Make UIAlertView blocking

Question

I need make UIAlertView blocking. Because i have function and i need to return UIAlertView choice. But problem is that after UIAlertView

Answer 1

I just found this question by accident and even by entering Apple hell by posting this, I hereby proclaim this as a proof of concept:

@interface EvilShitClass () 
@end

@implementation EvilShitClass {
    BOOL _isCanceled, _wasYes;
}

Here is the static method for a yes/no query:

+ (BOOL)yesNoQueryWithTitle:(NSString*)title text:(NSString*)text {

    EvilShitClass *shit = [EvilShitClass new];
    UIAlertView *alertView = [UIAlertView new];
    alertView.delegate = shit;
    alertView.title = title;
    alertView.message = text;
    [alertView addButtonWithTitle:@"Yes"];
    [alertView addButtonWithTitle:@"No"];

    NSRunLoop *run_loop = [NSRunLoop currentRunLoop];

    [alertView show];

    while( !shit->_isCanceled ) {
        BOOL tmp = [run_loop runMode:NSDefaultRunLoopMode beforeDate:[NSDate date]];
    }

    return shit->_wasYes;
}

and finally the delegate method for handling the button click and stop the runloop-processing:

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    _wasYes = (buttonIndex == 0);
    _isCanceled = YES;
}

This works but remember: you shouldn't do it this way :-D Pretty please don't argue about style and stuff, it's just a 5 minutes quick hack to proof it can be done! This should work without ARC (new -> autorelease) but if I'm wrong you know how to handle it ;)

Disclaimer: I'm not responsible for any possible damage the use of this snippet could do to your application or devices. Thank you.