会向服务器共享任何内容。这是我的表格：

<div class="container ng-scope" ng-controller="LogonController">
<div class="panel panel-default center">
  <div class="panel-heading titletext" id="logo">
     <img src="images\black.png">
  </div>
  <div class="panel-body">
     <!-- ngRepeat: alert in alerts -->
     <form class="form-horizontal center ng-pristine ng-valid" ng-submit="submitCredentials()">
        <div class="control-group">
           <label class="control-label" for="userId">User ID:</label>
           <div class="controls">
              <input type="text" id="useremail" ng-model="userId" autofocus="autofocus" class="ng-pristine ng-untouched ng-valid">
           </div>
        </div>
        <div class="control-group">
           <label class="control-label" for="inputPassword">Password:</label>
           <div class="controls">
              <input type="password" id="userpassword" ng-model="password" class="ng-pristine ng-untouched ng-valid">
           </div>
        </div>
        <div style="margin-top:5px"></div>
        <div class="control-group">
           <div class="controls">
              <button type="submit" class="btn btn-default center"><img src="images/login2.png"> Sign in</button>
           </div>
        </div>
     </form>
  </div>

这是我的stringByEvaluatingJavaScriptFromString方法：

- (NSString *)stringByEvaluatingJavaScriptFromString:(NSString *)script {
__block NSString *resultString = nil;
__block BOOL finished = NO;

[self.webView evaluateJavaScript:script completionHandler:^(id result, NSError *error) {
    if (error == nil) {
        if (result != nil) {
            resultString = [NSString stringWithFormat:@"%@", result];
        }
    } else {
        NSLog(@"evaluateJavaScript error : %@", error.localizedDescription);
    }
    finished = YES;
}];

while (!finished)
{
    [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
}

return resultString;
}

用户名和密码为空，因为以“ng pristine ng untouched ng valid”的形式进行了验证。只要我用iPhone的键盘输入用户名和密码，它就会让我通过javascript调用按钮点击来登录。在使用JS执行的javascript提交表单之前，是否有任何方法可以调用或验证表单中的“ng pristine ng untouched ng valid”

注意：我没有权利在服务器中更改JS。无论我要做什么，都必须来自iOS

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谢谢

好的。所以我找到了解决办法。这不是Javascript。所以它不会像Javascript那样工作。我们必须将其用于AngularJS，而不是document.getElementById：

NSString *submitUserRequest = [NSString stringWithFormat:@"angular.element(document.getElementById('useremail')).scope().userId='%@';", [email stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];
NSString *submitPasswordRequest = [NSString stringWithFormat:@"angular.element(document.getElementById('userpassword')).scope().password='%@';", [password stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];

因为之前，它没有填充文本输入字段，因为AngulaJS已经用dom指令绑定了它

NSString *submitUserRequest = [NSString stringWithFormat:@"angular.element(document.getElementById('useremail')).scope().userId='%@';", [email stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];
NSString *submitPasswordRequest = [NSString stringWithFormat:@"angular.element(document.getElementById('userpassword')).scope().password='%@';", [password stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];