Objective C Calling Method on Another Class

Question

I have 2 classes, MainViewController and 'FooView' for example.

In MainViewController I have a method called -(void)doSearch

I'm trying to call doSearch from Foo, is see in the log "doSearch" (NSLog) but the UIWebView doesn't response.

Foo

MainViewController *mainVc = [[MainViewController alloc] init];
[mainVc doSearch];

MainViewController


- (void)doSearch {
    NSLog(@"doSearch");
    [myWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.google.com/"]]];
}

myWebView is a UIWebView.

Thanks,

Guy Dor

Have a look at this http://stackoverflow.com/questions/5868511/reaching-a-function-in-a-different-class — Jens Bergvall, Jul 26 '11 at 13:34
You are not using the correct objects i suppose. Post how you create the views and how you access the objects. — Praveen S, Jul 26 '11 at 13:36
Non of them is null, I tried initWithNibName and still no response from the UIWebView — , Jul 26 '11 at 13:41

score 0 · Answer 1 · answered Jul 26 '11 at 13:32

0

Check if "mainVc" is not nil. You are probably falling at initializing it.

answered Jul 26 '11 at 13:32

Rui Peres

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Try this: MainViewController *mainVc = [[MainViewController alloc] initWithNibName:@"MainViewController" bundle:nil]; – Rui Peres Jul 26 '11 at 13:36

score 0 · Accepted Answer · answered Jul 26 '11 at 13:37

I think something is nil here. In Obj-C you can send messages (call methods) on a nil object without an error or exception. In your case, your MainViewController could be null in the FooView, or it is possible that something in that method is nil. For example, if have a xib file for that view controller, then it needs to be loaded with initWithNibName:bundle:. If you don't do that, then the IBOutlets will be nil (possibly the myWebView in your doSearch: method for example).

score 0 · Answer 3 · answered Jul 26 '11 at 13:55

0

if u create MainViewController with NIB file then u have to call like this.

  MainViewController *mainVc = [[MainViewController alloc]initWithNibName:@"MainViewController" bundle:nil];

  [mainVc doSearch];

answered Jul 26 '11 at 13:55

Vijay-Apple-Dev.blogspot.com

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Thanks but if I init a MainViewController with initWithNibName I actually recreate my entire interface because under this method I add some views to the xib file – Jul 26 '11 at 15:13

Objective C Calling Method on Another Class

3 Answers3

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