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IOS中UIWebView加載Loading的實(shí)現(xiàn)方法

更新時間：2015年05月27日 11:46:01 投稿：hebedich

最近有朋友問我類似微信語音播放的喇叭動畫和界面圖片加載loading界面是怎樣實(shí)現(xiàn)的，是不是就是一個gif圖片呢！我的回答當(dāng)然是否定了，當(dāng)然不排除也有人用gif圖片啊！

第一種方法：使用UIView and UIActivityIndicatorView

//創(chuàng)建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(wǎng)頁透明
NSString *path = @" NSURL *url = [NSURL URLWithString:path];
[WebView loadRequest:[NSURLRequest requestWithURL:url]];
//創(chuàng)建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];
//開始加載數(shù)據(jù)
- (void)webViewDidStartLoad:(UIWebView *)webView {
      [activityIndicator startAnimating];
}
//數(shù)據(jù)加載完
- (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

復(fù)制代碼代碼如下:

//加載網(wǎng)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來加載gif圖片，除非你要用到webView,不然就不要使用這種方式來實(shí)現(xiàn)

復(fù)制代碼代碼如下:

NSData *gif = [NSData dataWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"1" ofType:@"gif"]];  

// view生成  

UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(100, 100, 70, 30)];  

webView.userInteractionEnabled = NO;//用戶不可交互  

[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(nèi)容了，希望大家能夠喜歡。

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