I want to be able to zoom in and scroll to a certain fixed position on a Facebook-webpage in my application. I manage to view the page without problems, but when I try to to zoom or scroll the UIWebView nothing happens. What am I doing wrong?
Code from ViewController.m
- (void)viewDidLoad
{
NSURL *url = [NSURL URLWithString:#"https://www.facebook.com/xxxx"];
NSURLRequest *requestURL = [NSURLRequest requestWithURL:url];
[amba loadRequest:requestURL];
[super viewDidLoad];
}
- (void) webViewDidFinishLoad:(UIWebView *)webView
{
[amba stringByEvaluatingJavaScriptFromString:#"document. body.style.zoom = 999;"];
CGPoint topOffset = CGPointMake(50, 20);
[scrollView setContentOffset:topOffset animated:YES];
}
Forgot to put webView.delegate=self; in viewDidLoad
Related
I really need help please. Initially, by tapping on a tab bar item, I will load a webview on Gym VC user will then scroll down the web view
What I am trying to accomplish is when user tap on the same tab bar item again, the webView will reload again. I managed to call the method handleRefresh from MyTabBarController But the method doesn't do anything at all. Any guidance is much appreciated.
Currently I have the following code
MyTabBarController.m
#import "GymNavigationController.h"
#import "Gym.h"
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
if([viewController isKindOfClass:[GymNavigationController class]]){
Gym *myGym = [[Gym alloc] init];
[myGym handleRefresh:nil];
}
}
Gym.m
#import "Gym.h"
#import "AppDelegate.h"
#import "GymDet.h"
#import <QuartzCore/QuartzCore.h>
#interface Gym () {
AppDelegate *appDelegate;
NSString *sURL, *sRefresh;
}
#end
#implementation Gym
#synthesize webView;
- (void)viewDidLoad {
[super viewDidLoad];
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
sURL = appDelegate.gURL;
sURL = [sURL stringByAppendingString:#"/apps/gym.asp?"];
NSLog(#" The sURL to be load for the current page : %# ", sURL);
sRefresh = sURL;
[defaults setObject:sRefresh forKey:#"txtRefresh"];
[defaults synchronize];
NSURL *url = [NSURL URLWithString:sURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView setDelegate:(id<UIWebViewDelegate>)self];
[webView loadRequest:urlRequest];
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:#selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
[webView.scrollView addSubview:refreshControl];
}
- (void) viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
//[self handleRefresh:nil];
[[self navigationController] setNavigationBarHidden:YES animated:YES];
}
-(void)viewDidDisappear:(BOOL)animated{
[[self navigationController] setNavigationBarHidden:NO animated:YES];
}
- (void)handleRefresh:(UIRefreshControl *)refresh {
//--- Call the stored txtMemCode, something like session ---
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
sRefresh = [defaults objectForKey:#"txtRefresh"];
NSURL *url = [NSURL URLWithString:sRefresh];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView loadRequest:urlRequest];
[refresh endRefreshing];
}
First i would like to suggest why you're initiating a new Gym object every time tabbar is tapped you should take a reference of the Gym object and initialise it if its nil then process ahead with the reference, but it maybe your requirement and if it is i would like to suggest you to create a BOOL variable lets say isUpdateRequire and when you're instantiating your viewcontroller assign isUpdateRequire = true. Then in the end of view did load or view will appear (according to your need) check
if isUpdateRequire {
[self handleRefresh:nil]
}
Alternatively you can create protocols in your webviewcontroller and assign its delegate to your tabbarcontroller and fire the delegate method when ever required.
and if you don't want the method to call when you come back to vc simply put this condition in viewWillAppear
if self.isMovingToParentViewController {
[self handleRefresh:nil]
}
Edited
My initial webview is loaded when a tabbar is pressed, then when clicked on the webview, I called
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType
to detect the URLString clicked
When the string matches my destination string, I will call the segue [self performSegueWithIdentifier:#"NewsDet" sender:self]; and also pass the URLString and load the detail page on another ViewController
Now, when I click the another tabbar and then click back to this tabbar. The detail page remains. I want to refresh back to initial page. How do I do so?
