沿Y轴的空间旋转动画

项目更新，要做旋转动画，找到几种方法来实现，在此做下记录，以便日后使用方便！

1、实现图片的自动旋转

如果你门项目要求很简单，就是想让它旋转一下，那么下面这个就很适合你！

根据设定的时间，设定的弧度自动旋转

CABasicAnimation* rotationAnimation;

//此处可根据需要设置x/y/z轴

rotationAnimation = [CABasicAnimationanimationWithKeyPath:@"transform.rotation.y"];

//fromValue 和 toValue 这两个参数控制着方向

rotationAnimation.fromValue =[NSNumbernumberWithFloat:M_PI/2];

rotationAnimation.toValue= [NSNumbernumberWithFloat:M_PI/2];

rotationAnimation.duration=0.3;

rotationAnimation.cumulative=NO;

rotationAnimation.repeatCount=0;

rotationAnimation.autoreverses=YES; //自动回放

[imageView.layeraddAnimation:rotationAnimationforKey:@"rotationAnimation"];

通过以上代码就可以设置一张图片的自动旋转啦！

但是，如果你要是旋转了180°，那么图片是反的，无解！！！图片对称没问题

2、切换图片的旋转

在我们的项目中，要求了旋转后要更换图片，甚至界面，所以旋转升级了

1.构建两个视图，利用系统封装好的转换动画进行切换

核心代码：

[UIViewtransitionFromView:fromView toView:toView duration:1 options:UIViewAnimationOptionTransitionFlipFromLeft  completion:^(BOOLfinished) {

}];

//UIViewAnimationOptionTransitionFlipFromLeft这个属于转场形式，所以你可以自己选

代码示例：

使用：

_switchView= [[SwitchAnimaViewalloc]initWithFrame:CGRectMake(self.view.frame.size.width-60,0,40,40*ONEHIGHT_VIEW)];

_switchView.backgroundColor= [UIColorcolorWithWhite:0.0alpha:1];

[commentMaskViewaddSubview:self.switchView];

UIView*backView=[[UIViewalloc]initWithFrame:_switchView.bounds];

UIView*frontView=[[UIViewalloc]initWithFrame:_switchView.bounds];

UIButton*shopB = [UIButtonnew];

[shopBsetImage:[UIImageimageNamed:@"img"]forState:UIControlStateNormal];

[shopBaddTarget:selfaction:@selector(btnClick:)forControlEvents:UIControlEventTouchUpInside];

shopB.frame=CGRectMake(0,0,40,40);

[backViewaddSubview:shopB];

_switchView.backView= backView;

UIButton*interactionB = [UIButtonnew];

[interactionBsetImage:[UIImageimageNamed:@"img2"]forState:UIControlStateNormal];

[interactionBaddTarget:selfaction:@selector(btnClick:)forControlEvents:UIControlEventTouchUpInside];

interactionB.frame=CGRectMake(0,0,40,40);

[frontViewaddSubview:interactionB];

_switchView.frontView= frontView;



- (void)btnClick:(UIButton*)sender{

            _switchView.isBeginFlip=YES;

}

//封装

#import"SwitchAnimaView.h"

@implementationSwitchAnimaView

- (instancetype)initWithFrame:(CGRect)frame {

        if(self=[superinitWithFrame:frame]) {

                self.backView.backgroundColor= [UIColorcolorWithWhite:0.0alpha:0];

                self.frontView.backgroundColor= [UIColorcolorWithWhite:0.0alpha:0];

                self.goingToFrontView=NO;

            }

           returnself;

}

- (void)setFrontView:(UIView*)frontView {

        if(!_frontView) {

            _frontView=frontView;

            [selfaddSubview:frontView];

            [selfbringSubviewToFront:self.frontView];

        }

}

- (void)setBackView:(UIView*)backView {

        if (!_backView) {

            _backView=backView;

          }

}

- (void)setIsBeginFlip:(BOOL)isBeginFlip {

            self.goingToFrontView= !self.goingToFrontView;

            UIView*fromView =self.goingToFrontView?self.frontView:self.backView;

            UIView*toView =self.goingToFrontView?self.backView:self.frontView;

            [UIViewtransitionFromView:fromView toView:toView duration:1 options:UIViewAnimationOptionTransitionFlipFromLeft  completion:^(BOOLfinished) {

            }];

}

分析/注意：1.如果你要转这个布局中的某个视图，那么最好把封装到，因为弄不好你会把根视图旋转的

2.如果你的图片背景是透明的，那么效果不是很好

NO.3 可控制的旋转，切换图片

这种我是看到京东app中，商品图片右下角的1/4字样，旋转180°，变成2/4,图片仍然是正的，并且它会跟着上面商品轮播的偏移值的大小改变图片的旋转角度。这让我绞尽脑汁，查了很多方法，但是后来仔细观察才知道，他正旋转了90°，逆向旋转90°

很简单就是利用了一句核心代码：

imgView.layer.transform=CATransform3DMakeRotation(angle/2,0,1,0);

实现代码：

- (void)viewDidLoad {

        [superviewDidLoad];

        // Do any additional setup after loading the view.

        self.view.backgroundColor= [UIColorwhiteColor];

        UIImage*imag = [UIImageimageNamed:@"image1"];

        UIImageView*parentView = [[UIImageViewalloc]initWithFrame:CGRectMake(100,150, imag.size.width+3, imag.size.height)];

        parentView.image=imag;

        parentView.tag=1000;

        [self.viewaddSubview:parentView];

        UIButton*button=[UIButtonbuttonWithType:(UIButtonTypeSystem)];

        button.frame=CGRectMake(0,0,100,80);

        [buttonsetImage:imagforState:UIControlStateNormal];

        [buttonaddTarget:selfaction:@selector(buttonClick)forControlEvents:(UIControlEventTouchUpInside)];

        [self.viewaddSubview:button];

}

- (void)buttonClick{

        b= !b;

        if(!_timer) {

        _timer= [NSTimertimerWithTimeInterval:0.05target:selfselector:@selector(timerAction)userInfo:nilrepeats:YES];

        [[NSRunLoopmainRunLoop]addTimer:self.timerforMode:NSDefaultRunLoopMode];

    }

}

- (void)timerAction{

        UIImageView*parentView = [self.viewviewWithTag:1000];

        if(angleM_PI-0.05) {

        parentView.image=b?[UIImageimageNamed:@"image2"]:[UIImageimageNamed:@"image1"];

        a=YES;

}

//a 用来控制旋转角度的

if(a==NO) {

    angle+=0.1;

}

if(a==YES) {

    angle-=0.1;

}

//CATransform3DMakeRotation(角度,x,y,z);

parentView.layer.transform=CATransform3DMakeRotation(angle/2,0,1,0);

if(angle<0.01) {

    // 完成动画，重置

    [_timerinvalidate];

    _timer=nil;

    angle=0;    

    a=NO;

    }

}

搞定！！！

简单的旋转动画基本已经实现，Demo什么的就不放了!

沿Y轴的空间旋转动画

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