I have an iOS app that needs OAuth authentication of a Facebook account, but I have to use my own server for the API calls.
So I want to open a FBLogin screen (UIWebView), with a login URL, when a certain button is clicked.
I have the following code:
FBWebViewController.h
#import <UIKit/UIKit.h>
#interface FBWebViewController : UIViewController <UIWebViewDelegate>
- (void)initFBWebView;
#end
FBWebViewController.m
- (void)initFBWebView {
NSLog(#"DetailViewController->initUIWebView {");
UIWebView *aWebView;
// init and create the UIWebView
aWebView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 400)];
aWebView.autoresizesSubviews = YES;
aWebView.autoresizingMask=(UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth);
//set the web view delegates for the web view to be itself
[aWebView setDelegate:self];
//Set the URL to go to for your UIWebView
NSString *urlAddress = #"http://www.google.com";
//Create a URL object.
NSURL *url = [NSURL URLWithString:urlAddress];
//URL Requst Object
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
//load the URL into the web view.
[aWebView loadRequest:requestObj];
//add the web view to the content view
[self.view addSubview:aWebView];
}
and in my Authorize.m file, which handles all the API calls etc.
- (void)fbLogin:(NSMutableArray*)arguments withDict:(NSMutableDictionary*)options {
FBWebViewController *webview = [[FBWebViewController alloc] init];
[webview view];
[webview initFBWebView];
}
Nothing happens. No WebView is opened. I put some debug statements in the initWithFbWebView method, and the method is called and run until the end, but no screen is showing up.
What am I doing wrong?
Related
I have a master table and detail view controller. The detail VC shows URLs through a web view.
If using the built in navigation of the master/detail setup, if I go back and then press a different table cell, the detail view will update the web view. This is true whether I use a UIWebView or a WKWebView.
However, within the detail view, without having to go back to the table, I want to give the user the option to view more than one url through the same web view. I am trying to do this in viewwillappear by changing the url for the request. However, the UIWebView (or alternatively WKWebView) continue to show the same url. I can't seem to get rid of the first url.
I've tried all kinds of ways to close or stop the existing web view, clear the cache, delete cookies etc. before reloading the new one but still see the same url. Would appreciate any suggestions. Here is my code and some of the things I've tried that don't work:
-(void) changeURL: (NSNumber*)param {
NSURL *testurl1=[NSURL URLWithString:#"http://www.apple.com"];
NSURL *testurl2 =[NSURL URLWithString:#"http://www.google.com"];
//if param is 1 {
_urlToLoad = testurl1;}
else {
_urlToLoad = testurl2;}
}
Edit: Method below is updateInterface, not viewWillAppear
-(void) updateInterface {
UIWebView *webView;
NSURLRequest *request=[NSURLRequest requestWithURL:_urlToLoad];
webView = nil;//This blocks the web view from loading at all for some reason I can't understand. Setting wkWebView to nil does not block loading.
[webView stopLoading];//no effect
[webView loadRequest:request];
[[NSURLCache sharedURLCache] removeCachedResponseForRequest:request];
[[NSURLCache sharedURLCache] removeAllCachedResponses];
NSString *myDomain = #"www.google.com";
for(NSHTTPCookie *cookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]) {
if([[cookie domain] isEqualToString:myDomain]) {
[[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie];
}
}
//wkwebview version
WKWebView *wkwebView;
WKWebViewConfiguration *wkConfig = [[WKWebViewConfiguration alloc] init];
wkwebView = nil;
wkwebView = [[WKWebView alloc] initWithFrame:self.view.frame configuration:wkConfig];
wkwebView.navigationDelegate = self;
[wkwebView loadRequest:request];
[webView addSubview:wkwebView];
CGRect webFrame = [[UIScreen mainScreen] applicationFrame];
webFrame.origin.y = 100.0; // statusbar
webFrame.origin.y -= 100.0; // statusbar 20 px cut from y of frame
webView = [[UIWebView alloc] initWithFrame:webFrame];
}
The UIViewController method "viewWillAppear" has the following signature in Objective-C:
- (void)viewWillAppear:(BOOL)animated
, you implemented it without any arguments.
