在iOS中,动画实现方向有两种,一种是操作UIView的animation方法,另外一种就是核心动画,但到iOS7中,UIView又跟核心动画牵扯在一起。

方式一(利用核心动画添加动画)

  • 核心动画的层次关系

  • iOS动画实现总结-LMLPHP

  • 转场动画(CATransition)

    • 用于做场景的转换动画,能偶为层提供移出屏幕和一如屏幕的动画效果。
    • UINavigationController就是通过CATransition实现了讲控制器的师徒推入屏幕的动画效果。
    • 常用属性
      • type动画过度类型
      • subtype:动画过度方向
      • startProgress:动画起点(在整体的百分比)(可用的值从0到1,在动画中起点或终点的逗留时间,开始的时间一定要比结束的时间小,下同)
      • endProgress:动画终点(在整体动画的百分比)
   CATransition *animation = [CATransition animation];
animation.type = @"reveal";
animation.duration = ;
animation.subtype = kCATransitionReveal;
[self.myView.layer addAnimation:animation forKey:nil];
CGPoint point = self.myView.center;
point.y += ;
[self.myView setCenter:point];
  • 基本动画(CABasicAnimation),是CAPropertyAnimation的子类,一个动画可控制一个属性的变化,变化值只能是两个值中变化,可以在fromValue和toValue两个值中设置

    CABasicAnimation *baseAnimation = [CABasicAnimation animationWithKeyPath:@"bounds"];
    baseAnimation.fromValue = [NSValue valueWithCGRect:CGRectMake(, , , )];
    baseAnimation.toValue = [NSValue valueWithCGRect:CGRectMake(, , , )]; baseAnimation.duration = 2.0;
    baseAnimation.removedOnCompletion = NO;
    baseAnimation.fillMode = kCAFillModeForwards;
    baseAnimation.repeatCount = MAXFLOAT; [self.myView.layer addAnimation:baseAnimation forKey:nil];
  • 帧动画(CAKeyframeAnimation),帧动画也是CAPropertyAnimation的子类,所以也是控制一个view的属性做动画,与CABaseAnimation不同的是,CAKeyFrameAnimation可以添加多个关键帧,而CABaseAnimation可以看做是两个关键帧的帧动画,我们可以好好利用帧动画的关键帧来做比较有趣的动画,如泡泡效果。

   CAAnimationGroup *group = [[CAAnimationGroup alloc] init];
// 位移
CAKeyframeAnimation *positionAnima = [CAKeyframeAnimation animationWithKeyPath:@"position"];
positionAnima.calculationMode = kCAAnimationCubicPaced;
positionAnima.duration = 5;
positionAnima.fillMode = kCAFillModeForwards;
positionAnima.removedOnCompletion = NO;
positionAnima.repeatCount = MAXFLOAT;
positionAnima.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]; // 添加移动路径
CGMutablePathRef curvedPath = CGPathCreateMutable();
CGRect circleContainer = CGRectInset(myView.frame, myView.frame.size.width / - , myView.frame.size.height / - );
CGPathAddEllipseInRect(curvedPath, NULL, circleContainer);
positionAnima.path = curvedPath;
CGPathRelease(curvedPath);
[myView.layer addAnimation:positionAnima forKey:nil]; // 缩放X
CAKeyframeAnimation *scaleX = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale.x"];
scaleX.duration = 1.0;
scaleX.values = @[@1.0,@1.1,@1.0];
scaleX.keyTimes = @[@0.0,@0.5,@1.0];
scaleX.repeatCount = MAXFLOAT;
scaleX.autoreverses = YES; scaleX.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
[myView.layer addAnimation:scaleX forKey:nil]; // 缩放Y
CAKeyframeAnimation *scaleY = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale.y"];
scaleY.duration = 1.5;
scaleY.values = @[@1.0,@1.1,@1.0];
scaleY.keyTimes = @[@0.0,@0.5,@1.0];
scaleY.repeatCount = MAXFLOAT;
scaleY.autoreverses = YES; group.animations = @[positionAnima,scaleX,scaleY];
scaleY.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
[myView.layer addAnimation:scaleY forKey:nil];

运行效果

iOS动画实现总结-LMLPHP由于本人的电脑是黑苹果,所以将就一下啦,哈哈,白苹果应该不会这样的。

  • 动画组(CAAnimationGroup)CAAnimation的子类,可以保存一组动画对象,讲CAAnimationGroup对象加入层后,组中所有动画可以同时运行,所以,当我们需要做多个动画并且执行的时间不一样的时候,动画组就不适用。例如上面的泡泡效果。
group.animations = [里面放动画对象];

方式二(利用UIView添加动画)

  • UIView动画(手码)

    • 添加单个动画

      [UIView beginAnimations:nil context:nil];
      [UIView setAnimationDuration:];
      CGPoint point = self.myView.center;
      point.y += ;
      [self.myView setCenter:point];
      [UIView commitAnimations];
    • 添加多个动画
  [UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:];
CGPoint point = self.myView.center;
point.y += ;
[self.myView setCenter:point];
[UIView commitAnimations]; [UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:];
[self.myView setAlpha:0.1];
[UIView commitAnimations];
  • UIView动画(Block)
[UIView animateWithDuration: animations:^{
CGPoint point = self.myView.center;
point.y += ;
[self.myView setCenter:point];
}];
  • UIView动画(Block帧动画),从iOS7开启,苹果提供了比较便捷的方法来调用帧动画,不用新建帧动画实例,直接对layer的属性进行控制。
[UIView animateKeyframesWithDuration:0.5 delay: options:UIViewKeyframeAnimationOptionAutoreverse animations:^{
self.view.bounds = CGRectMake(, , , );
} completion:^(BOOL finished) { }];
 
  • UIView转场动画。
+ (void)transitionFromView:(UIView *)fromView toView:(UIView *)toView duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options completion:(void (^)(BOOL finished))completion

这个方法应该不好理解,简单来说,这个方法调用完毕后,相当于执行了两句代码,

// 添加toView到父视图
[fromView.superview addSubview:toView];
// 把fromView从父视图中移除
[fromView.superview removeFromSuperview];
- duration:动画的持续时间
- duration:动画的持续时间
- options:转场动画的类型
- animations:将改变视图属性的代码放在这个block中
- completion:动画结束后,会自动调用这个block
 
05-11 04:49
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