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UIWebView加载Loading的两种方法

2010年11月12日 IT运维 ⁄ 共 1801字 暂无评论 ⁄ 被围观 32+

UIWebView加载Loading的两种方法:

方法1:横屏网页最大宽度不滚屏

以iPhone的尺寸为例,iPad的方法相同

[php]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];
}[/php]

方法2:使用UIAlertView and UIActivityIndicatorView

[php]//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];
}[/php]

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