I have a strange problem and I have no idea how to solve it. I have a root viewcontroller. Via button you can switch to the child viewcontroller. In the child view controller I open a link like this as a request to the webview:
myURL = [NSURL URLWithString:#"http://m.imdb.com/video/imdb/vi2284695065/"];
NSURLRequest *myRequest = [NSURLRequest requestWithURL:myURL];
[myWebView loadRequest:myRequest];
the video on the page is autoplaying and switching to fullscreen mode. In exactly this moment I get a log message which indicates that the viewdidload method on my rootviewcontroller is called. Which eventually makes my code not working anymore. But why? Its not the viewdidload of the current viewcontroller its the one of the rootviewcontroller?! I don´t know what kind of code I should provide actually...
Edit
I switch to viewcontroller like this:
UIViewController *NVC = [self.storyboard instantiateViewControllerWithIdentifier:#"child"];
[self presentViewController:NVC animated:NO completion:nil];
The rootviewcontroller does not get a received memory warning.
Related
In my root UIViewController I present a UINavigationController. The UINavigationController ultimately pushes another view (let's call it MyViewController). How can I dismiss the entire UINavigationController (and the views it has pushed) from MyViewController?
From MyViewController, I've tried calling [[self.navigationController presentingViewController] dismissViewControllerAnimated:NO completion:nil] but nothing happend. I've also tried first popping all the view controllers off the navigation controller but, still, the navigation controller was not dismissed.
Thanks!
UPDATE:
I've tracked down what's causing this issue but haven't been able to solve it. The UINavigationController described above is a custom subclass of UIImagePickerController (we'll call it CameraController) with source type UIImagePickerControllerSourceTypeCamera. Everything works as expected (using the answer provided below) until I set a custom cameraOverlayView on the CameraController in viewDidLoad. Commenting out the following lines gets things working:
self.showCameraControls = NO;
UIView *overlay = [[[NSBundle mainBundle] loadNibNamed:#"CameraController" owner:self options:nil] objectAtIndex:0];
self.cameraOverlayView = overlay;
You can call dismissViewControllerAnimated:NO on your self.navigationController itself.
[self.navigationController dismissViewControllerAnimated:NO completion:nil];
I am in the appdelegate of my application. How can I add a modal view controller in the "didfinishlaunching" method?
I tried the following but did not work
SomeViewController *vc = [[SomeViewController alloc]init];
[self.tabController.navigationController presentModalViewController:vc animated:NO];
EDIT:
I changed my implementation to the following
self.tabController.selectedViewController
= [self.tabController.viewControllers objectAtIndex:0];
SomeViewController *vc = [[SomeViewController alloc]init];
[self.tabController.selectedViewController presentModalViewController:vc animated:NO];
I checked that the 'selected view controller' is not null... however I am still not able to get the output I needed. Is there anything I am missing?
Assuming tabController and navigationController are not nil, the applicationDidFinishLaunching may be too soon to display the modal view controller.
Make sure you put that code after you make the window key and visible. [self.window makeKeyAndVisible];
If that does not work try listening for the UIWindowDidBecomeKeyNotification for that window
You can try delaying presentation of that modal a few seconds using performSelector:withObject:afterDelay:
This is probably a simple question...
I have a UIView with a button that corresponds to a URL address http:// etc. I want to be able to click this web address button and have it load a UIWebView on a separate UIViewController and XIB that shows the website, allowing me to then hit a back button and go back to my first view that has the original button. Basically I want to be able to load the webpage but have it operate within the App rather than start up Safari. Is this possible?
So far I have build a dedicated XIB and ViewController for my webpage for which the viewDidLoad method looks like this:
- (void)viewDidLoad{
[super viewDidLoad];
NSString *urlAddress = pushURL; //pushURL is passed as parameter
NSURL *url = [NSURL URLWithString:urlAddress];
NSURLRequest *requestObject = [NSURLRequest requestWithURL:url];
[webView loadRequest:requestObject];
[addressBar setText:urlAddress];
}
Question is... how do I call the UIWebView from my button (which is in the first class/parent viewController)? All my other viewControllers in my app are using UITableView so it's a simple DidSelectRowAtIndex.
