Mobile SDK iOS: EPZWebView
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Revision as of 21:21, 6 November 2014
Contents |
Overview
The EPZWebView is a UIView that includes a built-in UIWebView that loads and displays web content. It is designed to fill the entire area of its parent container, and has appropriate logic to allow for device rotation. The EPZPromoWebViewController uses an instance of this class for its web view. If you do not wish to use the SDK's built-in EPZPromoWebViewController, you can use an instance of this class, adding it to your own view controller as needed. This view includes basic web view navigation methods and properties that you can use to, for instance, to manage your own toolbar that includes forward/back/refresh buttons for the web view.
Tasks
Setting and Getting the Delegate
delegate property
Loading content
- loadURL:
Retrieving web page URL
currentURL property
Navigating the web view
isLoading property
canGoBack property
canGoForward property
- reload
- goBack
- goForward
Properties
delegate
The receiver's delegate.
@property (nonatomic, assign) id <EPZWebViewDelegate> delegate
Discussion
The delegate is sent messages when the view is created, as well as when it is targeted to close. See EPZWebViewDelegate for methods this delegate implements.
Declared In
EPZWebView.h
isLoading
Flag for whether or not the web view is in the act of loading content.
@property (nonatomic, readonly) BOOL isLoading
Declared In
EPZWebView.h
canGoBack
Flag for whether or not the web view can navigate back.
@property (nonatomic, readonly) BOOL canGoBack
Declared In
EPZWebView.h
canGoForward
Flag for whether or not the web view can navigate forward.
@property (nonatomic, readonly) BOOL canGoForward
Declared In
EPZWebView.h
currentURL
The current URL that is loaded in the web view.
@property (nonatomic, readonly) NSString *currentURL
Declared In
EPZWebView.h
Instance Methods
loadURL:
Initializes and returns a newly allocated view object with the specified items from the options.
- (void) loadURL:(NSString *)url
Parameters
- url
- The URL to load into the web view.
Discussion
This method must be called to load a URL into the web view. If not called, the web view will be left with a blank request and nothing will be shown.
Declared In
EPZWebView.h
reload
Method to reload the current web page.
- (void) reload
Discussion
This method can be called to reload the current web page.
Declared In
EPZWebView.h
goBack
Method to navigate back in the web view, if possible.
- (void) goBack
Discussion
This method can be called to navigate back in the web view, if possible.
Declared In
EPZWebView.h
goForward
Method to navigate forward in the web view, if possible.
- (void) goForward
Discussion
This method can be called to navigate forward in the web view, if possible.
Declared In
EPZWebView.h
stringByEvaluatingJavaScriptFromString:
Returns the result of running a script.
- (NSString *) stringByEvaluatingJavaScriptFromString:(NSString *)script
Returns
The result of running script or nil if it fails.
Discussion
JavaScript allocations are limited to 10 MB. The web view raises an exception if you exceed this limit on the total memory allocation for JavaScript.
Declared In
EPZWebView.h
