ios - objc_msgSend EXC_BAD_ACCESS 使用关闭按钮时

Question

在我的项目中，我在右上角添加了一个关闭按钮，如下所示:

int closeBtnOffset = 10;
UIImage* closeBtnImg = [UIImage imageNamed:@"popupCloseBtn.png"];
UIButton* closeBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[closeBtn setImage:closeBtnImg forState:UIControlStateNormal];
[closeBtn setFrame:CGRectMake( background.frame.origin.x + background.frame.size.width - closeBtnImg.size.width - closeBtnOffset, 
                               background.frame.origin.y ,
                               closeBtnImg.size.width + closeBtnOffset, 
                               closeBtnImg.size.height + closeBtnOffset)];
[closeBtn addTarget:self action:@selector(closePopupWindow) forControlEvents:UIControlEventTouchUpInside];
[bigPanelView addSubview: closeBtn];

closePopupWindw 方法如下所示:

-(void)closePopupWindow
{
    //remove the shade
    [[bigPanelView viewWithTag: kShadeViewTag] removeFromSuperview];
    [self performSelector:@selector(closePopupWindowAnimate) withObject:nil afterDelay:0.1];

}

构建成功，但当我单击 closeBtn 按钮时，程序关闭并显示以下消息:http://i45.tinypic.com/ddndsl.png

我认为代码没有任何问题，因为我从另一个项目复制了它并且在那里运行良好，但在另一个项目中他们没有使用 ARC，我不确定这是否是问题所在。

编辑:

-(void)closePopupWindowAnimate
{

    //faux view
    __block UIView* fauxView = [[UIView alloc] initWithFrame: CGRectMake(10, 10, 200, 200)];
    [bgView addSubview: fauxView];

    //run the animation
    UIViewAnimationOptions options = UIViewAnimationOptionTransitionFlipFromLeft |
    UIViewAnimationOptionAllowUserInteraction    |
    UIViewAnimationOptionBeginFromCurrentState;

    //hold to the bigPanelView, because it'll be removed during the animation

    [UIView transitionFromView:bigPanelView toView:fauxView duration:0.5 options:options completion:^(BOOL finished) {

        //when popup is closed, remove all the views
        for (UIView* child in bigPanelView.subviews) {
            [child removeFromSuperview];
        }
        for (UIView* child in bgView.subviews) {
            [child removeFromSuperview];
        }

        [bgView removeFromSuperview];

    }];
}

Answer 1

您正在访问已经释放的对象，使用属性总是个好主意，并将属性类型设置为 strong(使用 ARC)以便它们可以保留只要您的 View 处于事件状态，就放在内存中。

将您的 UIButton 声明为类属性，它将解决您的问题。您还应该看到您的按钮已添加到 bigPanelView 上，并且您在调用方法 closePopupWindowAnimate

之前删除了此 View