IOS简单的动画

前言

        在IOS客户端开发中，用到动画的地方比较少，如果是要把app做的很酷炫，那么就有必要用一些动画效果。

一、最普通的动画

1、下面这段代码是最简单的动画，只是实现了简单的位置移动和变化

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
    imgView.image = [UIImage imageNamed:@"123.jpg"];
    [self.view addSubview:imgView];
    
    [UIView beginAnimations:nil context:nil]; //设置动画开始
    [UIView setAnimationDuration:3.0];//设置整个动画的时间
    
    CGRect frame = imgView.frame;
    frame.origin.x += 150;
    frame.origin.y += 100;
    [imgView setFrame:frame];
    [UIView commitAnimations]; //动画结束
    
}

2、CATransition 动画

      这种动画，我觉得可以通俗的理解为视图或者控件出场的动画效果。

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
    imgView.image = [UIImage imageNamed:@"123.jpg"];
    [self.view addSubview:imgView];
    
    CATransition *animation = [CATransition animation];
    animation.duration = 0.5f; //设置动画的时间
    animation.timingFunction = UIViewAnimationCurveEaseInOut; //设置动画的方式
    animation.fillMode = kCAFillModeBackwards;
    animation.type = kCATransitionMoveIn;
    animation.subtype = kCATransitionFromLeft;
    
    [imgView.layer addAnimation:animation forKey:@"animation"];
    
}

3、先变大后消失的动画效果

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
    imgView.image = [UIImage imageNamed:@"123.jpg"];
    [self.view addSubview:imgView];
   
    [UIView animateWithDuration:3.25 animations:^{
        CGAffineTransform newTransform = CGAffineTransformMakeScale(2.2, 2.2);
        [imgView setTransform:newTransform];
    }completion:^(BOOL finished){
        [imgView removeFromSuperview];

    }];
}

4、源码下载地址：http://download.csdn.net/detail/u010545480/8615617