IOS中UIWebView加载Loading的实现方法
第一种方法：使用UIViewandUIActivityIndicatorView
//创建UIWebView
WebView=[[UIWebViewalloc]initWithFrame:CGRectMake(0,44,320,400)];
[WebViewsetUserInteractionEnabled:NO];
[WebViewsetBackgroundColor:[UIColorclearColor]];
[WebViewsetDelegate:self];
[WebViewsetOpaque:NO];//使网页透明
NSString*path=@"http://www.baidu.com";
NSURL*url=[NSURLURLWithString:path];
[WebViewloadRequest:[NSURLRequestrequestWithURL:url]];
//创建UIActivityIndicatorView背底半透明View
UIView*view=[[UIViewalloc]initWithFrame:CGRectMake(0,0,320,480)];
[viewsetTag:103];
[viewsetBackgroundColor:[UIColorblackColor]];
[viewsetAlpha:0.8];
[self.viewaddSubview:view];
activityIndicator=[[UIActivityIndicatorViewalloc]initWithFrame:CGRectMake(0.0f,0.0f,32.0f,32.0f)];
[activityIndicatorsetCenter:view.center];
[activityIndicatorsetActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhite];
[viewaddSubview:activityIndicator];
[self.viewaddSubview:WebView];
[viewrelease];
[WebViewrelease];
//开始加载数据
-(void)webViewDidStartLoad:(UIWebView*)webView{
[activityIndicatorstartAnimating];
}
//数据加载完
-(void)webViewDidFinishLoad:(UIWebView*)webView{
[activityIndicatorstopAnimating];
UIView*view=(UIView*)[self.viewviewWithTag:103];
[viewremoveFromSuperview];
}
第二种方法：使用UIAlertViewandUIActivityIndicatorView
//加载网页动画
-(void)webViewDidStartLoad:(UIWebView*)webView{
if(myAlert==nil){
myAlert=[[UIAlertViewalloc]initWithTitle:nil
message:@"读取中..."
delegate:self
cancelButtonTitle:nil
otherButtonTitles:nil];
UIActivityIndicatorView*activityView=[[UIActivityIndicatorViewalloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
activityView.frame=CGRectMake(120.f,48.0f,38.0f,38.0f);
[myAlertaddSubview:activityView];
[activityViewstartAnimating];
[myAlertshow];
}
}
-(void)webViewDidFinishLoad:(UIWebView*)webView{
[myAlertdismissWithClickedButtonIndex:0animated:YES];
}
方法三：使用UIWebView来加载gif图片，除非你要用到webView,不然就不要使用这种方式来实现
NSData*gif=[NSDatadataWithContentsOfFile:[[NSBundlemainBundle]pathForResource:@"1"ofType:@"gif"]]; //view生成 UIWebView*webView=[[UIWebViewalloc]initWithFrame:CGRectMake(100,100,70,30)]; webView.userInteractionEnabled=NO;//用户不可交互 [webViewloadData:gifMIMEType:@"image/gif"textEncodingName:nilbaseURL:nil]; [self.viewaddSubview:webView];
以上所述就是本文的全部内容了，希望大家能够喜欢。