Question

我创建了一个图像数组，它们从imageview开始。用户可以使用手势拾取图像并将其拖放到单独的图像视图中。他们可以来回移动他们，他们洗牌和组织自己，一切都很顺利。

但我不知道他们在哪个imageview中进入了哪个。如何识别哪个图像存在于哪个imageview中。我可以查询imageview中的内容吗？

我查看了标签，这没什么用。

我生成数组

NSArray *pngs = [NSArray arrayWithObjects:@"red", @"blue", @"green", @"yellow", @"purple", @"orange", @"black", @"white", nil];

  for (NSString *png in pngs) {
    UIImage *draggableImage = UIImageWithBundlePNG(png);
    UIImageView *draggableImageView = [[UIImageView alloc] initWithImage: draggableImage];
    SEDraggable *draggable = [[SEDraggable alloc] initWithImageView: draggableImageView];
    [self configureDraggableObject: draggable];

不确定从哪里开始。

Answer 1

尝试将标签添加到UIImageView

  NSArray *pngs = [NSArray arrayWithObjects:@"red", @"blue", @"green",
 @"yellow",        @"purple", @"orange", @"black", @"white", nil];

for (NSString *png in pngs) {

UIImage *draggableImage = UIImageWithBundlePNG(png);

UIImageView *draggableImageView = [[UIImageView alloc] initWithImage: draggableImage];

draggableImageView.tag = i++;//i  must be initialized 

SEDraggable *draggable = [[SEDraggable alloc] initWithImageView: draggableImageView];

[self configureDraggableObject: draggable];

您可以通过[imageView viewWithTag：TAG]识别图像视图;方法

Answer 2

要了解附加视图时的视图，您只需查看属性'superView'，所以在您的情况下如果想知道UIImageView内部的视图，您需要引用UIImageView之类的：

UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bla"]];

UIView *imageContainer = imageView.superView;

如果您现在可以为容器分配标签：

if (imageContainer.tag == aTag) {

    Do something...
}

xcode查找UIImageview的内容

2 个答案: