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    <p>Having examined some of the similar questions (<a href="https://stackoverflow.com/questions/19858513/change-uiview-size-after-rotation-transform">Change uiview size after rotation transform</a> and <a href="https://stackoverflow.com/questions/12670750/how-to-resize-the-uiview-when-cgaffinetransformidentity">How to resize the UIView when CGAffineTransformIdentity</a>) and read the <a href="https://developer.apple.com/library/mac/documentation/graphicsimaging/reference/CGAffineTransform/Reference/reference.html" rel="nofollow noreferrer">Official documentation about CGAffineTransform</a> I have come to some simple conclusions. Will explain them below.</p> <p>When you use <code>CGAffineTransform</code> for some object with followed frame transform you must use some rules for obtain correct result: </p> <ol> <li><p>If transform property of object is equal <code>CGAffineTransformIdentity</code> you can change frame of object or use <code>CGAffineTransform</code> without restriction.</p></li> <li><p>If If transform property of object is not equal <code>CGAffineTransformIdentity</code> and you want change frame of object without <code>CGAffineTransform</code>:<br> a) save value of object transform to some local (or another type) variable<br> b) set transform property of object to CGAffineTransformIdentity<br> c) change frame of object<br> d) restore transform value from local (or another type) variable.</p></li> <li>If transform property of object is not equal <code>CGAffineTransformIdentity</code> and you want use <code>CGAffineTransform</code>, for example <code>new_transform</code>:<br> a) use <code>CGAffineTransformConcat([object transform] , new_transform)</code> to obtain <code>result_transform</code><br> b) set transform value of object to <code>result_transform</code> </li> </ol> <p>Compliance with these simple rules will help avoid many problems.</p> <p>Note: you must remember, when you use <code>CGAffineTransformConcat</code> all transform totalized. For example: if you want rotate object from 6 degree to 7 degree, you must add transform rotate to 1 degree, not to 7. Otherwise you obtain rotation 6 + 7 = 13 degree.</p>
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    1. COThis explanation really helped me a lot. I will Follow this and post my result output here. Thanks for helping me in my difficult situation. am stuck with it for last 2 days and was approaching with CIContext which was getting much more complex
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    2. COThanx and its done now :D
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