iphone - UIImageView and UIImage of equal size -

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i came across weird scenario in code other day:

i have uiimageview loads image setimage:. uiimageview prior initialized frame having exact size of image (41*41 px). set content mode uiviewcontentmodecenter, should ensure image never scaled.

now when @ image view see image bit cropped horizontally , appears little blurred (this telltale sign rescaling happening in background). if instead initialize image view 1 pixel in width, works (however image view 1 pixel wider image).

also if initialize uiimageview initwithimage: seems work fine too. checked view's frame after initialization , found of same size: 41*41.

so bottom line have few workarounds issue, i'm trying understand what's happening here. explanations can think of are:

  1. there bug in framework
  2. the rendering of images doesn't work images of particular size. know examples textures powers of 2, though doubt has significance uiimageview.

for record i'm compiling os 3.0 , issue happens on both simulator , device.

is uiimageview contained inside other views? 1 thing i've had before blurred controls caused fractional pixel offsets. i.e. if calculate frame using division , end non-integer float value uikit can add strange blurring @ offsets , sizes.

so image view may have integer size, it's absolute frame when taking parent(s) consideration may not be.


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