The result is that, instead of being taken as an override of the original method defined in the superclass UIViewController, it is treated as a brand new, custom method introduced by your subclass; and unless you call it explicitly somewhere, it will never execute.
Source: SDK Reference
I use WKWebView to show a web page. When I touch a button on the page, some javascript code should work and show me an alert view. But it doesn't work. If I open the page on Safari, it works well. Here is my code
WKWebViewConfiguration *configuration = [WKWebViewConfiguration new];
configuration.preferences.javaScriptCanOpenWindowsAutomatically = YES;
configuration.preferences.javaScriptEnabled = YES;
_webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:configuration];
self.view = _webView;
NSURLRequest *req = [NSURLRequest requestWithURL:[HPBNetworkBusiness getExamPageURL]];
[_webView loadRequest:req];
[_webView addObserver:self forKeyPath:#"URL" options:NSKeyValueObservingOptionNew context:nil];
WKWebView will not show JavaScript alerts automatically. It will be notified through
webView:runJavaScriptAlertPanelWithMessage:initiatedByFrame:completionHandler: defined on WKUIDelegate. You can use the information passed in to show a native alert using UIAlertController.
I'm a newbie in iOS programming, i am trying to make an iOS library that can be useful on my future applications. The app will have a button that will call the library and will load a website(the address link will come from the application).
I tried searching but none of it is working.
WebLibrary.h
#import <Foundation/Foundation.h>
#interface WebLibrary : NSObject
- (void)showUIWebView:(NSURL*)urlToOpen
{
/* UIViewController *myVC = [self.navigationController.viewControllers lastObject];
//This is your last view in the navigationController hierarchy.
UIWebView *newWebView = [[UIWebView alloc] initWithFrame:myVC.view.frame];
[myVC.view addSubview:newWebView];
*/
}
#end
WebLibrary.m
#import "WebLibrary.h"
#implementation WebLibrary
/* -(void) showUIWebView:(NSURL*)urlToOpen
{
//some codes here
}
*/
#end
If you want to load an URL on your webview, you need to call the loadRequest: method to perform it, example:
NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL:[NSURL URLWithString:_urlPath]];
[request addValue:#"YES" forHTTPHeaderField:#"Mobile-App"];
[_webView loadRequest:request];
You can add the webview to your viewcontroller in viewDidLoad method:
-(void) viewDidLoad{
[super viewDidLoad];
//custom your view
_webView = [[UIWebView alloc] initWithFrame: self.view.frame];
_webView.scalesPageToFit = YES;
[self.view addSubView: _webView];
}
You should read about UIViewController and the methods in it to understand clearly.
I have an iOS project with the following files inside it:
**PopOverContentViewController.h,
PopOverContentViewController.m,
MasterViewController.h,
MasterViewController.m,
DetailViewController.h,
DetailViewController.m.**
I created some buttons in PopOverViewController which have this method as their action:
- (void) buttonPressed
{
NSLog(#"The button was pressed");
UIWebView *myWebView = [[UIWebView alloc]
initWithFrame:self.detailViewController.view.bounds];
NSURL *myUrl = [NSURL URLWithString:#"http://www.lau.edu.lb"];
NSURLRequest *myRequest = [NSURLRequest requestWithURL:myUrl];
[myWebView loadRequest:myRequest];
[self.detailViewController.view addSubview:myWebView];
if ([self isInPopover])
{
[self.myPopOver dismissPopoverAnimated:YES];
}
}
The problem is that I am not seeing the webpage opening, the DetailviewController doesn't change.
Keep in mind I have the following lines written in PopOverContentViewController.h:
#class DetailViewController;
#property DetailViewController *detailViewController;
And that I have imported DetailViewController.h to the implementation file of PopOverViewController.
I tried loading a page from information in the masterviewcontroller and it appeared in the detailviewcontroller, but I'm clueless as to why it isn't working from the popover.
Thank you!
I have implemented a browser in my application by using UIWebView, by default I'm loading google page in my browser.
When I search something in the google page ,the UIWebViewDelegate's webView:shouldStartLoadWithRequest:navigationType: method is called.
The problem is when I tap on the back button from this search page no delegates are getting called, so I am having a problem disabling my back button.
This problem happens only in an iPad application not in an iPhone application.
