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POAbout cutting of / cropping a uiview
 

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  1. POAbout cutting of / cropping a uiview
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    <p>so i have a uiview that is initialized with a frame that has the height and width that is present for the user, i want the user to be able to draw inside this frame but when the user presses a button, i want the view to cut off that extra wasted space so that the frame is only as big as what the user was drawing. I tried to do something like this </p> <pre><code>CGRect boundbox = CGPathGetBoundingBox([myPath CGPath]); boundbox.origin.x = self.frame.origin.x; boundbox.origin.y = self.frame.origin.y; self.frame = boundbox; </code></pre> <p>However, this does not remove that extra wasted space, it only resizes the view, so that the drawn content looks smaller than previously. What i would like to do instead is to remove that "whitespace", i was thinking if it could be possible to scale up the content of the uiview, but im not sure.</p> <p>To clarify what i mean:</p> <p><img src="https://i.stack.imgur.com/Nv6ZT.png" alt="enter image description here"></p> <p>The red border is the area / frame that the user can draw on, the text in the middle is a drawing, when the user presses a button, i want the frame to only encircle the drawing like in figure 2.</p> <p><img src="https://i.stack.imgur.com/vA8NO.png" alt="enter image description here"></p> <p>Now lets say i have the following scenario, i have drawn a circle on the middle of the screen.</p> <p><img src="https://i.stack.imgur.com/9lNDD.png" alt="enter image description here"></p> <p>When i then press the button, the scale remains the same but the circle is still in the same position but we have now changed the draw area, so the circle / drawing will look like its cut off like in figure 4.</p> <p><img src="https://i.stack.imgur.com/eEDuI.png" alt="enter image description here"></p> <p>What i want to do is to move the drawing / bezier path so that it is positioned in the middle of the frame. So that the red area encircles the blue circle.</p>
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