crash - exit on removeFromSuperview

hi all.

trying keep view being blurry.
i'm trying remove old views.

with:

code:

 uiview *removeview; while((removeview = [self viewwithtag:999]) != nil) { 	[removeview removefromsuperview]; } 

which set with:

code:

  uiimage *uiimage = [[uiimage alloc]retain];  uiimage = [currentcard stampimage];  cgsize mysize = uiimage.size;  uigraphicsbeginimagecontext(mysize); 	 [uiimage drawinrect:cgrectmake(stamppost.x,stamppost.y, stampsize.width, stampsize.height) blendmode:kcgblendmodenormal alpha:alpahed];   uiimage* blendedimage = uigraphicsgetimagefromcurrentimagecontext(); uigraphicsendimagecontext(); 		 uiimageview *stampoverlay = [[uiimageview alloc] initwithimage:blendedimage];  	 [blendedimage release];  [stampoverlay setframe:cgrectmake(0,0,bounds.size.width,bounds.size.height)]; [stampoverlay setalpha:stampbase]; [stampoverlay settag:999]; 	 [self addsubview:stampoverlay]; [stampoverlay release];  

i tried set set views alpha 0.0f , crashed too..
want redraws cleared. before draw update (redraw) view.

thanks
ian

 

give context. method code in?

 

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