UIWebView webViewDidFinishLoad not getting called iOS

问题

I am loading some file from document directory using UIWebView. I have set the delegate of UIWebView and I am responding to 2 methods of delegate that is webViewDidStartLoad and webViewDidFinishLoad I am receiving the webViewDidStartLoad But I am not receiving webViewDidFinishLoad method.

Below is the code:

@interface MyView: UIViewController <UIWebViewDelegate> {
           UIWebView *webView;
}

@property (nonatomic, retain) UIWebView *webView;

========================= Class ===========================

-(void)viewDidLoad {
    CGRect webFrame = [[UIScreen mainScreen] applicationFrame];
    mWebView = [[UIWebView alloc] initWithFrame:webFrame];
    mWebView.delegate = self;
    mWebView.scalesPageToFit = YES;
    [self.view addSubview:mWebView];
        NSString *path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@", pathString]];

    [mWebView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]] ];
}

// Delegate methods

-(void)webViewDidStartLoad:(UIWebView *)webView {
    NSLog(@"start");    
}   

-(void)webViewDidFinishLoad:(UIWebView *)webView {
    NSLog(@"finish");   
}


-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
    NSLog(@"Error for WEBVIEW: %@", [error description]);
}

Please let me know what is going wrong. I am not getting any error in didFailLoadWithError delegate method.

Note:- the file that I am loading are huge say 3 MB.

Thanks

=============EDITED==================

As I was loading very huge File the delegate was coming after very long duration that I was not able to notice but for small files everything is working fine

回答1:

Hey probably you should do this,

-(void)viewDidLoad {

   //webView alloc and add to view

    CGRect webFrame = [[UIScreen mainScreen] applicationFrame];
    mWebView = [[UIWebView alloc] initWithFrame:webFrame];
    mWebView.delegate = self;
    mWebView.scalesPageToFit = YES;
    [self.view addSubview:mWebView];

    //path of local html file present in documentsDirectory

     NSString *path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@", pathString]];

    //load file into webView
    [mWebView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]] ];

    //show activity indicator
    [self showActivityIndicator]
}

Call removeLoadingView method in the following UIWebViewDelegate methods

-(void)webViewDidFinishLoad:(UIWebView *)webView {

  [self removeLoadingView];   
   NSLog(@"finish");   
}


-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {

    [self removeLoadingView];
    NSLog(@"Error for WEBVIEW: %@", [error description]);
}

The showActivityIndicator method

-(void) showActivityIndicator
{
  //Add a UIView in your .h and give it the same property as you have given to your webView. 
  //Also ensure that you synthesize these properties on top of your implementation file

       loadingView = [UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]
       loadingView.alpha = 0.5;

 //Create and add a spinner to loadingView in the center and animate it. Then add this loadingView to self.View using

    [self.view addSubView:loadingView];
}

The removeLoadingView method

-(void) removeLoadingView
{
   [loadingView removeFromSuperView];
}

回答2:

Well, does your webview actually finish loading? You should implement the webView:didFailLoadWithError:, too to catch failures.

Since you're not getting either the failure or success message. There might be something wrong with the data that you're trying to load.

Try telling the webView to load an HTML string ("Hello World!"), and see if that succeeds. If it does, then the problem is with your data resource or the path to it.

回答3:

WebView Delegates

Download MBProgessHUD
Add to your Project
When the page begins load loading (*) progess started and hide after page loaded successfully

.h file

    @interface WebViewViewController : UIViewController <MBProgressHUDDelegate,   UIWebViewDelegate>
   {
     MBProgressHUD *HUD;

   }

.m File

- (void)webViewDidStartLoad:(UIWebView *)webView
{
HUD = [[MBProgressHUD alloc] initWithView:self.navigationController.view];
[self.navigationController.view addSubview:HUD];

HUD.delegate = self;
HUD.labelText = @"Loading";
[HUD show:YES];
}

-(void)webViewDidFinishLoad:(UIWebView *)webView
{
     [HUD hide:YES];
}

回答4:

Probably it is experiencing an error. Implement –webView:didFailLoadWithError: and check.

回答5:

Make sure to implement the delegate ( ) in the view's .h file and connect the delegate to the view. This fixed it for me.

回答6:

.h file

@property (retain, nonatomic) IBOutlet UIWebView *webview;

.m file

 -(void)viewDidLoad {
   NSString *urlAddress = @"YOUR_URL";
   _webview.scalesPageToFit = YES;

 //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];
}
- (void)webViewDidStartLoad:(UIWebView *)webView;
{
    [self.indicater_web startAnimating];
}
//a web view starts loading
- (void)webViewDidFinishLoad:(UIWebView *)webView;
{
    [self.indicater_web stopAnimating];
}
//web view finishes loading
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error;
{
    [self.indicater_web stopAnimating];
}
- (BOOL)webView:(UIWebView *)wv shouldStartLoadWithRequest:(NSURLRequest *)rq
{
    [self.indicater_web startAnimating];
    return YES;
}

来源：https://stackoverflow.com/questions/6031034/uiwebview-webviewdidfinishload-not-getting-called-ios

标签

iphone

cocoa-touch

ios

uiwebview