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网络等待indicator的界面设置

UIWebView加载Loading...两种方法

  第一种方法:使用UIView and UIActivityIndicatorView

  //创建UIWebView

  WebView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 44, 320, 400)];

  [WebView setUserInteractionEnabled:NO];

  [WebView setBackgroundColor:[UIColor clearColor]];

  [WebView setDelegate:self];

  [WebView setOpaque:NO];//使网页透明

  NSString *path = @"http://www.baidu.com";

  NSURL *url = [NSURL URLWithString:path];

  [WebView loadRequest:[NSURLRequest requestWithURL:url]];

  //创建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];

  //开始加载数据

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

  [activityIndicator startAnimating];

  }

  //数据加载完

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

  [activityIndicator stopAnimating];

  UIView *view = (UIView *)[self.view viewWithTag:103];

  [view removeFromSuperview];

  }

  第二种方法:使用UIAlertView and UIActivityIndicatorView

  //加载网页动画

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

  if (myAlert==nil){

  myAlert = [[UIAlertView alloc] initWithTitle:nil

  message: @"读取中..."

  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];

  }

posted on 2012-03-04 20:37  pengyingh  阅读(200)  评论(0编辑  收藏  举报

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