DXAlertView *alert = [[DXAlertView alloc] initWithTitle:@"Congratulations" contentText:@"You have bought something" leftButtonTitle:@"Ok" rightButtonTitle:@"Fine"];
[alert show];

alert.leftBlock = ^() {
    NSLog(@"left button clicked");
};
alert.rightBlock = ^() {
    NSLog(@"right button clicked");
};
alert.dismissBlock = ^() {
    NSLog(@"Do something interesting after dismiss block");
};