setting delegate of a custom class

Question

hi,

i am working in creating a custom class which is subclass of UIWebview. But its delegate functions are not being called. How should i set delegate for this class. I know this is a basic question but it will be really good if some one could answer it. Thanks in advance.

My Code:

.h file

@interface PollackWebView : UIWebView<UIWebViewDelegate> {



}

-(id)initWebview:(CGRect)frame;
@end

.m file:

@implementation PollackWebView


-(id)initWebview:(CGRect)frame {

    if ((self = [super initWithFrame:frame])) {

    }
    return self;
}

-(void)SetMyDelegate {

    self.delegate = self;

}


- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {

    NSLog(@"shouldStartLoadWithRequest");
    if ( navigationType == UIWebViewNavigationTypeLinkClicked ) {

        // do something with [request URL]
        return NO;
    }

    return TRUE;

}

- (void)webViewDidStartLoad:(UIWebView *)webView {

    NSLog(@"webViewDidStartLoad");

}

Answer 1

Your class inherits the delegate instance variable from UIWebView. Setting the delegate works exactly the same way. Create a controller class that implements the UIWebViewDelegate protocol and the methods you need. Then instantiate the controller class and assign it using the delegate property.

Answer 2

I think what your trying to do, you don't need a subclass. In the code you posted you have only used delegate methods, so instead of creating a subclass:

• Just use a normal UIWebView.
• In the class that creates and makes visible the webview, set the UIWebView's delegate to self just after you Alloc/init the UIWebView.
• Then in the header of the class that creates/makes visible the webview add <UIWebViewDelegate> to the end of the @interface line, just before the {
• Then put the delegate methods in the class's implementation.