I'm trying to change the value of an element in a <input type="checkbox"> from null to checked.
How would I do this from objective-C (iOS application)?
Here's the relevant HTML of the page
<td align="right" width="15%" class="darkNeutral">
<input id="chk_Assignments" type="checkbox" class="ShowAll" />
<label for="chk_Assignments">Show All</label>
</td>
I was thinking I'd use POST or something, but I'm not sure how to access the element, add a checked attribute, and set the value of the attribute to "checked".
NSString *javaScript = #"document.getElementById('chk_Assignments').setAttribute('checked', 'checked');";
// Make the UIWebView method call
NSString *response = [webViewA stringByEvaluatingJavaScriptFromString:javaScript];
NSLog(#"javascript result: %#", response);
If HTML page got jQuery included, the javascript could be simplified:
NSString *javaScript = #"$('#chk_Assignments').attr('checked', 'checked');";
NSString *response = [webViewA stringByEvaluatingJavaScriptFromString:javaScript];
NSLog(#"javascript result: %#", response);
Related
I have a html page, My requirement is in my Objective C code I need to find a text for example in the below example I have "Color Change" in <p> tag, Once I find the text, I need to change the <p> tag color value, How can we achieve it.
> <!DOCTYPE html> <html> <body>
>
> <h1 style="color:blue;">This is a heading</h1> <p
> style="color:red;">Color Change</p>
>
> </body> </html>
if you are using local html file
then this code might be helpful for you..
NSString *htmlFile = [[NSBundle mainBundle] pathForResource:#"sample" ofType:#"html"];
NSString* text = [NSString stringWithContentsOfFile:htmlFile encoding:NSUTF8StringEncoding error:nil];
NSLog(#"%#",htmlFile);
NSLog(#"Hello");
[self._webview loadHTMLString:[NSString stringWithFormat:#"<html><body bgcolor=\"#000000\" text=\"#FFFFFF\" face=\"Bookman Old Style, Book Antiqua, Garamond\" size=\"5\">%#</body></html>", text] baseURL: nil];
here in the below code color:#fff tag use for text color #fff use black color
NSString *webStr =#"Your text use";
[self._webview loadHTMLString:[NSString stringWithFormat:#"<div id ='foo' align='left' style='line-height:18px; float:left;width:300px; font-size:13px;font-family:helvetica;background-color:transparent; color:#fff;>%#<div>",webStr] baseURL:nil];
let me know , is this helpful or not for you
In the end, setTextColor: is the answer, there's an important detail missing from the earlier answers: To get this to work in iOS 8, I had to set the color =after= I set the text.
- (void)viewDidLoad
{
[super viewDidLoad];
_myTextView.textColor = [UIColor whiteColor];
_myTextView.text = #"hai hello hello..."
I have a Thymeleaf template in a simple Spring Boot application. The template contains a list in a table as follows:
<p>There are <span th:text="${#lists.size(persons)}"></span> people:</p>
<table th:if="${not #lists.isEmpty(persons)}" border="1">
<tr>
<th>ID</th>
<th>Name</th>
<th>Address</th>
<th>Telephone</th>
<th>Email</th>
<th>Actions</th>
</tr>
<tr th:each="person : ${persons}">
<td th:text="${person.personId}"></td>
<td th:text="${person.name}"></td>
<td th:text="${person.address}"></td>
<td th:text="${person.telephone}"></td>
<td th:text="${person.email}"></td>
<td>
Edit |
Delete
</td>
</tr>
</table>
I want to enable edit and delete functionality as per the last cell in the table. But at the moment both requests are for HTTP GET. That is fine for edit where a person's details are fetched from the server for editing, but delete should trigger a POST request because of the data changes on the server.
Does anyone know if Thymeleaf allow a POST request per row of a table? Or do I have to write a simple HTML form per row?
The GET form is currently:
<td>
Edit
<!--a href="#" data-th-href="#{/delete(personId=${person.personId})}">Delete</a></td-->
<form method="get" th:action="#{/edit(personId=${person.personId})}">
<button type="submit" name="submit" value="value">Edit</button>
</form>
</td>
Where I have a link and a form for testing.
The controller method to be called is:
// Gets a Person.
