UIWebView webViewDidFinishLoad 没有被调用 iOS-移动开发问题

UIWebView webViewDidFinishLoad not getting called iOS(UIWebView webViewDidFinishLoad 没有被调用 iOS)

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问题描述

我正在使用 UIWebView 从文档目录加载一些文件.我已经设置了 UIWebView 的委托，我正在响应 2 种委托方法，即webViewDidStartLoad 和 webViewDidFinishLoad 我收到 webViewDidStartLoad 但我没有收到 webViewDidFinishLoad 方法.

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.

下面是代码:

@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]);
}

请让我知道出了什么问题.我在 didFailLoadWithError 委托方法中没有收到任何错误.

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

注意:- 我正在加载的文件很大，比如 3 MB.

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

谢谢

=============已编辑==================

当我加载非常大的文件时，代理在很长一段时间后才出现，我没有注意到，但对于小文件，一切正常

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

推荐答案

嘿，也许你应该这样做，

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]
}

在以下 UIWebViewDelegate 方法中调用 removeLoadingView 方法

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]);
}

showActivityIndicator 方法

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];
}

removeLoadingView 方法

The removeLoadingView method

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

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