我在之前的一篇博客中《iOS UIView动画详解(Swift)》讲解了使用Swift来实现UIView类下面提供的多种动画效果,如位置动画、旋转动画、缩放动画、颜色动画、透明度动画等等。为了这个题目的完整性,今天我使用Objective-C来完全重写以上的所有的动画。项目案例已经上传至:https://github.com/chenyufeng1991/iOS-UIView-Animation 中的Animation-OC文件夹下,另一个目录下则是Swift实现的动画。
(1)位置动画
PositionAnimation可以实现View的移动,最简单的就是X轴,Y轴的移动。这里实现几个小方块的移动。
- #import "PositionViewController.h"
- @interface PositionViewController ()
- @property (weak, nonatomic) IBOutlet UIView *redSquare;
- @property (weak, nonatomic) IBOutlet UIView *greenSquare;
- @end
- @implementation PositionViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- }
- - (void)viewWillAppear:(BOOL)animated{
- [super viewWillAppear:animated];
- [UIView animateWithDuration:2 animations:^{
- self.redSquare.frame = CGRectMake(self.redSquare.frame.origin.x, 400, self.redSquare.bounds.size.width, self.redSquare.bounds.size.height);
- self.greenSquare.frame = CGRectMake(200, 500, self.greenSquare.bounds.size.width, self.greenSquare.bounds.size.height);
- }];
- }
- @end
(2)透明度动画
透明度动画可以让某个View的透明度在0-1之间改变。透明度为0表示全透明,看不见了。透明度为1表示和正常情况下一样。
- #import "OpacityViewController.h"
- @interface OpacityViewController ()
- @property (weak, nonatomic) IBOutlet UIView *redSquare;
- @end
- @implementation OpacityViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- }
- - (void)viewWillAppear:(BOOL)animated{
- [super viewWillAppear:animated];
- [UIView animateWithDuration:2 animations:^{
- self.redSquare.alpha = 0.3;
- }];
- }
- @end
(3)缩放动画
缩放动画可以让一个View的大小发生改变,按比例的放大缩小。
- #import "ScaleViewController.h"
- @interface ScaleViewController ()
- @property (weak, nonatomic) IBOutlet UIView *redSquare;
- @end
- @implementation ScaleViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- }
- - (void)viewWillAppear:(BOOL)animated{
- [super viewWillAppear:animated];
- [UIView animateWithDuration:2 animations:^{
- //宽高缩放比;
- self.redSquare.transform = CGAffineTransformMakeScale(2, 3);
- }];
- }
- @end
(4)颜色动画
颜色动画可以让一个View在一个时间间隔内发生颜色的渐变,进行颜色的过渡。
- #import "ColorViewController.h"
- @interface ColorViewController ()
- @property (weak, nonatomic) IBOutlet UIView *greenSquare;
- @end
- @implementation ColorViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- }
- - (void)viewWillAppear:(BOOL)animated{
- [super viewWillAppear:animated];
- [UIView animateWithDuration:2 animations:^{
- //宽高缩放比;
- self.greenSquare.backgroundColor = [UIColor brownColor];
- }];
- }
- @end
(5)旋转动画
可以让某个View绕圆点进行旋转。
- #import "RotationViewController.h"
- @interface RotationViewController ()
- @property (weak, nonatomic) IBOutlet UIView *greenSquare;//旋转一次;
- @property (weak, nonatomic) IBOutlet UIView *redSquare;//旋转无数次;
- @end
- @implementation RotationViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- }
- - (void)viewWillAppear:(BOOL)animated{
- [super viewWillAppear:animated];
- [self spinGreenSquare];
- [self spinRedSquare];
- }
- - (void)spinGreenSquare{
- [UIView animateWithDuration:2 animations:^{
- self.greenSquare.transform = CGAffineTransformRotate(self.greenSquare.transform, M_PI);//一个PI,180度;
- } completion:^(BOOL finished) {
- }];
- }
- - (void)spinRedSquare{
- [UIView animateWithDuration:1 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
- self.redSquare.transform = CGAffineTransformRotate(self.redSquare.transform, 360);//一个PI,180度;
- } completion:^(BOOL finished) {
- [self spinRedSquare];
- }];
- }
- @end
(6)重复动画
该动画可以让某个动画过程反复执行。
- #import "RepeatViewController.h"
- @interface RepeatViewController ()
- @property (weak, nonatomic) IBOutlet UIView *greenSquare;
- @property (weak, nonatomic) IBOutlet UIView *redSquare;
- @end
- @implementation RepeatViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- }
- - (void)viewWillAppear:(BOOL)animated{
- [super viewWillAppear:animated];
- [UIView animateWithDuration:2 delay:0 options:UIViewAnimationOptionRepeat animations:^{
- self.greenSquare.frame = CGRectMake(250, self.greenSquare.frame.origin.y, self.greenSquare.frame.size.width, self.greenSquare.frame.size.height);
