Дизайн:
Иерархия просмотра выглядит следующим образом:
UIScrollView
(for paging multiple image)UIScrollView
(for enabling zoom on theUIImageView
)UIImageView
UIView
(origin,size relative toUIImage
inUIImageView
)UIView
UIView
...
UIScrollview
UIImageView
UIView
UIView
...
UIScrollView
... и так далее
Реализация:
- (id)init
{
self = [super init];
if (self) {
// Custom initialization
self.minimumZoomScale = 1.0f;
self.maximumZoomScale = 4.0f;
self.zoomScale = 1.0f;
self.bouncesZoom = true;
self.bounces = true;
self.tag = 10;
self.alwaysBounceHorizontal = false;
self.autoresizesSubviews = YES;
self.zoomView = [[UIImageView alloc] init];
self.zoomView.userInteractionEnabled = YES;
self.zoomView.autoresizesSubviews = YES;
}
return self;
}
- (void)displayImage:(UIImage *)image
{
// Set the image in the view
[_zoomView setImage:image];
// Set the Frame size to the size of image size
// Ex. Resulting ScrollView frame = {0,0},{1250,1500}
// Ex. Resulting ImageView frame = {0,0}, {1250,1500}
CGRect scrollFrame = self.frame;
scrollFrame.size.width = image.size.width;
scrollFrame.size.height = image.size.height;
self.frame = scrollFrame;
CGRect iViewFrame = _zoomView.frame;
iViewFrame.size.width = image.size.width;
iViewFrame.size.height = image.size.height;
_zoomView.frame = iViewFrame;
// Add subviews before resetting the contentsize
for (customClass* field in list.fields) {
UIView* view = [[UIView alloc] initWithFrame:CGRectMake([field.x floatValue], [field.y floatValue], [field.width floatValue], [field.height floatValue])];
view.backgroundColor = [UIColor redColor];
view.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin |UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
[_zoomView addSubview:view];
}
// Set the Frame size to the size of scrollview frame size
// Ex. Resulting ScrollView Frame = {0,0},{320,460}
// Ex. Resulting ImageView Frame = {0,0},{320,460}
CGRect scrollViewFrame = self.frame;
scrollViewFrame.size.width = 320.0f;
scrollViewFrame.size.height = 460.0f;
self.frame = scrollViewFrame;
CGRect imageViewFrame = _zoomView.frame;
imageViewFrame.size.width = self.bounds.size.width;
imageViewFrame.size.height = self.bounds.size.height;
_zoomView.frame = imageViewFrame;
self.contentSize = _zoomView.bounds.size;
[self addSubview:_zoomView];
}
Выше приведен код, который я пытался реализовать. Он добавляет UIView
s к UIImageView
внутри UIScrollView
. Но относительное происхождение UIView
неверно (как до, так и после изменения размера).
Есть ли что-то, что я должен сделать по-другому, чтобы правильно разместить UIView
внутри UIImageView
?