Use of WebView in IOS, use of IOSWebView

Use of WebView in IOS, use of IOSWebView

UIWebView is the most common control in iOS sdk. Is a built-in browser control, which can be used to browse webpages, open documents, etc. UIWebView can load html/htm, pdf, docx, txt and other files.
The Safari browser that comes with the system is implemented through UIWebView. Next I will work out how to use webView.

1. Build the UI

 

　　The full name of 2MIME is "Multipurpose Internet Mail Extensions"

Multi-purpose Internet Mail Extension is an internet standard. It was first applied to the email system and later to the browser. here we need to get the MIMIE type of the file. How can we get it? Obtain

-(NSString *) getMimeType :( NSString *) path {// local file path NSURL * url = [NSURL fileURLWithPath: path]; // create a request NSURLRequest * request = [NSURLRequest requestWithURL: url]; NSURLResponse * response; // send a synchronous request to obtain the response type [NSURLConnection sendSynchronousRequest: request returningResponse :( & response) error: nil]; return response. MIMEType ;}

3. Load PDF files

// Monitor all data types: Set the phone number, website address, email, and date to the link text [webView setDataDetectorTypes: UIDataDetectorTypeAll]; // set the file path to be displayed, and obtain the mimeType type NSString * str = [[NSBundle mainBundle] pathForResource: @ "iOS6Cookbook.pdf" ofType: nil]; NSString * mimeType = [self getMimeType: str]; // call the method to load data NSData * data = [NSData dataWithContentsOfFile: str]; [self. webView loadData: data MIMEType: mimeType textEncodingName: @ "UTF-8" baseURL: nil];

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4. Load the txt file.

5. load HTML. Now there is an html file

Load the page, obtain the string, and then display it:

// Monitor all data types: Set the phone number, website address, email, and date to the link text [webView setDataDetectorTypes: UIDataDetectorTypeAll]; // set the file path to be displayed, and obtain the mimeType type NSString * str = [[NSBundle mainBundle] pathForResource: @ "book_v2.html" ofType: nil]; NSString * mimeType = [self getMimeType: str]; // call the method to load data NSData * data = [NSData dataWithContentsOfFile: str]; NSString * htmlStr = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding]; [self. webView loadHTMLString: htmlStr baseURL: nil];

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6. Load URL requests

// Monitor all data types: Set the phone number, url, email, and date to the link text [webView setDataDetectorTypes: UIDataDetectorTypeAll]; NSURL * url = [NSURL URLWithString: @ "http://21-sun.com"]; [self. webView loadRequest: [NSURLRequest requestWithURL: url];

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7. Proxy Method

// Call-(void) webViewDidStartLoad (UIWebView *) webView/call-(void) webViewDidFinishLoad (UIWebView *) when the webpage is loaded *) webView // call when a webpage loading error occurs-(void) webView :( UIWebView) webView didFailLoadWithError :( NSError) error // This method is triggered for every request on the webpage, if NO is returned, this request is not executed (usually used for communication between JS and iOS)-(BOOL) webView :( UIWebView) webView shouldStartLoadWithRequest :( NSURLRequest) request navigationType :( UIWebViewNavigationType) navigationType

 

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Author: Jerry Education
Source: http://www.cnblogs.com/jerehedu/
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