iphone - Rotation Animation on UIImageView -

i have sunrays image. put on background , make rotate continuosly in slow motion..

the image this..

i've tried rotating cabasicanimation, rotates whole frame.. want sunrays revolve @ background not whole frame..

is there way it???

update:

here m doing...please point out mistakes... :(

i didn't got wat u've explained.. :(

here m doing...

 - (void)viewdidload { sunrayscontainer = [[uiview alloc] initwithframe:cgrectmake(0, 0, 1024, 768)]; sunrayscontainer.clipstobounds = yes; [self.view addsubview:sunrayscontainer];   sunrays = [[uiimageview alloc] initwithframe:cgrectmake(0, 0, 1024, 768)]; [sunrays setimage:[uiimage imagenamed:@"sunlight-background copy2.jpg"]]; [sunrayscontainer addsubview:sunrays];  backgroundbuilding = [[uiimageview alloc] initwithframe:cgrectmake(0, 0, 1024, 768)]; [backgroundbuilding setimage:[uiimage imagenamed:@"hira-background_fade.png"]];  [sunrayscontainer addsubview:backgroundbuilding];  [uiview beginanimations:nil context:nil];  [uiview setanimationduration:5];  cabasicanimation *rotationanimation;  rotationanimation = [cabasicanimation animationwithkeypath:@"transform.rotation.z"];  rotationanimation.tovalue = [nsnumber numberwithfloat:m_pi * 2.0 * 4.0];  rotationanimation.duration = 1;  rotationanimation.cumulative = yes;  rotationanimation.repeatcount = 10;  rotationanimation.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctioneaseout];  [sunrays.layer addanimation:rotationanimation forkey:@"rotationanimation"];  [uiview commitanimations];   } 

update...

i did u said nacho...thanks reply,but m getting blankscreen.. :(

i've coded dis...

   sunrays = [[uiimageview alloc] initwithimage:[uiimage imagenamed:@"sunlight-background copy2.jpg"]]; uiview *container = [[uiview alloc] initwithframe:cgrectmake(0,0,sunrays.frame.size.height,sunrays.frame.size.height)]; [container setclipstobounds:yes]; [container addsubview:sunrays]; [sunrays setcenter:cgpointmake(container.bounds.size.width/2, container.bounds.size.height/2)];  [uiview beginanimations:nil context:nil]; [uiview setanimationduration:5]; cabasicanimation *rotationanimation; rotationanimation = [cabasicanimation animationwithkeypath:@"transform.rotation.z"]; rotationanimation.tovalue = [nsnumber numberwithfloat:m_pi * 2.0 * 4.0]; rotationanimation.duration = 1; rotationanimation.cumulative = yes; rotationanimation.repeatcount = 10; rotationanimation.timingfunction = [camediatimingfunction functionwithname:kcamediatimingfunctioneaseout]; [sunrays.layer addanimation:rotationanimation forkey:@"rotationanimation"]; [uiview commitanimations]; 

what wrong wid code??

well think should generate different images , try animate this

imgloading.animationimages = [nsarray arraywithobjects:                               [uiimage imagenamed:@"img1.png"]                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:30.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:60.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:90.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:120.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:150.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:180.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:210.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:240.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:270.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:300.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:330.0]],                               [uiimage imagewithcgimage:                                [self cgimagerotatedbyangle:                                 [[uiimage imagenamed:@"img1.png"] cgimage]angle:360.0]], nil];  imgloading.animationrepeatcount=0; imgloading.animationduration=.5; [imgloading startanimating]; 

in above code have added images separately can populate them in loop.

- (cgimageref)cgimagerotatedbyangle:(cgimageref)imgref angle:(cgfloat)angle 

{

cgfloat angleinradians = angle * (m_pi / 180); cgfloat width = cgimagegetwidth(imgref); cgfloat height = cgimagegetheight(imgref);  cgrect imgrect = cgrectmake(0, 0, width, height); cgaffinetransform transform = cgaffinetransformmakerotation(angleinradians); cgrect rotatedrect = cgrectapplyaffinetransform(imgrect, transform);  cgcolorspaceref colorspace = cgcolorspacecreatedevicergb();  cgcontextref bmcontext = cgbitmapcontextcreate(null,                                                rotatedrect.size.width,                                                rotatedrect.size.height,                                                8,                                                0,                                                colorspace,                                                kcgimagealphapremultipliedfirst); cgcontextsetallowsantialiasing(bmcontext, yes); cgcontextsetshouldantialias(bmcontext, yes); cgcontextsetinterpolationquality(bmcontext, kcginterpolationhigh); cgcolorspacerelease(colorspace); cgcontexttranslatectm(bmcontext,                       +(rotatedrect.size.width/2),                       +(rotatedrect.size.height/2)); cgcontextrotatectm(bmcontext, angleinradians); cgcontexttranslatectm(bmcontext,                       -(rotatedrect.size.width/2),                       -(rotatedrect.size.height/2)); cgcontextdrawimage(bmcontext, cgrectmake(0, 0,                                          rotatedrect.size.width,                                          rotatedrect.size.height),                    imgref);    cgimageref rotatedimage = cgbitmapcontextcreateimage(bmcontext); cfrelease(bmcontext); [(id)rotatedimage autorelease];  return rotatedimage; 

}

the above function can used give rotated images..