UIImageView 从左到右出现的动画效果

UIImageView *imgView =[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 0, 460)];    [imgView setImage:[UIImage imageNamed:@"pagethr.png"]];    self.imageViews = imgView;    [self.view addSubview:imageViews];    [imgView release];        CGContextRef  context = UIGraphicsGetCurrentContext();    [UIView beginAnimations:nil context:nil];    [UIView setAnimationCurve:UIViewAnimationCurveLinear];    [UIView setAnimationDuration:0.75];        [imageViews setFrame:CGRectMake(0, 0, 320, 460)];    [UIView commitAnimations];