This code may help u...
A UIWebView is a UIView that can load a web page while remaining in the user's application.
Navigation to other webpages is allowed through the use of imbedded links in a web page itself. Forward and backward navigation through history can be set up with instance methods goForward and goBack, but the programmer must supply the buttons.
The following example uses a UIWebView, and
1) adds forward and backward buttons. The buttons are enabled and highlighted using UIWebViewDelegate optional methods webViewDidStartLoad: and webViewDidFinishLoad:
2) adds a UIActivityIndicatorView which displays while the web page is loading
In the .h file for the WebViewController :
Declare the UIWebView, Optionally : add buttons to control moving forward and backward through browsing history and IBActions for pressing the buttons, Optionally again : add a UIActivityIndicatorView.
#interface WebViewController : UIViewController <UIWebViewDelegate>
{
UIWebView *webView;
UIButton *back;
UIButton *forward;
UIActivityIndicatorView *activityIndicator;
}
#property(nonatomic,retain)IBOutlet UIWebView *webView;
#property(nonatomic,retain)IBOutlet UIButton *back;
#property(nonatomic,retain)IBOutlet UIButton *forward;
#property(nonatomic,retain)IBOutlet UIActivityIndicatorView *activityIndicator;
-(IBAction)backButtonPressed: (id)sender;
-(IBAction)forwardButtonPressed: (id)sender;
#end
//In the .m file for the WebViewController
#implementation WebViewController
#synthesize webView;
#synthesize back;
#synthesize forward;
#synthesize activityIndicator;
//method for going backwards in the webpage history
-(IBAction)backButtonPressed:(id)sender {
[webView goBack];
}
//method for going forward in the webpage history
-(IBAction)forwardButtonPressed:(id)sender
{
[webView goForward];
}
//programmer defined method to load the webpage
-(void)startWebViewLoad
{
//NSString *urlAddress = #"http://www.google.com";
NSString *urlAddress = #"http://cagt.bu.edu/page/IPhone-summer2010-wiki_problemsandsolutions";
//Create a URL object.
NSURL *url = [NSURL URLWithString:urlAddress];
//URL Requst Object
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
//Load the request in the UIWebView.
[webView loadRequest:requestObj];
}
// acivityIndicator is set up here
- (void)viewDidLoad
{
//start an animator symbol for the webpage loading to follow
UIActivityIndicatorView *progressWheel = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
//makes activity indicator disappear when it is stopped
progressWheel.hidesWhenStopped = YES;
//used to locate position of activity indicator
progressWheel.center = CGPointMake(160, 160);
self.activityIndicator = progressWheel;
[self.view addSubview: self.activityIndicator];
[self.activityIndicator startAnimating];
[progressWheel release];
[super viewDidLoad];
//call another method to do the webpage loading
[self performSelector:#selector(startWebViewLoad) withObject:nil afterDelay:0];
}
- (void)dealloc
{
[webView release];
[back release];
[forward release];
[activityIndicator release];
[super dealloc];
}
#pragma mark UIWebViewDelegate methods
//only used here to enable or disable the back and forward buttons
- (void)webViewDidStartLoad:(UIWebView *)thisWebView
{
back.enabled = NO;
forward.enabled = NO;
}
- (void)webViewDidFinishLoad:(UIWebView *)thisWebView
{
//stop the activity indicator when done loading
[self.activityIndicator stopAnimating];
//canGoBack and canGoForward are properties which indicate if there is
//any forward or backward history
if(thisWebView.canGoBack == YES)
{
back.enabled = YES;
back.highlighted = YES;
}
if(thisWebView.canGoForward == YES)
{
forward.enabled = YES;
forward.highlighted = YES;
}
}
#end
/*****************************/
//In viewDidLoad for the class which adds the WebViewController:
WebViewController *ourWebVC = [[WebViewController alloc] initWithNibName:#"WebViewController" bundle:nil];
ourWebVC.title = #"WebView";
[self.view addSubview:ourWebVC];
//release ourWebVC somewhere else
In your case ,You have to ignore/avoid "caching data". Following lines of code may help.
NSURLRequest *requestObj = [NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.google.com"] cachePolicy: NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:10.0];
[webView loadRequest:requestObj];