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
Here\'s the code I have but it\'s crashing ... any ideas? UIImage *tempImage = [[UIImage alloc] initWithData:imageData];
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
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
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:
开发者_如何学Python how to rotate uibutton like this in iphone sdk.....If you have an IBOutlet Object.
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
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
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.
I was surprised not to find an answer to this question, maybe is something very simple I somehow overlook :
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