IOS WebView The answer to the question you need

UIWebView you can load and display a Web page for a URL, or you can display a local HTML-based page or some Web page:

A. Load URL

2. WebView = [[UIWebView alloc] Initwithframe:cgrectmake (0, 44, 320, 400)];
4. nsstring *path = @"http://www.baidu.com";
6. Nsurl *url = [Nsurl Urlwithstring:path];
8. [WebView loadrequest:[nsurlrequest Requestwithurl:url];

B. Loading HTML

nsbundle *bundle = [NSBundle mainbundle];
NSString *respath = [bundle ResourcePath];
NSString *filepath = [respathstringbyappendingpathcomponent:@ "home.html"];
[WebView Loadhtmlstring:[nsstringstringwithcontentsoffile:filepath]
Baseurl:[nsurlfileurlwithpath:[bundle Bundlepath]];

Second, the use of Web page loading instructions, loading completed and then display the page out

The first thing to specify is the delegate method:

WebView. delegate = self;

UIWebView has the following principal methods:

1,-(void) Webviewdidstartload: (UIWebView *) WebView; The method is executed when the load is started.
2,-(void) Webviewdidfinishload: (UIWebView *) WebView; The method is executed when the load is complete.
3,-(void) WebView: (UIWebView *) WebView didfailloadwitherror: (nserror*) error; The method is executed when the load error occurs.

This allows you to implement this functionality using the Webviewdidstartload and Webviewdidfinishload methods:

2. -(void) Webviewdidstartload: (UIWebView *) WebView
4. {
6. //Create Uiactivityindicatorview back-bottom translucent view
8. UIView *view = [[UIView alloc] Initwithframe:cgrectmake (0, 0, 320, 480)];
10. [View settag:108];
12. [View Setbackgroundcolor:[uicolor Blackcolor];
14. [View setalpha:0.5];
16. [Self.view Addsubview:view];
20. Activityindicator = [[Uiactivityindicatorview alloc] Initwithframe:cgrectmake (0.0f, 0.0f, 32.0f, 32.0f)];
22. [Activityindicator SetCenter:view.center];
24. [Activityindicator Setactivityindicatorviewstyle:uiactivityindicatorviewstylewhite];
26. [View Addsubview:activityindicator];
30. [Activityindicator startanimating];
32. }
34. -(void) Webviewdidfinishload: (UIWebView *) WebView
36. {
38. [Activityindicator stopanimating];
40. UIView *view = (uiview*) [Self.view viewwithtag:108];
42. [View Removefromsuperview];
44. NSLog (@"webviewdidfinishload");
46. }

UIWebView can also execute JavaScript code through the Stringbyevaluatingjavascriptfromstring function, allowing for more flexibility in working with Web page files

1. Get the title of UIWebView
NSString *thetitle=[webviewstringbyevaluatingjavascriptfromstring:@ "Document.title"];

2. Get the URL of the page

Nsstring*currenturl = [webviewstringbyevaluatingjavascriptfromstring:@ "Document.location.href"];

3. Modifying the value of a page element

Nsstring*js_result = [webviewstringbyevaluatingjavascriptfromstring:@ "Document.getelementsbyname (' Q ') [0].value=] Zhu Qilin '; "];

4. Form submission

NSSTRING*JS_RESULT2 = [webviewstringbyevaluatingjavascriptfromstring:@ "Document.forms[0].submit ();"]

Four, the comprehensive use of the above methods, but also to achieve the display of some Web pages, the basic ideas are as follows:

1. Use Loadrequest to get the webpage first, but set uiwebview.hidden = YES first;

2. In Webviewdidfinishload, use

NSSTRING*JS_RESULT2 = [webviewstringbyevaluatingjavascriptfromstring:@ "document.getelementbyidx_x_x_xx_x_x (' xxxx '). InnerHTML; "] Gets the HTML code for the specified label element3. Then use loadhtmlstring to load the HTML code and

IOS WebView The answer to the question you need