iOS CGAffineTransform 动画
CoreGraphics框架中的CGAffineTransform类可用于设定UIView的transform属性,控制视图的缩放、旋转和平移操作:
另称放射变换矩阵,可参照线性代数的矩阵实现方式
这里附上的CGAffineTransform官方文档:
https://developer.apple.com/library/ios/documentation/GraphicsImaging/Reference/CGAffineTransform/index.html
Transform 是一种状态,并且只有一种状态
(1)CGAffineTransformMakeTranslation(<#CGFloat tx#>, <#CGFloat ty#>):只能变化一次,因为这种方式的变化始终是以最原始的状态值进行变化的,所以只能变化一次
(2)CGAffineTransformTranslate(CGAffineTransform t, <#CGFloat tx#>, <#CGFloat ty#>):能够多次变化,每次变化都是以上一次的状态(CGAffineTransform t)进行的变化,所以可以多次变化
(3) CGAffineTransformIdentity:清空所有的设置的transform(一般和动画配合使用,只能使用于transfofrm设置的画面)
(4)CGAffineTransformMakeScale( CGFloat sx, CGFloat sy) (缩放:设置缩放比例)仅通过设置缩放比例就可实现视图扑面而来和缩进频幕的效果。
(5) CGAffineTransformMakeRotation( CGFloat angle) (旋转:设置旋转角度)
关键代码如下:
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@implementation ViewController
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@synthesize imageview1,imageview2, label1, imageContainView;
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UIImage *image1, *image2;
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UIView *view1, *view2;
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- (IBAction)button1_click:(id)sender {
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//翻转动画,旋转360度后复原(doflip)
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// additional context info passed to will start/did stop selectors. begin/commit can be nested
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//注意:动画效果是setAnimationTransition控制的,beginAnimations只是标识了这一组动画的名称
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[UIView beginAnimations:@"doflip" context:nil];
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[UIView setAnimationDuration:2];
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/*
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动画速度
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typedef NS_ENUM(NSInteger, UIViewAnimationCurve) {
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UIViewAnimationCurveEaseInOut, // slow at beginning and end
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UIViewAnimationCurveEaseIn, // slow at beginning
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UIViewAnimationCurveEaseOut, // slow at end
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UIViewAnimationCurveLinear
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};
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*/
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[UIView setAnimationCurve:UIViewAnimationCurveLinear];
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[UIView setAnimationDelegate:self];
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//设置翻转动画的起始方向
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//UIViewAnimationTransitionFlipFromLeft(从左到右)
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//UIViewAnimationTransitionFlipFromLeft(从右到左)
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[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:imageContainView cache:YES];
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// starts up any animations when the top level animation is commited
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[UIView commitAnimations];
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}
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- (IBAction)button2_click:(id)sender {
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//旋转动画,保持旋转后的状态(rotate)
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CGAffineTransform transform = CGAffineTransformRotate(imageContainView.transform, M_PI/6.0);
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[UIView beginAnimations:@"rotate" context:nil];
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[UIView setAnimationDuration:2];
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[UIView setAnimationDelegate:self];
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[imageContainView setTransform:transform];
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[UIView commitAnimations];
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}
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- (IBAction)button3_click:(id)sender {
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//偏移动画(move)
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[UIView beginAnimations:@"move" context:nil];
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[UIView setAnimationDuration:2];
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[UIView setAnimationDelegate:self];
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imageContainView.frame = CGRectMake(80, 80, 200, 200);
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[label1 setBackgroundColor:[UIColor yellowColor]];
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[label1 setTextColor:[UIColor redColor]];
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[UIView commitAnimations];
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}
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- (IBAction)button4_click:(id)sender {
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//翻页动画(curlUp 和 curlDown)
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//curlUp表示将这一页翻上去
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//curlDown表示将上一页翻下来
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//注意:翻页动画针对的是与屏幕平行的矩形,如果被旋转相应角度,翻页不正常
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[UIView beginAnimations:@"xxx" context:nil];
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[UIView setAnimationDuration:2];
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[UIView setAnimationDelegate:self];
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[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:imageContainView cache:YES];
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NSInteger imageview1Index = [[imageContainView subviews] indexOfObject:imageview1];
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NSInteger imageview2Index = [[imageContainView subviews] indexOfObject:imageview2];
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NSLog(@"subview index %ld %ld", imageview1Index, imageview2Index);
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//交换2视图的位置
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[imageContainView exchangeSubviewAtIndex:imageview2Index withSubviewAtIndex:imageview1Index];
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[UIView commitAnimations];
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}
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- (IBAction)button5_click:(id)sender {
