MakeAlert()

alert.m

extern UIAlertController *MakeAlert(NSString *title, NSString *message, NSString *cancelText, NSString *confirmText, void (^confirmBlock)(BOOL confirmed));

extern UIAlertController *MakeAlert(NSString *title, NSString *message, NSString *cancelText, NSString *confirmText, void (^confirmBlock)(BOOL confirmed))
{
    UIAlertController *result = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
    
    if (!confirmText) confirmText = NSLocalizedString(@"OK",     nil);
    if (!cancelText)  cancelText  = NSLocalizedString(@"Cancel", nil);

    [result addAction:[UIAlertAction actionWithTitle:cancelText style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
        if (confirmBlock) confirmBlock(NO);
    }]];

    [result addAction:[UIAlertAction actionWithTitle:confirmText style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        if (confirmBlock) confirmBlock(YES);
    }]];

    return result;
}