iOS开发之简单动画学习一

动画效果设计一直是iOS平台的优势，良好的动效设计可以很好地提升用户体验，丰富app的展示，而动画则是动效的基础支撑。今天就来看一下简单的动画学习。
概念性的东西我就不做介绍了，我就直接上代码（简单暴力，呵呵）

1.简单的缩放代码

- (CAAnimation *)SetupScaleAnimation{
    CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    scaleAnimation.duration = 3.0;
    scaleAnimation.fromValue = [NSNumber numberWithFloat:1.0];
    scaleAnimation.toValue = [NSNumber numberWithFloat:3.0];
    scaleAnimation.repeatCount = MAXFLOAT;
    scaleAnimation.autoreverses = YES;
    scaleAnimation.fillMode = kCAFillModeForwards;
    scaleAnimation.removedOnCompletion = NO;
    
    return scaleAnimation;
}

2.简单的移动代码

- (CAAnimation *)SetupMoveAnimation{
    CABasicAnimation *moveAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
    moveAnimation.fromValue = [NSValue valueWithCGPoint:_label.layer.position];
    moveAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(_label.layer.position.x, 667-60)];
    moveAnimation.autoreverses = YES;
    moveAnimation.duration = 3.0;
    return moveAnimation;
}

3.简单的旋转代码

- (CAAnimation *)SetupRotationAnimation{
    CABasicAnimation *rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];
    rotationAnimation.duration = 1.5;
    rotationAnimation.autoreverses = YES;
    rotationAnimation.repeatCount = MAXFLOAT;
    rotationAnimation.fromValue = [NSNumber numberWithFloat:0.0f];
    rotationAnimation.toValue = [NSNumber numberWithFloat:2 * M_PI];
    rotationAnimation.fillMode = kCAFillModeBoth;
    return rotationAnimation;
}

4.动画组代码

- (CAAnimation *)SetupGroupAnimation{
    CAAnimationGroup *groupAnimation = [CAAnimationGroup animation];
    groupAnimation.duration = 3.0;
    groupAnimation.animations = @[[self SetupScaleAnimation], [self SetupMoveAnimation], [self SetupRotationAnimation]];
    groupAnimation.autoreverses = YES;
    groupAnimation.repeatCount = MAXFLOAT;
    return groupAnimation;
}

调用代码

- (void)SetupLayer{
    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(150, 20, 100, 30)];
    label.text = @"哈哈哈";
    label.font = [UIFont boldSystemFontOfSize:12];
    label.textColor = [UIColor redColor];
    [self.view addSubview:label];
    _label = label;
    [_label.layer addAnimation:[self SetupScaleAnimation] forKey:@"scale"];
}

虽然这些很初级，但是我之前一直不会怎么写，都是网上搜代码，所以我想学习一下，学习嘛，慢慢来，急也急不来，想做出很炫的动画，是要日积月累的。插入一我的故事：之前为了5.20，作为一个码农的我，算是费尽心思的取悦女朋友。学习的坚持是需要动力的，取悦我心爱之人是我的动力之一，其次还有就是我想做出更好的app，熟悉更多的知识。我想做出一个漂亮的动效给她看，就以葫芦画瓢仿照着写，终于有点成效，这就是我们码农的浪漫－用代码成就浪漫，更胜一切浪漫。
demo的下载地址
该demo只是为了实现动画效果，代码没做封装，望谅解，效果图如下：

用代码成就浪漫2.gif

学习笔记将持续更新。。。

iOS开发之简单动画学习一

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