#RequestMapping(value="/edit", method=RequestMethod.GET)
public String getEditPerson(#RequestParam("personId") String personId, Model model) {
logger.info(PersonController.class.getName() + ".getEditPerson() method called.");
Person person = personDAO.get(Integer.parseInt(personId));
model.addAttribute("person", person);
// Set view.
return "/edit";
}
The error when the button version of GET is called is:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Sun Jul 24 00:26:16 BST 2016
There was an unexpected error (type=Bad Request, status=400).
Required String parameter 'personId' is not present`
I am using GET to trigger editing because no data is sent to the server here other than the personId. No database action is taken so it should be a GET.
you are using Links and I don't think that is possible, you would need to use a form where you can specify the method POST to be used.
In the example below im using a <button> instead of a <a> element, but it will work, the only thing you need to do is to style your button with CSS to look like your links
<form method="POST" th:action="#{/edit(personId=${person.personId})}">
<button type="submit" name="submit" value="value" class="link-button">This is a link that sends a POST request</button>
</form>
now in your code should look like this
<tr th:each="person : ${persons}">
<td th:text="${person.personId}"></td>
<td th:text="${person.name}"></td>
<td th:text="${person.address}"></td>
<td th:text="${person.telephone}"></td>
<td th:text="${person.email}"></td>
<td>
<form method="POST" th:action="#{/edit(personId=${person.personId})}">
<button type="submit" name="submit" value="value" class="link-button">EDIT</button>
</form> |
<form method="POST" th:action="#{/delete(personId=${person.personId})}">
<button type="submit" name="submit" value="value" class="link-button">DELETE</button>
</form>
</td>
</tr>
EDIT
As you just shared you Java code, in the controller you are expecting the personId not as a PathVariable, but as a RequestParam,
in that case your form should have that value...
edit your form and add the person id as follows.
<form method="POST" th:action="#{/edit}">
<input type="hidden" name="personid" id="personId" th:value="${person.personId}" />
<button type="submit" name="submit" value="value" class="link-button">This is a link that sends a POST request</button>
</form>
Notice also I changed the action of the form to be just /edit, as its what your controller looks like
Does anyone know if Thymeleaf allow a POST request per row of a table? Or do I have to write a simple HTML form per row?
HTML doesn't support POST request with links and you have to use forms (as Rayweb_on explained). But Thymeleaf allows you to define custom tags which helps a lot :
<a th:href="#{/edit(personId=${person.personId})}" custom:linkMethod="post">Edit</a>
... which would generate following HTML (assuming jQuery is available) :
Edit
Custom tag definition (without error checking to keep it simple) :
/**
* Custom attribute processor that allows to specify which method (get or post) is used on a standard link.
*/
public class LinkMethodAttrProcessor extends AbstractAttributeTagProcessor {
private static final String ATTR_NAME = "linkMethod";
private static final int PRECEDENCE = 10000;
public LinkMethodAttrProcessor(final String dialectPrefix) {
super(
TemplateMode.HTML, // This processor will apply only to HTML mode
dialectPrefix, // Prefix to be applied to name for matching
null, // No tag name: match any tag name
false, // No prefix to be applied to tag name
ATTR_NAME, // Name of the attribute that will be matched
true, // Apply dialect prefix to attribute name
PRECEDENCE, // Precedence (inside dialect's own precedence)
true); // Remove the matched attribute afterwards
}
#Override
protected void doProcess(final ITemplateContext context, final IProcessableElementTag tag,
final AttributeName attributeName, final String attributeValue,
final IElementTagStructureHandler structureHandler) {
// get the method name (tag parameter)
final IEngineConfiguration configuration = context.getConfiguration();
final IStandardExpressionParser parser = StandardExpressions.getExpressionParser(configuration);
final IStandardExpression expression = parser.parseExpression(context, attributeValue);
final String method = (String) expression.execute(context);
// add custom javascript to change link method
final String link = tag.getAttribute("href").getValue();
final String action = "$('<form action="" + link + "" method="" + method + ""></form>').appendTo('body').submit(); return false;";
structureHandler.setAttribute("onclick", action);
structureHandler.setAttribute("href", "#");
}
}
See the Thymelead documentation for example of how this custom attribute needs to be registered.
I'm using WKWebView loading html string, some end of html string have a few of ugly image links, i want to hide them.
The css use to hide image, but not works.
