AP102 2016/5/9 alert 克凡

- (IBAction)clicked {
//  preferredStyle:UIAlertControllerStyleActionSheet
//  這是顯示下面四行
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleActionSheet];

//  preferredStyle:UIAlertControllerStyleActionSheet
//  這是顯示在中間
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleAlert];

   //第一個選項
    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil];
    //第二個選項
    UIAlertAction *ok2Action = [UIAlertAction actionWithTitle:@"OK2" style:UIAlertActionStyleDefault handler:nil];

    //取消按鈕UIAlertActionStyleCancel 
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:nil];

    //呼叫方法
    [alertController addAction:okAction];
    [alertController addAction:ok2Action];
    //呼叫取消方法
    [alertController addAction:cancelAction];
    //顯示
    [self presentViewController:alertController animated:YES completion:nil];

}