显示进度条,直到它在UIWebView IOS7中加载数据 [英] Show progress bar until it load the data in UIWebView IOS7
问题描述
在我的应用程序中,我有 UIWebView
,它使用URL加载 pdf
文件,它的文件非常大加载的时间很长。现在我想要显示喜欢其加载进度的用户,直到我的文件加载后加载我的pdf已隐藏进度条,我该如何实现?
Hi in my application i have UIWebView
which loads the pdf
file using URL its very large file its taking too much time to load. Now i want show the user that like its loading progress until it get load the my pdf once my file loaded its has hide the progress bar, how can I achieve this?
我的网页视图代码。
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *pdf =@"http://jesusredeems.com/mag/pdf/JRE-2014-03.pdf";
NSURL *url = [NSURL URLWithString:pdf];
NSURLRequest *myRequest = [NSURLRequest requestWithURL:url];
[webview loadRequest:myRequest];
}
我正在使用上面的代码加载我的 pdf
,如何使用进度条进行文件加载?
I'm using the above code to load my pdf
, how I can use the progress bar for file loading?
推荐答案
你应该在webview委托方法中启动/停止进度条。
You should start/stop the progressbar in webview delegate methods.
在 viewDidLoad
中添加以下行。
webview.delegate = self;
在控制器中添加以下功能......
Add following functions in your controller...
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
//Start the progressbar..
return YES;
}
-(void)webViewDidFinishLoad:(UIWebView *)webView
{
//Stop or remove progressbar
}
-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
//Stop or remove progressbar and show error
}
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