IOS中UIWebView載入Loading的實現方法_IOS

第一種方法：使用UIView and UIActivityIndicatorView

複製代碼 代碼如下:

//建立UIWebView
WebView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 44, 320, 400)];
[WebView setUserInteractionEnabled:NO];
[WebView setBackgroundColor:[UIColor clearColor]];
[WebView setDelegate:self];
[WebView setOpaque:NO];//使網頁透明
NSString *path = @"http://www.baidu.com";
NSURL *url = [NSURL URLWithString:path];
[WebView loadRequest:[NSURLRequest requestWithURL:url]];
//建立UIActivityIndicatorView背底半透明View  
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
[view setTag:103];
[view setBackgroundColor:[UIColor blackColor]];
[view setAlpha:0.8];
[self.view addSubview:view];
activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 32.0f, 32.0f)];
[activityIndicator setCenter:view.center];
[activityIndicator setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhite];
[view addSubview:activityIndicator];
[self.view addSubview:WebView];
[view release];
[WebView release];
//開始載入資料
- (void)webViewDidStartLoad:(UIWebView *)webView {  
      [activityIndicator startAnimating];       
}
//資料載入完
- (void)webViewDidFinishLoad:(UIWebView *)webView {
     [activityIndicator stopAnimating];  
     UIView *view = (UIView *)[self.view viewWithTag:103];
     [view removeFromSuperview];
}

第二種方法：使用UIAlertView and UIActivityIndicatorView

複製代碼 代碼如下:

//載入網頁動畫
- (void)webViewDidStartLoad:(UIWebView *)webView{
    if (myAlert==nil){      
       myAlert = [[UIAlertView alloc] initWithTitle:nil
                                                              message: @"讀取中..."
                                                                delegate: self
                                                 cancelButtonTitle: nil
                                                 otherButtonTitles: nil];
     UIActivityIndicatorView *activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
     activityView.frame = CGRectMake(120.f, 48.0f, 38.0f, 38.0f);
     [myAlert addSubview:activityView];
     [activityView startAnimating];
     [myAlert show];
     }
}
- (void)webViewDidFinishLoad:(UIWebView *)webView{
      [myAlert dismissWithClickedButtonIndex:0 animated:YES];
}

方法三：使用UIWebView來載入gif圖片，除非你要用到webView,不然就不要使用這種方式來實現

複製代碼 代碼如下:

NSData *gif = [NSData dataWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"1" ofType:@"gif"]]; 
// view產生 
UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(100, 100, 70, 30)]; 
webView.userInteractionEnabled = NO;//使用者不可互動 
[webView loadData:gif MIMEType:@"image/gif" textEncodingName:nil baseURL:nil]; 
[self.view addSubview:webView]; 

以上所述就是本文的全部內容了，希望大家能夠喜歡。