cgaffinetransform
Convert CGPoint between iPhone & CA planes
I have a UIView subclass that I\'m drawing a PDF onto (using a CATiledLayer).I also need to draw on a specific region of that PDF, however the coordinate plane of the CATiledLayer when using CG to dra[详细]
2023-01-14 11:46 分类：问答How to scale up and crop a UIImage?
Here\'s the code I have but it\'s crashing ... any ideas? UIImage *tempImage = [[UIImage alloc] initWithData:imageData];[详细]
2023-01-14 04:45 分类：问答Getting the scale factor from a CABasicAnimation
I\'m animating a shrinking object. At any point the user can hit a button to get the current scale factor of the object. (I start by scaling the object up using a CGAffineTransformMakeScale, so the sc[详细]
2023-01-11 13:58 分类：问答Use PanGestureRecognizer translationInView to track touch location
How would i use a PanGestureRecognizer\'s translationInView which returns a CGPoint, to track the user touch location so that i can rotate an image so that the point where the user touches stays under[详细]
2023-01-10 07:43 分类：问答Rotate view using CGAfffineTransformRotate
I have a circular image which I am trying to rotate, so that the yellow and black striped circle stays under the user\'s finger and rotates in both directions. I have this so far:[详细]
2023-01-09 07:23 分类：问答how to rotate uibutton like this in iphone sdk
开发者_如何学Python how to rotate uibutton like this in iphone sdk.....If you have an IBOutlet Object.[详细]
2023-01-07 19:40 分类：问答zoomfactor value in CGAffineTransformMakeScale in iPhone
1)I\'m doing pinch zoom on the UIImageView , how should i decide upon the zoomfactorvalue, because when the zoomfactor value goes beyond 0[i.e negative value]the image is gettig tilted, which i dont w[详细]
2023-01-02 11:08 分类：问答iPhone: Scale UIView about a specific point
I want to animate the scaling down of a UIView, but not about its center: about a different point. As a开发者_如何学编程 shot in the dark, I tried translating the view, scaling, then translating bac[详细]
2023-01-01 05:49 分类：问答iPhone/iPad Pan, Pinch and Rotate a view simultaneously
I\'m trying to recreate the behaviour of the photos app, where you can pan, pinch and rotate simultaneously. I have the basics working, but I\'m stuck on something.[详细]
2022-12-30 02:06 分类：问答Get size of UIView after applying CGAffineTransform
I was surprised not to find an answer to this question, maybe is something very simple I somehow overlook :[详细]
2022-12-28 01:36 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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