ios - Show Blended Layers reveals red UIImage but it does not have an alpha channel -

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i have image not have alpha channel - confirmed in finder's info panel. yet when put in uiimageview within uiscrollview , enable show blended layers, image red indicates it's trying apply transparency hit on performance.

how can fix green ios knows in view opaque?

i tried following did not remove red color:

self.imageview.opaque = yes; self.scrollview.opaque = yes;

by default, uiimage instances rendered in graphic context includes alpha channel. avoid it, need generate image using new graphic context opaque = yes.

- (uiimage *)optimizedimagefromimage:(uiimage *)image {     cgsize imagesize = image.size;     uigraphicsbeginimagecontextwithoptions( imagesize, opaque, scale );     [image drawinrect: cgrectmake( 0, 0, imagesize.width, imagesize.height )];     uiimage *optimizedimage = uigraphicsgetimagefromcurrentimagecontext();     uigraphicsendimagecontext();     return optimizedimage; }

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