Redrawing a view in ios

Question

Is it possible to redraw the whole view.

I need it to complete my language settings. The problem is that the language only changes after the views there drawn again. Like you go out of settings and then go in again, then the language is changed. But the moment you save everything, the language stays the same.

So how should i redraw my views, or by best the whole app, after the language change was found?

Answer 1

In ARC:

- (void)setLanguage:(LanguageType)languageType
{
    _language = languageType;

    //TODO:your settings

    [_theWholeView setNeedsDisplay];
}

If that can not work , there is a very troublesome solution , it can reload the whole view.

You can code like this: In the view.h , you need creat a delegate. @protocol WholeViewDelegate

- (void)reloadData;

@end

In the view.m

- (void)setLanguage:(LanguageType)languageType
{
    _language = languageType;

    //TODO:your settings

    [_delegate reloadData];
}

In the controller you need to implement the delegate In the controller.m

- (void)reloadData
{
    if(_wholeView)
    {
        [_wholeView removeFromSuperview];
    }
    // in the wholeView init method you should refresh your data
    _wholeView = [[WholeView alloc] init];
    self.view addSubview:_wholeView
}

Answer 2

Yes. Call [UIView setNeedsDisplay] (reference).