如何从 ios 中有多个子视图的超级视图中删除特定子视图

Question

我正在使用循环将多个视图添加到一个视图中。

float contactsContainerX = 6.0f;

UIView *contactsContainer=[[UIView alloc] initWithFrame:CGRectMake(0.0f,4.0f,110.0f,22.0f)];
            contactsContainer.backgroundColor=[UIColor  colorWithRed:213.0f/255.0f green:213.0f/255.0f blue:213.0f/255.0f alpha:1.0f];

UIButton *closeButton = [[UIButton alloc] initWithFrame:CGRectMake(90.0f, 2.0f, 18.0f, 18.0f)];
closeButton.backgroundColor = [UIColor yellowColor];

[closeButton addTarget:self action:@selector(removeFavouriteContact:) forControlEvents:UIControlEventTouchUpInside];
[contactsContainer addSubview:closeButton];

for(int x=0; x<3;x++)
{
   contactsContainer.frame = CGRectMake(contactsContainerX, contactsContainer.frame.origin.y, contactsContainer.frame.size.width, contactsContainer.frame.size.height);
   [self.contactsViewSuperContainers addSubview:contactsContainer];
    contactsContainerX = contactsContainer.frame.origin.x + contactsContainer.frame.size.width+6.0f;
    self.contactsScroller.contentSize =CGSizeMake(contactsContainerX,self.contactsViewSuperContainers.frame.size.height);
}

现在只要我点击按钮。该操作应删除特定的子视图，我 clicked.I 的意思是代码是什么？请帮助我。

-(void) removeFavouriteContact: (UIButton *) sender
{

    for(UIView *subview in self.contactsScroller.subviews)
        if (self.contactsScroller.subviews) 
        {
            //<#statements#>
            //[self.view removeFromSuperview];

        }

}

Answer 1

只使用一行

[[someUIView 子视图] makeObjectsPerformSelector:@selector(removeFromSuperview)];

Answer 2

使用 tag 和 viewWithTag 属性。为您的 view 和 button 设置 tag 并使用 tag 获取 view 然后删除它。

-(void) removeFavouriteContact :(id)sender {
    NSInteger tag = sender.tag;
    UIView *view = [contactsContainer viewWithTag:tag];
    [view removeFromSuperView];
}

Answer 3

考虑到您的 Button 直接添加到您在循环中添加的 View，您可以使用

轻松访问 SuperView in you action

-(void) removeFavouriteContact :(id)sender {
    [[sender superview] removeFromSuperView];
}

上面的代码只有当你的按钮直接添加到视图时才有效，如果不检查添加按钮的级别，在深层你可以只附加 superview 并获得确切的超级视图如下图

[[[[sender superview] superview] superview] removeFromSuperView];

希望对您有所帮助。

干杯。

如何从 ios 中有多个子视图的超级视图中删除特定子视图

how to remove a particular subview from superview which has multiple subviews in ios

ios

objective-c

uiview