uiwebview

来源：互联网发布：穆雅斓淘宝店铺改名了? 编辑：程序博客网时间：2024/06/08 17:47

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=[NSURLURLWithString:path];
[WebView loadRequest:[NSURLRequestrequestWithURL:url]];

//创建UIActivityIndicatorView背底半透明View
UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
[viewsetTag:103];
[viewsetBackgroundColor:[UIColor blackColor]];
[viewsetAlpha:0.8];
[self.viewaddSubview:view];

activityIndicator =[[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(0.0f, 0.0f, 32.0f, 32.0f)];
[activityIndicator setCenter:view.center];
[activityIndicator setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhite];
[viewaddSubview:activityIndicator];
[self.viewaddSubview:WebView];
[viewrelease];
[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.viewviewWithTag:103];
     [viewremoveFromSuperview];
}
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: @"正在讀取網路資料"delegate:self
                                                 cancelButtonTitle:nil
                                                 otherButtonTitles:nil];

     UIActivityIndicatorView *activityView =[[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
     activityView.frame= CGRectMake(120.f, 48.0f, 37.0f, 37.0f);
     [myAlert addSubview:activityView];
     [activityView startAnimating];
     [myAlert show];
     }
}

-(void)webViewDidFinishLoad:(UIWebView *)webView{
      [myAlert dismissWithClickedButtonIndex:0 animated:YES];

}

/*=======================================*/

用法一：只显示不停旋转的进度滚轮指示器。

//显示进度滚轮指示器

-(void)showWaiting {

progressInd=[[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:

UIActivityIndicatorViewStyleWhiteLarge];

progressInd.center=CGPointMake(self.view.center.x,240);

[self.navigationController.view addSubview:progressInd];

[progressInd startAnimating];

}

//消除滚动轮指示器

-(void)hideWaiting

{

[progressInd stopAnimating];

}

用法二：带有半透明背景的进度轮指示器。

//显示进度滚轮指示器

-(void)showWaiting:(UIView *)parent {

int width = 32, height = 32;

CGRect frame = CGRectMake(100, 200, 110, 70) ;//[parent frame]; //[[UIScreen mainScreen] applicationFrame];

int x = frame.size.width;

int y = frame.size.height;

frame = CGRectMake((x - width) / 2, (y - height) / 2, width, height);

UIActivityIndicatorView* progressInd = [[UIActivityIndicatorView alloc]initWithFrame:frame];

[progressInd startAnimating];

progressInd.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;

frame = CGRectMake((x - 70)/2, (y - height) / 2 + height, 80, 20);

UILabel *waitingLable = [[UILabel alloc] initWithFrame:frame];

waitingLable.text = @"Loading...";

waitingLable.textColor = [UIColor whiteColor];

waitingLable.font = [UIFont systemFontOfSize:15];

waitingLable.backgroundColor = [UIColor clearColor];

frame = CGRectMake(100, 200, 110, 70) ;//[parent frame];

UIView *theView = [[UIView alloc] initWithFrame:frame];

theView.backgroundColor = [UIColor blackColor];

theView.alpha = 0.7;

[theView addSubview:progressInd];

[theView addSubview:waitingLable];

[progressInd release];

[waitingLable release];

[theView setTag:9999];

[parent addSubview:theView];

[theView release];

}

//消除滚动轮指示器

-(void)hideWaiting

{

[[self.view viewWithTag:9999] removeFromSuperview];

}

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