Iphone UIWebView webViewDidFinishLoad未调用iOS

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，我正在响应两种委托方法，即

webViewDidFinishLoad

和

webViewDidFinishLoad

我正在接收

webViewDidFinishLoad

但我没有接收

webViewDidFinishLoad

方法

代码如下：

@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]);
}

@接口MyView:UIViewController{
UIWebView*webView；
}
@属性（非原子，保留）UIWebView*webView；
=====================================课堂===========================
-（无效）viewDidLoad{
CGRect webFrame=[[UIScreen mainScreen]applicationFrame]；
mWebView=[[UIWebView alloc]initWithFrame:webFrame]；
mWebView.delegate=self；
mWebView.scalesPageToFit=是；
[self.view addSubview:mWebView]；
NSString*path=[DocumentsDirectoryStringByAppendingPathComponent:[NSString stringWithFormat:@“%@”，pathString]]；
[mWebView加载请求：[NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]]；
}
//委托方法
-（void）webView加载：（UIWebView*）webView{
NSLog（@“开始”）；
}   
-（无效）webViewDidFinishLoad:（UIWebView*）webView{
NSLog（@“完成”）；
}
-（void）webView:（UIWebView*）webView失败加载错误：（NSError*）错误{
NSLog（@“网络视图错误：%@，[错误说明]）；
}

请告诉我出了什么问题。我在DidFailLoadRor委托方法中没有得到任何错误

注意：-我正在加载的文件很大，比如说3MB

谢谢

====================================================

---

当我加载非常大的文件时，代理经过了很长的时间才出现，我没有注意到，但是对于小文件，一切正常

可能是遇到了错误。实现

–webView:didFailLoadWithError:

并检查。

那么，您的webView真的完成了加载吗？您还应该实现

webView:didFailLoadWithError:

，以捕获失败

因为你没有得到失败或成功的信息。您试图加载的数据可能有问题

---

尝试告诉webView加载一个HTML字符串（“Hello World！”），看看是否成功。如果是这样，那么问题在于您的数据资源或其路径。

嘿，也许您应该这样做

-(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]);
}

showActivityIndicator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];
}

WebView代理

下载MBProgessHUD

添加到您的项目中

当页面开始加载（*）时，程序开始并在页面加载成功后隐藏

---

.h文件

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

   }

- (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];
}

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

 -(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;
}

---

确保在视图的.h文件中实现委托（），并将委托连接到视图。这为我修复了它。

.h文件

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

   }

- (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];
}

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

 -(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;
}

.m文件

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

   }

- (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];
}

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

 -(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;
}

---

您还可以通过追加PathComponent:[NSString stringWithFormat:@“%@”，pathString]]来减少

NSString*路径=[DocumentsDirectoryStringByAppendingPathComponent]

to

NSString*path=[DocumentsDirectoryStringByAppendingPathComponent:pathString]我已经实现了这个错误，但它没有进入该方法。我将编辑我的问题好吧，到底发生了什么？webview是否成功加载内容？webview是否成功加载内容。但由于我正在显示非常大的文件，比如说3MB，这需要很多时间。所以我想向用户展示一些进展，但由于我无法调用正确的委托方法，因此我无法这样做。如果没有调用完成/失败的委托方法，则会出现问题…如果在webview中加载一小段数据，您是否仍然无法获得其中任何一个，就像一个简单的html字符串？因为我上传了一个非常大的文件。代表花了太多时间，我没有注意到。对于小文件，一切正常。谢谢你的帮助@CharlieMezak:-谢谢你指出缺陷。