ios - UIPopOverControl 和 UIImageView

Question

我创建了一个 UIButton 和 UIImageView，其中按钮框架设置为与图像框架大小相同。我愿意做的是，一旦我触摸图像，它应该PopOver。按钮设置为 Action 。问题是，一旦我触摸它，它就只显示图像，而不是弹出。

我的代码有什么问题吗？

- (void)viewDidLoad {
    [super viewDidLoad];    
    UIImageView *imageView=[[UIImageView alloc] initWithFrame:CGRectMake(10, 10,100, 100)]; 
    imageView.image=[UIImage imageNamed:@"abc.jpg"];    
    [self.view addSubview:imageView];          
    imageView.userInteractionEnabled = YES;  
    UIButton *imageButton = [[UIButton alloc]init];
    [imageButton setFrame:CGRectMake(0, 0, 100, 100)];
    [imageButton addTarget:self action:@selector(imageTapped:) forControlEvents:UIControlEventTouchUpInside];
    [imageView addSubview:imageButton];
    [imageButton release];
    [imageView release];     
}


-(void)imageTapped:(UIButton*)in_sender {
    UIViewController *popoverContent = [[UIViewController alloc] init];
    CGRect theScreenFrame = [[UIScreen mainScreen] bounds];
    popoverContent.view.frame = CGRectMake(theScreenFrame.origin.x, theScreenFrame.origin.y,100, 100);
    popoverContent.view.backgroundColor = [UIColor whiteColor];
    popoverContent.contentSizeForViewInPopover = CGSizeMake(300, 300); 
    [popoverContent.view addSubview:imageButton];

    if(m_DetailPopover) {
        [m_DetailPopover release];
        m_DetailPopover = nil;
    }
    UIPopoverController m_DetailPopover = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
    [popoverContent release];   

    [m_DetailPopover presentPopoverFromRect:imageButton.frame inView:self.view
     permittedArrowDirections:UIPopoverArrowDirectionAny  animated:YES];    
}

Answer 1

问题可能是代码中的拼写错误:

UIPopoverController *m_DetailPopover = [[UIPopoverController alloc] initWithContentViewController:popoverContent];

另请注意，您不能在 imageTapped 中引用 imageButton，因为你在 viewDidLoad 中释放它。