iPhone:从NSMutableArray中删除图像

我正在创建一个应用程序，其中我将

UIImage

存储在

NSMutableArray

    -(void)mainImageSelected: (id)sender
{    
    mainImageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:[NSString stringWithFormat:@"image%d.png",[sender tag]]]];
    [myArray addObject:mainImageView];
}

现在，我想在用户触摸的地方显示这个图像。我正在做这样的事情：

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint point = [touch locationInView:self.view];

    if ([currentObject isEqualToString:@"myObject"])
    {
            NSLog(@"Hello World");
            [self.view addSubview:[myArray lastObject]];
            [[myArray lastObject]setCenter:point];
    }
}

-(IBAction)Undo
{
    [myArray removeLastObject];
}

到目前为止，它还可以正常工作，但问题是，当用户按下“撤消”按钮时，我想删除此图像。为此，我做了如下工作：

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint point = [touch locationInView:self.view];

    if ([currentObject isEqualToString:@"myObject"])
    {
            NSLog(@"Hello World");
            [self.view addSubview:[myArray lastObject]];
            [[myArray lastObject]setCenter:point];
    }
}

-(IBAction)Undo
{
    [myArray removeLastObject];
}

---

它正在从阵列中删除对象，但未删除/删除图像。请任何人解决此问题。

在将图像从阵列中删除之前，您还应将其从视图中删除：

-(IBAction)decorationUndo
{
    [decorationArray removeLastObject];
    [self.view.subviews removeLastObject];
    [self setNeedsDisplay];
}

 -(IBAction)decorationUndo
{
  [[myArray lastObject] removeFromSuperview];
  [myArray removeLastObject];
}

---

在上面的代码中，我假设

decorationArray

是一个包含图像的

UIImageView

对象数组。

在从数组中删除它之前，首先从视图中删除它

-(IBAction)Undo
{
    [[myArray lastObject] removeFromSuperview];
    [myArray removeLastObject];
}

---

“装饰雷”的内容是什么？哎呀！对不起，那是个错误！！[更新]