pointer= [[UIImageViewalloc]initWithImage:
[UIImageimageNamed:@"poi.png"]];
pointer.frame=CGRectMake(73,72,6,51);
pointer.layer.anchorPoint=CGPointMake(0.55,0.936);
//设置旋转中心,0.55表示横向55%处,0.936表示纵向93.6%处,均是以poi.png
//的长宽为基准
[self.viewaddSubview:pointer];
//上面将pointer加到view上,若使pointer绕旋转中心转动如下:
floatangle=1.0;//要旋转的弧度
CGAffineTransformtransform =
CGAffineTransformMakeRotation(angle);
pointer.transform= transform;
//这是顺时针旋转,若要逆时针需令angle = -1.0;
原创http://blog.csdn.net/u010132419/article/details/8920207