Is it the I need to create a new class with a subclass of tabviewcontroller? Please help.
Gym.m
- (void)viewDidLoad {
[super viewDidLoad];
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
sURL = appDelegate.gURL;
sURL = [sURL stringByAppendingString:#"/apps/gym.asp"];
NSURL *url = [NSURL URLWithString:sURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView setDelegate:(id<UIWebViewDelegate>)self];
[webView loadRequest:urlRequest];
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:#selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
[webView.scrollView addSubview:refreshControl];
}
- (void)handleRefresh:(UIRefreshControl *)refresh {
NSURL *url = [NSURL URLWithString:sURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView loadRequest:urlRequest];
[refresh endRefreshing];
}
- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
sURL = appDelegate.gURL;
sURL = [sURL stringByAppendingString:#"/apps/gym.asp"];
NSURL *url = [NSURL URLWithString:sURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView setDelegate:(id<UIWebViewDelegate>)self];
[webView loadRequest:urlRequest];
}
GymDet.m
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
sURL = self.urlString;
NSURL *url = [NSURL URLWithString:sURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView setDelegate:(id<UIWebViewDelegate>)self];
[webView loadRequest:urlRequest];
}
Basically I have 5 tab controllers. Each Tab has a Navigation Controller. When I click on say Tab-A it will load initial webview in VC1 then when I click on webview URL, it will navigate to a new VC say VC2 and load the detailed page.
Now, if I click on say Tab-B and back to Tab-A. I want it to load the initial webview or VC1. Now, my program always stay at VC2.
After clarification on what you're trying to do...
Your issue has nothing to do with webviews or loading URLs. The problem is that you are navigating to a new VC in your NavigationController, then switching tabs, then switching back and you are still at the "pushed" VC.
A comment not related to the problem:
I am on Tab-A, viewing VC-A1... Via "normal" Navigation Controller
action, VC-A2 slides-in from the right. Now I select Tab-B, and I see
VC-B1. Now, I want to switch back to Tab-A, and I expect to see what
was there: VC-A2... but instead, you want to send me back to VC-A1. That really doesn't follow Apple's interface guidelines, and can be very confusing to your users.
However, to accomplish that, you want to subclass UITabBarController and implement didSelectViewController:
#import "MyTabBarViewController.h"
#interface MyTabBarViewController () <UITabBarControllerDelegate>
#end
#implementation MyTabBarViewController
- (void) viewDidLoad {
[super viewDidLoad];
self.delegate = self;
}
-(void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
if ([viewController isKindOfClass:[UINavigationController class]]) {
[(UINavigationController *)viewController popToRootViewControllerAnimated:NO];
}
}
#end
That will work, but it will "reset" any Navigation Controller in every tab. You'd need to add some other logic to handle only the first tab.
(original answer)
viewDidLoad is only called once - when the view loads. Switching between tabs does not "re-load" the view.
You probably want to reload your original URL in viewWillAppear as that will be called each time you switch back to that tab.
Although, you probably also want to check if the original URL is the current one displayed - you likely only want to reload it if it's not.
And... you never want to call [self viewWillAppear:YES]; -- that is a notification provided by the system.
I have one UIViewController and inside it I have 3 UIWebView. I added swipe left to my webViews programatically. Right now I can swipe, but just 3 pages and then repeat again. I want to increase my currentPage and add this to my webView3, but I don't know how should I do that.
Would you please give me some hints? I really have problem in this part!
Here is my code:
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"test view");
NSURL *url = [NSURL fileURLWithPath:[ [ NSBundle mainBundle ] pathForResource: #"Name/Name1" ofType:#"html" ]];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[webView2 loadRequest:request];
[webView2 bringToFront];
NSURL *url = [NSURL fileURLWithPath:[ [ NSBundle mainBundle ] pathForResource:
#"Name/Name2" ofType:#"html" ]];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[webView3 loadRequest:request];
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc]
initWithTarget:self action:#selector(swipeLeftAction:)];
swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
swipeLeft.delegate = self;
[self.view addGestureRecognizer:swipeLeft];
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer
*)otherGestureRecognizer
{
return YES;
}
currentPage is an integer and at the beginning it is 0. My question is how should I add my currentPage to webView3 so that when I Swipe it increase my pages?
