iOS js

[webView stringByEvaluatingJavaScriptFromString:@"document.getElementById("idNumber").value="6217000x10055975513";"];

    [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById("username").value="于淇";"];

NSString *username = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById("username").value;"];

    NSString *account = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById("idNumber").value;"];

CGFloat height = [[webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByClassName('tips-login')[0].offsetHeight"] floatValue];

    

    [webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByClassName('tips-login')[0].style.margin="0.3rem 3.5rem 0 3.5rem""];

NSString *info = [[UIDevice currentDevice] name];

        NSString *js = [NSString stringWithFormat:@"showInfo("name","%@")",info];

        NSString *jx = [self.webView stringByEvaluatingJavaScriptFromString:js];