Thanks.
It sounds like you want to be using a UINavigationController. Then when the button is tapped just push the UIViewController with the web view to the UINavigationController.
I have an app at the moment that when a button is pushed on the first screen does some work and makes a URL, and then does
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:currentURL]];
which launches Safari with my URL. I want instead to have a webview launch from here so the user can do some custom things with it. I am still having a hell of a time understanding MVC in iOS and need help. My project is minimal and consists of an AppDelegate.h/m and a ViewController.h/m, the.m of the view controller is where the function that does this Safari launch lives.
Can anyone help me understand how to do what I'm trying to d?
Thanks...
The simplest way is just to add a UIWebView when the button gets pressed. Add this method to your ViewController.m and have this be performed when the button gets pressed.
Programmatically:
//This method should get called when you want to add and load the web view
- (void)loadUIWebView
{
UIWebView *webView = [[UIWebView alloc] initWithFrame:self.view.bounds]; //Change self.view.bounds to a smaller CGRect if you don't want it to take up the whole screen
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:currentURL]]];
[self.view addSubview:webView];
[webView release];
}
Using Interface Builder:
1) Add a UIWebView object to your interface.
2) Set the "hidden" property to checked (in the "Attributes Inspector" window in Interface Builder). You'll keep it hidden until you want to show it.
3) Add the following code to your ViewController.h, below the other #property lines:
#property (nonatomic, retain) IBOutlet UIWebView *webView;
4) Add the following line below the #synthesize in your ViewController.m
#synthesize webView;
And add [webView release]; in the dealloc method.
5) Go back into IB and click on File's Owner, and connect the webView outlet to the webView you created.
6) Add the following method instead of the method I showed above (for the programmatic example):
//This method should get called when you want to add and load the web view
- (void)loadUIWebView
{
[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:currentURL]]];
self.webView.hidden = NO;
}
You could set up an IBAction method to respond to the button press, but it sounds like you already have the button press working, so I wouldn't bother with that now.
As far as adding a button above the web view, you can either subclass web view and add the button there, or just have a separate button you define in your nib or programmatically and have that hide the webView to "get rid of it".
For adding UIWebView using Swift to your app just drag the WebView to your story board and then using an assistant editor connect WebView to ViewController.swift
And then Loading URL to WebView is very easy. Just create a WebView in your storyboard and then you can use the following code to load url.
let url = NSURL (string: "https://www.simplifiedios.net");
let request = NSURLRequest(URL: url!);
webView.loadRequest(request);
As simple as that only 3 lines of codes :)
Ref: UIWebView Example
Since this is the top result on Google, if you can use WKWebView instead of UIWebView, you should.
import WebKit
let webViewConfiguration = WKWebViewConfiguration()
let webView = WKWebView(frame: CGRect(), configuration: webViewConfiguration)
I have a modal view controller that I am trying to present a web view in it. Tthe first time it appears, it shows up as blank. When I close it out and click it again, however, it displays fine. I'm thinking it may be an issue with the loading of the webView, but I've tried displaying it only when the webView finishes loading, but it never gets called then.
NSURL* newURL = [[NSURL alloc] initFileURLWithPath: fileString];
NSURLRequest *newURLRequest = [[NSURLRequest alloc] initWithURL: newURL];
[webViewController.webView loadRequest: newURLRequest];
[newURL release];
[newURLRequest release];
webViewController.modalPresentationStyle=UIModalPresentationPageSheet;
[self presentModalViewController:webViewController animated:YES];
The webView control won't be accessible the first time until the first present call causes controls to be loaded and initialized. Before the first present, webViewController.webView will be nil and so calling loadRequest on it will do nothing.
You could move the loadRequest call after the presentModalViewController call.
But instead of accessing controls in view controller's views directly, it'd be better to declare the url string as a NSString property (called say urlString) in WebViewController and set it to fileString before the presentModalViewController call (and don't create the NSURL, etc there):
webViewController.urlString = fileString;
[self presentModalViewController:webViewController animated:YES];
Finally, in WebViewController, in viewWillAppear: or viewDidAppear:, create the NSURL (using urlString), create the NSURLRequest, and call loadRequest.