UIWebView webViewDidFinishLoad没有被称为iOS

Question

我正在使用UIWebView从文档目录加载一些文件.我已经设置的UIWebView的委托,我回应委托的2个方法是 webViewDidStartLoad和webViewDidFinishLoad我收到了webViewDidStartLoad,但我不能接受webViewDidFinishLoad的方法.

以下是代码:

@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]);
}

请告诉我出了什么问题.我没有在didFailLoadWithError委托方法中收到任何错误.

注意: - 我加载的文件很大,比如3 MB.

谢谢

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

当我加载非常庞大的文件时,代表是在很长一段时间后才出现的,我无法注意到但是对于小文件,一切都工作正常

Answer 1

嘿,你可能应该这样做,

-(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]
}

在以下UIWebViewDelegate方法中调用removeLoadingView方法

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

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


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

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

showActivityIndi​​cator方法

-(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];
}

removeLoadingView方法

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

Answer 2

那你的webview真的完成了加载吗？你也应该实现webView:didFailLoadWithError:,以捕捉失败.

既然你没有得到失败或成功的消息.您尝试加载的数据可能有问题.

尝试告诉webView加载HTML字符串("Hello World!"),看看是否成功.如果是,那么问题在于您的数据资源或其路径.