ios - 'NSInvalidArgumentException'，原因 : '-[UIView isAnimating]: unrecognized selector sent to instance

Question

xcode 和 objective-c 的新手。所以请原谅我的菜鸟错误，但我已经遇到这个错误“'NSInvalidArgumentException'，原因:'-[UIView isAnimating]:无法识别的选择器发送到实例”已经一天多了，并且已经做了很多搜索但没有成功。当我清理/构建应用程序时没有错误，但是当我单击按钮加载“UIIMagePickerController”时，应用程序终止并引发错误。请帮忙。谢谢

- (void)showImagePickerForSourceType:(UIImagePickerControllerSourceType)sourceType
{
    if (self.imageView.isAnimating)
    {
        [self.imageView stopAnimating];
    }

    if (self.capturedImages.count > 0)
    {
        [self.capturedImages removeAllObjects];
    }

    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    imagePickerController.modalPresentationStyle = UIModalPresentationCurrentContext;
    imagePickerController.sourceType = sourceType;
    imagePickerController.delegate = self;

    if (sourceType == UIImagePickerControllerSourceTypeCamera)
    {
        imagePickerController.showsCameraControls = NO;

        [[NSBundle mainBundle] loadNibNamed:@"OverlayView" owner:self options:nil];
        self.overlayView.frame = imagePickerController.cameraOverlayView.frame;
        imagePickerController.cameraOverlayView = self.overlayView;
        self.overlayView = nil;
    }

    self.imagePickerController = imagePickerController;
   [self presentViewController:self.imagePickerController animated:YES completion:nil];

Answer 1

您的代码self.imageView.isAnimating正在被编译器转换为[类似于]:

[[self imageView] isAnimating]

根据错误消息，[self imageView] 返回一个 UIView 对象。 UIView 类上没有方法 isAnimating，因此会出现异常。

找出[self imageView]的设置位置，也许它在那里做错了什么？另外，你有没有开启ARC？这可能是一个内存管理错误。