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//缩放动画(scale)
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//Scale `t' by `(sx, sy)',缩放默认是以视图的中心点为轴的
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CGAffineTransform transform = CGAffineTransformScale(imageContainView.transform, 1.2, 1.2);
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[UIView beginAnimations:@"scale" context:nil];
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[UIView setAnimationDuration:2];
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[UIView setAnimationDelegate:self];
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[imageContainView setTransform:transform];
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[UIView commitAnimations];
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}
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- (IBAction)button6_click:(id)sender {
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//根据当前的动画取反(Invert)
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//注意:只针对setTransform的视图,并且是取反而不是还原,其它动画无法取反
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CGAffineTransform transform = CGAffineTransformInvert(imageContainView.transform);
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[UIView beginAnimations:@"Invert" context:nil];
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[UIView setAnimationDuration:2];
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[UIView setAnimationDelegate:self];
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[imageContainView setTransform:transform];
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[UIView commitAnimations];
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}
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- (void)startAnimation:(NSString*) transitionType {
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CATransition *transition = [CATransition animation];
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transition.delegate = self;
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transition.duration = 2;
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//时间函数(控制动画速度)
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transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
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/* The name of the transition. Current legal transition types include
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* `fade', `moveIn', `push' and `reveal'. Defaults to `fade'. 另外还有一些私有动画 “pageCurl”(向上翻页) “pageUnCurl”(向下翻页)、"rippleEffect"(水滴) "suckEffect"(收缩抽走) "cube"(立方体) "oglFilp"(上下翻转) "cameraIrisHollowOpen"(镜头开) "cameraIrisHollowClose"(镜头关)*/
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transition.type = transitionType;
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/* An optional subtype for the transition. E.g. used to specify the
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* transition direction for motion-based transitions, in which case
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* the legal values are `fromLeft', `fromRight', `fromTop' and
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* `fromBottom'. */
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transition.subtype = kCATransitionFromTop;
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[imageContainView.layer addAnimation:transition forKey:@"transition"];
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}
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- (IBAction)button7_click:(id)sender {
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[self startAnimation:kCATransitionFade];
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}
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- (IBAction)button8_click:(id)sender {
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[self startAnimation:kCATransitionMoveIn];
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}
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- (IBAction)button9_click:(id)sender {
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[self startAnimation:kCATransitionPush];
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}
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- (IBAction)button10_click:(id)sender {
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[self startAnimation:kCATransitionReveal];
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}
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- (IBAction)button11_click:(id)sender {
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[self startAnimation:@"pageCurl"];
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}
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- (IBAction)button12_click:(id)sender {
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[self startAnimation:@"pageUnCurl"];
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}
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- (IBAction)button13_click:(id)sender {
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[self startAnimation:@"rippleEffect"];
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}
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- (IBAction)button14_click:(id)sender {
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[self startAnimation:@"suckEffect"];
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}
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- (IBAction)button15_click:(id)sender {
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[self startAnimation:@"cube"];
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}
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- (IBAction)button16_click:(id)sender {
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[self startAnimation:@"olgFilp"];
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}
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- (void)animationWillStart:(CAAnimation *)anim {
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NSLog(@"animationWillStart");
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}
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-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
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NSLog(@"animationDidStop");
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}
项目结构如下
运行截图
可以看到,fade和oglFilp是无效了,另外cameraIrisHollowOpen和cameraIrisHollowClose也是无效的。
还有当view旋转一定的角度之后,翻页动画也是有问题的。
文章来源: blog.csdn.net,作者:福州-司马懿,版权归原作者所有,如需转载,请联系作者。
原文链接:blog.csdn.net/chy555chy/article/details/51648298
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