// init obj
    // Give a picture name
    // Give a picture's height
    // Give a btn's title array
    // Give a title
    // Give a describtion
    // Give a style  two btn | double btn
    // example 1
    [[XTAlertViewController new] showViewWithImage:@"summerxx" imageHeight:188 title:@"This is an introduction" btnTitles:@[@"Cancel", @"Determine"] des:@"A simple and easy to use more version using the controls Copyright © 2016年 夏天然后. All rights reserved." style:AlertDefault fromVC:self];
    // example 2
    XTAlertViewController *xtAlert = [[XTAlertViewController alloc] init];
    [xtAlert showViewWithImage:@"summerxx" imageHeight:188 title:@"This is an introduction" btnTitles:@[@"Cancel", @"Determine", @"Okey"] des:@"A simple and easy to use more version using the controls Copyright © 2016年 夏天然后. All rights reserved." style:AlertDouble fromVC:self];
    xtAlert.delegate = self;

    // Signed an delegate
    @interface ViewController ()<XTAlertControllerDelegate>
    // 
    xt.delegate = self;

- (void)xt_alertViewControllerClickIndex:(NSInteger)buttonIndex
{

    switch (buttonIndex) {
        case 0:
            NSLog(@"0");
            NSLog(@"Cancel");
        break;
        case 1:
            NSLog(@"1");
            NSLog(@"Determine");
        break;
        case 2:
            NSLog(@"2");
            NSLog(@"summerxx");
        break;
        default:
        break;
    }
}