UIWebView加载Loading...

ViewController.h文件

#import <UIKit/UIKit.h>

@interface ViewController :UIViewController<UIWebViewDelegate>//加载声明UIWebviewDelegate协议  

{

   UIWebView *webView;

   UIActivityIndicatorView *activityIndicator;

    

}

ViewController.m文件

//加载网页

- (void)viewDidLoad

{

    [superviewDidLoad];

    webView = [[UIWebViewalloc] initWithFrame:CGRectMake(0,0, 320,480)];

    [webViewsetDelegate:self];

    NSURLRequest *request =[NSURLRequestrequestWithURL:[NSURLURLWithString:@"http://www.zqksk.com/ios/xzqcf/index.html"]];

    [self.viewaddSubview: webView];

    [webViewloadRequest:request];

    

   }

/////////////////////////////////////////////////开始加载数据  

- (void) webViewDidStartLoad:(UIWebView *)webView

{

    //创建UIActivityIndicatorView背底半透明View     

   UIView *view = [[UIViewalloc] initWithFrame:CGRectMake(0,0, 320, 480)];  

    [viewsetTag:108];  

    [view setBackgroundColor:[UIColorblackColor]];  

    [viewsetAlpha:0.5];  

    [self.viewaddSubview:view];  

    

    activityIndicator = [[UIActivityIndicatorViewalloc] initWithFrame:CGRectMake(0.0f,0.0f, 32.0f, 32.0f)];  

    [activityIndicatorsetCenter:view.center];  

    [activityIndicatorsetActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhite];  

    [view addSubview:activityIndicator];  

    [activityIndicatorstartAnimating];

    NSLog(@"webViewDidStartLoad");

}

/////数据加载完  

- (void) webViewDidFinishLoad:(UIWebView *)webView

{

    [activityIndicatorstopAnimating];

   UIView *view = (UIView*)[self.viewviewWithTag:108];

    [view removeFromSuperview];

    NSLog(@"webViewDidFinishLoad");

}

- (void) webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error

{

    [activityIndicatorstopAnimating];

   UIView *view = (UIView*)[self.viewviewWithTag:108];

    [view removeFromSuperview];

    NSLog(@"didFailLoadWithError:%@", error);

}

////自己使用以下方式：

//加载网页动画 

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

    

   if (myAlert==nil){

        myAlert = [[UIAlertViewalloc] initWithTitle:nil

                                            message: @"正在玩命加载当中..."

                                           delegate: self

                                  cancelButtonTitle: nil

                                  otherButtonTitles: nil];

        

        UIActivityIndicatorView *activityView = [[UIActivityIndicatorViewalloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];//加载时指示器的颜色

        activityView.frame =CGRectMake(120.f,48.0f, 37.0f,37.0f);//设置对象的位置，大小是固定不变的。WhiteLarge为37 * 37，White为20 * 20

        activityView.color = [UIColor redColor];//指示器的颜色

        [myAlertaddSubview:activityView];//将对像加入到VIEW

        [activityViewrelease];////要记得将对象release

        [activityViewstartAnimating];//开启动画（指示器）

        [myAlertshow];

    }

    

    _reloading = YES;

}

////数据加载完 

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

     [myAlertdismissWithClickedButtonIndex:0animated:YES];

    

    _reloading = NO;

    [_refreshHeaderViewegoRefreshScrollViewDataSourceDidFinishedLoading:self.uiWebView.scrollView];

}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {

    NSLog(@"load page error:%@", [errordescription]);

    _reloading = NO;

[_refreshHeaderViewegoRefreshScrollViewDataSourceDidFinishedLoading:self.uiWebView.scrollView];

}

转：

http://justcoding.iteye.com/blog/1535070

http://lijinfengjava.iteye.com/blog/1508377

http://blog.sina.com.cn/s/blog_7fa6b06f010121mr.html