UIAlertController* alert = [UIAlertController alertControllerWithTitle:nil message:@"警告"preferredStyle:UIAlertControllerStyleActionSheet];
    
    [alert addAction:[UIAlertAction actionWithTitle:@"返回" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        //點(diǎn)擊"返回"的回調(diào) Cancel普通返回樣式
    }]];
    [alert addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action)
    {//Destructive 這個(gè)樣式字體會(huì)變紅 看起來(lái)就和重要選擇一樣
        
        [self.deals removeObjectAtIndex:0];
        [self.tableView deleteRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:0 inSection:0]] withRowAnimation:UITableViewRowAnimationFade];
    
    }]];
    //UIAlertController添加方法并且有個(gè)動(dòng)畫
    [self presentViewController:alert animated:YES completion:nil];

 // 添加文本輸入框
    [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {
        textField.placeholder = @"占位字符串";//placeholder 占位符
    }];