UIView的放大动画

     self.splashBg.transform =CGAffineTransformIdentity;

    [UIViewbeginAnimations:nilcontext:NULL];

    /* Make the animation 5 seconds long */

    [UIViewsetAnimationDuration:Animation_Duration];

    //图形放大两倍

    self.splashBg.transform =CGAffineTransformMakeScale(1.04f,1.04f);

    /* Commit the animation */

    [UIViewcommitAnimations];