iOS UIActionSheet的使用

- (IBAction)logout:(id)sender {
UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"确定要注销?" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"确定" otherButtonTitles:nil, nil];
[sheet showInView:self.view];
}

//必须要让控制器遵守UIActionSheetDelegate代理

#pragma mark - actionsheet的代理方法
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
//通过buttonIndex的值来确定点击的是第几个
if (buttonIndex ＝＝ 0){

}