- } completion:^(BOOL finished) {
- }];
- [UIView animateWithDuration:2 delay:0 options:UIViewAnimationOptionRepeat|UIViewAnimationOptionAutoreverse animations:^{
- self.redSquare.frame = CGRectMake(250, self.redSquare.frame.origin.y, self.redSquare.frame.size.width, self.redSquare.frame.size.height);
- } completion:^(BOOL finished) {
- }];
- }
- @end
(7)缓冲动画
这里主要使用了贝塞尔曲线的效果来改变View动画的速率效果。大家可以实践一下。
- #import "EasingViewController.h"
- @interface EasingViewController ()
- @property (weak, nonatomic) IBOutlet UIView *greenSquare;
- @property (weak, nonatomic) IBOutlet UIView *redSquare;
- @end
- @implementation EasingViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- }
- - (void)viewWillAppear:(BOOL)animated{
- [super viewWillAppear:animated];
- //主要是设置options这个参数;
- [UIView animateWithDuration:2 delay:0 options:UIViewAnimationOptionCurveEaseIn animations:^{
- self.greenSquare.frame = CGRectMake(250, self.greenSquare.frame.origin.y, self.greenSquare.frame.size.width, self.greenSquare.frame.size.height);
- } completion:nil];
- [UIView animateWithDuration:2 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
- self.redSquare.frame = CGRectMake(250, self.redSquare.frame.origin.y, self.redSquare.frame.size.width, self.redSquare.frame.size.height);
- } completion:nil];
- }
- @end
(8)弹簧动画
该动画执行过程中类似弹簧的真实效果,你可以设置弹簧的阻尼和初始速度来达到非常逼真的弹簧抖动。
- #import "SpringViewController.h"
- @interface SpringViewController ()
- @property (weak, nonatomic) IBOutlet UIView *greenSquare;
- @property (weak, nonatomic) IBOutlet UIView *redSquare;
- @end
- @implementation SpringViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- }
- - (void)viewWillAppear:(BOOL)animated{
- [super viewWillAppear:animated];
- //通过设置参数即可改变不同的状态;
- [UIView animateWithDuration:2 delay:0.5 usingSpringWithDamping:0.2 initialSpringVelocity:0 options:UIViewAnimationOptionTransitionNone animations:^{
- self.greenSquare.frame = CGRectMake(250, self.greenSquare.frame.origin.y, self.greenSquare.frame.size.width, self.greenSquare.frame.size.height);
- } completion:nil];
- [UIView animateWithDuration:2 delay:0.5 usingSpringWithDamping:0.2 initialSpringVelocity:1 options:UIViewAnimationOptionTransitionNone animations:^{
- self.redSquare.frame = CGRectMake(250, self.redSquare.frame.origin.y, self.redSquare.frame.size.width, self.redSquare.frame.size.height);
- } completion:nil];
- }
- @end
(9)图片旋转
在我们实际的需求中,我们可能需要让图片在移动旋转之前就处于左转90度、右转90度、旋转180度的状态,然后在此基础上再进行其他的动画。实现如下:
- #import "ImageRotationViewController.h"
- #define kScreenWidth [[UIScreen mainScreen] bounds].size.width
- #define kScreenHeight [[UIScreen mainScreen] bounds].size.height
- /**
- * 在该示例中对UIImage进行旋转,注意不是对UIImageView旋转,这可以满足更多自定义的需求;
- */
- @interface ImageRotationViewController ()
- @end
- @implementation ImageRotationViewController
- - (void)viewDidLoad {
- [super viewDidLoad];
- /**
- UIImageOrientationUp, // default orientation
- UIImageOrientationDown, // 180 deg rotation
- UIImageOrientationLeft, // 90 deg CCW
- UIImageOrientationRight, // 90 deg CW
- UIImageOrientationUpMirrored, // as above but image mirrored along other axis. horizontal flip
- UIImageOrientationDownMirrored, // horizontal flip
- UIImageOrientationLeftMirrored, // vertical flip
- UIImageOrientationRightMirrored, // vertical flip
- */
- UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, kScreenHeight / 2, 80, kScreenWidth)];
- UIImage *image = [UIImage imageNamed:@"1"];
- /**
- * 以下方法让一张图片一开始就处于旋转状态,而不是正放的状态;注意是对UIImage的操作,而不是对UIimageView控件的操作;最后再把image放入控件即可。
- */
- UIImage *imageRotate = [UIImage imageWithCGImage:image.CGImage scale:1 orientation:UIImageOrientationLeft];
- [imageView setImage:imageRotate];
- [self.view addSubview:imageView];
- [UIView animateWithDuration:2 animations:^{
- imageView.transform = CGAffineTransformRotate(imageView.transform, M_PI_2);
- imageView.frame = CGRectMake(0, 64, kScreenWidth, 80);
- }];
- }
- @end
这里实现的动画都是非常的简单,大家可以通过下载代码自己尝试一下。后续我会给大家讲解更为高级炫酷的动画。尽请期待。