TYAlertView *alertView = [[TYAlertView alloc] initWithTitle:@"title" message:@"message"];
[alertView addAction:[TYAlertAction actionWithTitle:@"Ok"
                                              style:TYAlertActionStyleDefault
                                            handler:^(TYAlertAction * _Nonnull action) {
    NSLog(@"Ok button clicked");
}]];
[alertView show];

[TYAlertView appearance].titleColor = [UIColor redColor];
[TYAlertView appearance].messageColor = [UIColor redColor];
[TYAlertView appearance].separatorColor = [UIColor grayColor];
[TYAlertView appearance].shadowRadius = 4.0f;
[TYAlertView appearance].popupViewBackgroundColor = [UIColor blueColor];
// Button Title Color
[[TYAlertView appearance] setButtonTitleColor:[UIColor yellowColor]
                               forActionStyle:TYAlertActionStyleDefault
                                     forState:UIControlStateNormal];