UIImageView切换图片 From http://www.cnblogs.com/foxmin/archive/2012/04/13/2445612.html

UIImageView切换图片

/*=======================================================
 更新图片显示
 ========================================================*/
-(void)ChangeImage{
    CGContextRef context = UIGraphicsGetCurrentContext();
    [UIView beginAnimations:nil context:context];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationDuration:0.5]; //动画长度，单位为秒
    [self.view setAlpha:1];
    [myimageview setAlpha:1];
    [myimageview setImage:[imgArray objectAtIndex:Page]];
    //[myimageview setAnimationRepeatCount:4]; //设置重复次数
    [UIView commitAnimations];
    self.navigationItem.title = [NSString stringWithFormat:@"%d/%d",Page+1,[imgArray count]];
}