.article img[src* = "/smilies/"],
.article img[src* = ".feedburner.com/~ff/"],
.article img[src* = ".feedburner.com/~r/"],
.article img[src* = ".feedblitz.com/"]
{
display: none;
}
The sample html string with feedburner src i want to hide :
<div>
<img src="http://feeds.feedburner.com/~ff/Venturebeat?d=yIl2AUoC8zA" border="0"> <img src="http://feeds.feedburner.com/~ff/Venturebeat?d=qj6IDK7rITs" border="0"> <img src="http://feeds.feedburner.com/~ff/Venturebeat?i=H9eoOCii8XI:sanX3-jfWnw:V_sGLiPBpWU" border="0"> <img src="http://feeds.feedburner.com/~ff/Venturebeat?d=I9og5sOYxJI" border="0"> <img src="http://feeds.feedburner.com/~ff/Venturebeat?i=H9eoOCii8XI:sanX3-jfWnw:D7DqB2pKExk" border="0">
</div>
A quick and dirty way to achieve this is by using regular expressions. Mind you that this is really not ideal for long HTML files as it is not as efficient as a real HTML parser.
// The HTML you posted
NSString *HTML = #"<div>\n\t<img src=\"http://feeds.feedburner.com/~ff/Venturebeat?d=yIl2AUoC8zA\" border=\"0\"> <img src=\"http://feeds.feedburner.com/~ff/Venturebeat?d=qj6IDK7rITs\" border=\"0\"> <img src=\"http://feeds.feedburner.com/~ff/Venturebeat?i=H9eoOCii8XI:sanX3-jfWnw:V_sGLiPBpWU\" border=\"0\"> <img src=\"http://feeds.feedburner.com/~ff/Venturebeat?d=I9og5sOYxJI\" border=\"0\"> <img src=\"http://feeds.feedburner.com/~ff/Venturebeat?i=H9eoOCii8XI:sanX3-jfWnw:D7DqB2pKExk\" border=\"0\">\n</div>";
// A string containing source of the images that you want to delete
NSString *source = #"http://feeds.feedburner.com/~ff/";
// Builds a pattern that matches the tags of the images you want to delete
NSString *pattern = [NSString stringWithFormat:#"<img src=\"%#.+?>", source];
// The actual delete operation
NSString *cleanHTML = [HTML stringByReplacingOccurrencesOfString:pattern
withString:#""
options:NSRegularExpressionSearch
range:NSMakeRange(0, HTML.length)];
// Do what you want with the cleaned HTML (display it, ...)
NSLog(#"%#", cleanHTML);
I'm trying to get string from the following html code
<tr class="details">
<td>
07/11/2012 09:30
</td>
<td>
something
</td>
<td>
1.0
</td>
<td>
something 2
</tr></td>
I want to get string like "07/11/2012 09:30 something 1.0 something 2". I already have my html code parsed and stored in a NSString called "html". Thinking of getting a string out of this code and then parsing it with NSXMLParser to display it as a single string without this tags in it, but this seems to be a lot of hassle. Should be a easier way to do it. Any way this is the code I am using:
NSRange r = [html rangeOfString:#"<tr class="details">"];
if (r.location != NSNotFound) {
NSRange r1 = [html rangeOfString:#"</tr>"];
if (r1.location != NSNotFound) {
if (r1.location > r.location) {
NSString *infoString = [html substringWithRange:NSMakeRange(NSMaxRange(r), r1.location - NSMaxRange(r))];
NSLog(#"info %#", infoString);
}
}
}
I couldn't get away with the semi-colon in the opening tag.
Any ideas how can I implement this task?
I want to ask something about the NSString in objective C. I use the following code to retrieve some of the HTML content.
NSHTTPURLResponse *response = nil;
NSError *error = nil;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *data = [[NSString alloc]initWithData:responseData encoding:NSUTF8StringEncoding];
In the data, it contains lot of HTML code e.g.
<!DOCTY... >
...
// retrieve the content from <form> to </form>
<form method="post" action="...">
<input type="..." name="name_1" value="value_1" />
<input type="..." name="name_2" value="value_2" />
</form>
...
</html>
I want to get the content of the name_1, value_1, name_2 and value_2 to and NSString, just like
NSString A = "name_1"
NSString B = "value_1"
NSString C = "name_2"
NSString D = "value_2"
Does the NSString provide this kind of search or method to retrieve the string? Thank you very much.
NSString can and does but it would be very messy.
If you are intent on parsing the NSString take a look a NSScanner, otherwise check out parsing using the NSXMLDocument
--Frank