- (void)swipeLeftAction:(id)ignored
{
NSLog(#"Swipe Left");
UIWebView *temp = webView2 ;
webView2 = webView3;
webView3 = webView;
webView = temp;
[webView2 bringToFront];
currentPage++;
}
Thanks in advance!
****Edit:**
This current page is not connected to any webView, How Can I get this increase in my webView?**
Based on information from this post (Does UIGestureRecognizer work on a UIWebView?) it looks like gesture recognizers and webviews do not always play nice together, the reason being because of a webview's own gesture recognizers. Perhaps the best way would be to add links inside of your webview that when touched use your own scheme to increment currentPage
-(BOOL) webView:(UIWebView *)inWeb shouldStartLoadWithRequest:(NSURLRequest *)inRequest navigationType:(UIWebViewNavigationType)inType {
if ( [[[inRequest URL] absoluteString] hasPrefix:#"mySchemeIncrementPage:"] ) {
currentPage++;
NSLog(#"CURRENT PAGE COUNT: %i", currentPage);
return NO;
}
}
I am loading a remote URL and want to have a loading spinner to show the app is currently downloading the page. I have this so far, but it does not really get the job done.
- (void)viewDidLoad{
//Loading Spinner
[SVProgressHUD showWithStatus:#"Loading"];
//Load the URL
NSURL *url = [NSURL URLWithString:#"http://myURLhere.com"];
NSURLRequest *requestURL = [NSURLRequest requestWithURL:url];
[webView loadRequest:requestURL];
[super viewDidLoad];
//load done.
[SVProgressHUD dismiss];
}
Make your controller implements UIWebViewDelegate.
then you can display the loading indicator when
- (void)webViewDidStartLoad:(UIWebView *)view
get called. Then stop the indicator when
- (void)webViewDidFinishLoad:(UIWebView *)view
get called
I try to display a simple webpage inside my UIWebView without a Nib. The problem is when I click on my buttun a new page blanck page appear but nothing is display.
Did I miss something?
- (void)loadView {
UIView *topView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
UIWebView *web = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
self.webView = web;
NSString *urlAddress = #"http://www.google.com";
NSURL *url = [[[NSURL alloc] initWithString:urlAddress] autorelease];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[webView loadRequest:requestObj];
[topView addSubview:self.webView];
[web release];
}
thank you,
If this is the exact code you're using then it can't work: the webView added to topView that is never put on screen anywhere.
You probably want to add the webView to the controller view, but a better place to do that might be viewDidLoad, where self.view can be used safely.
This code works for me:
- (void)viewDidLoad {
[super viewDidLoad];
self.webView = [[[UIWebView alloc]
initWithFrame:CGRectMake(0, 0, 320, 480)] autorelease];
NSString *urlAddress = #"http://www.google.com";
NSURL *url = [[[NSURL alloc] initWithString:urlAddress] autorelease];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:requestObj];
[self.view addSubview:self.webView];
}
Using the Storyboard -
Step 1: Drag and drop a UIWebView in the View
Step 2: Then go to the .h file (for that particular view) and create an IBOutlet of a UIWebView. For example-
// MainViewController.h
#interface MainViewController : UIViewController
#property (nonatomic, strong) IBOutlet UIWebView *myWebView;
#end
Step 3: Go to the storyboard and create a connection from outlet, myWebView (This can be found in the inspector area of Xcode) to the UIWebView by doing a control drag.
Step 4: Now when we have the connection, we just need to go to the .m (for that particular view) and add the following code -
//MainViewController.m
#implementation MainViewController
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *urlNameInString = #"https://www.google.com";
NSURL *url = [NSURL URLWithString:urlNameInString];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[self.myWebView loadRequest:urlRequest];
}
#end
Here is My Solution.
Create a ViewController with WebView in Interface Builder and connect webview as IBOutlet
This code is simple and works fine
- (void)viewDidLoad
{
[super viewDidLoad];
NSURLRequest *request = [NSURLRequest requestWithURL:#"http://www.google.com.ua"];
[webView loadRequest:request];
}