flip

问题 I know it's probably a dummy question, but I have to ask: How to flip a UIView vertically? I'm not asking for doing a animation, but just flip it. I can do vertical flip a UILabel by: label1.layer.transform = CATransform3DMakeRotation(M_PI, 1.0f, 0.0f, 0.0f); and turn it back by: label1.layer.transform = CATransform3DMakeRotation(M_PI, 0.0f, 0.0f, 0.0f); But when I'm doing it to a view: self.view.layer.transform = CATransform3DMakeRotation(M_PI, 1.0f, 0.0f, 0.0f); I think it only rotate half

问题 I have read about affine transform in wikipedia this page: https://en.wikipedia.org/wiki/Affine_transformation I says that if I would like to reflect an image, I can set the affine matrix to be [[-1, 0, 0], [0, 1, 0], [0, 0, 1]], but when I tried this code: im = cv2.imread(imgpth) im = cv2.resize(im, (1024, 512)) H, W, _ = im.shape cv2.imshow('org', im) M = np.float32([[-1, 0, 0], [0, 1, 0]]) aff = cv2.warpAffine(im, M, (W, H)) cv2.imshow('affine', aff) cv2.waitKey(0) I did not an flipped

问题 I have read about affine transform in wikipedia this page: https://en.wikipedia.org/wiki/Affine_transformation I says that if I would like to reflect an image, I can set the affine matrix to be [[-1, 0, 0], [0, 1, 0], [0, 0, 1]], but when I tried this code: im = cv2.imread(imgpth) im = cv2.resize(im, (1024, 512)) H, W, _ = im.shape cv2.imshow('org', im) M = np.float32([[-1, 0, 0], [0, 1, 0]]) aff = cv2.warpAffine(im, M, (W, H)) cv2.imshow('affine', aff) cv2.waitKey(0) I did not an flipped

问题 I have read about affine transform in wikipedia this page: https://en.wikipedia.org/wiki/Affine_transformation I says that if I would like to reflect an image, I can set the affine matrix to be [[-1, 0, 0], [0, 1, 0], [0, 0, 1]], but when I tried this code: im = cv2.imread(imgpth) im = cv2.resize(im, (1024, 512)) H, W, _ = im.shape cv2.imshow('org', im) M = np.float32([[-1, 0, 0], [0, 1, 0]]) aff = cv2.warpAffine(im, M, (W, H)) cv2.imshow('affine', aff) cv2.waitKey(0) I did not an flipped

问题 I am doing a flip transition between two subviews of a container view. The container view is NOT fullscreen and is not the root view of the view controller (it is a subview thereof, taking roughly the bottom third of the screen). Of the two child views being switched in the flip transition (both of them UIImageView), one of them has two children in turn (again, of UIImageView type). This subview is the one that "goes away" as a result of the transition. As soon as the transition starts, the

问题 I am doing a flip transition between two subviews of a container view. The container view is NOT fullscreen and is not the root view of the view controller (it is a subview thereof, taking roughly the bottom third of the screen). Of the two child views being switched in the flip transition (both of them UIImageView), one of them has two children in turn (again, of UIImageView type). This subview is the one that "goes away" as a result of the transition. As soon as the transition starts, the

问题 As usual in android, each time the screen is flipped to portrait/landscape mode an Activity runs through life-cycle from onSaveInstanceState to onDestroy and then is recreated. In my Activity there's a ButtonText which can be changed by the user. It's reseted to the initial state, but I have to save the last state somehow. How can I achieve that, will I have to override onSaveInstanceState? Can someone show an example? 回答1: Step #1: Call getText().toString() on the Button to get the caption.

问题 As usual in android, each time the screen is flipped to portrait/landscape mode an Activity runs through life-cycle from onSaveInstanceState to onDestroy and then is recreated. In my Activity there's a ButtonText which can be changed by the user. It's reseted to the initial state, but I have to save the last state somehow. How can I achieve that, will I have to override onSaveInstanceState? Can someone show an example? 回答1: Step #1: Call getText().toString() on the Button to get the caption.

问题 I have an Imageview and I want to flip picture horizontally whenever user click on the Button named "Flip Picture" . and when User click this button second time it should return to orignal state in other words flip back. So it should repeat this behavior. I found this useful code to flip the image view with out using external library , but do not know how to flip back: Here is the Code : public Bitmap flipImage(Bitmap src, int type) { // create new matrix for transformation Matrix matrix =

问题 I want to create a flip effect that fires on mouseover and flips back to the front panel on mouse out.. so there has to be a front and a back-side of the card that should flip: HTML: <div class="card"> <div class="front"> Front-Content </div> <div class="back"> Back-Content </div> </div> <div class="card"> <div class="front"> 2nd Front-Content </div> <div class="back"> 2nd Back-Content </div> </div> So as you can see I want multiple cards to flip to their back-sides on mouseover. I think the