Animasi rotasi 360 derajat UIView Infinite?

Saya mencoba memutar UIImageView360 derajat, dan telah melihat beberapa tutorial online. Saya tidak bisa membuat mereka bekerja, tanpa UIViewberhenti, atau melompat ke posisi baru.

• Bagaimana saya bisa mencapai ini?

Hal terbaru yang saya coba adalah:

[UIView animateWithDuration:1.0
                      delay:0.0
                    options:0
                 animations:^{
                     imageToMove.transform = CGAffineTransformMakeRotation(M_PI);
                 } 
                 completion:^(BOOL finished){
                     NSLog(@"Done!");
                 }];

Tetapi jika saya menggunakan 2 * pi, itu tidak bergerak sama sekali (karena itu posisi yang sama). Jika saya mencoba melakukan hanya pi (180 derajat), itu berhasil, tetapi jika saya memanggil metode lagi, itu berputar mundur.

EDIT :

[UIView animateWithDuration:1.0
                      delay:0.0
                    options:0
                 animations:^{
                     [UIView setAnimationRepeatCount:HUGE_VALF];
                     [UIView setAnimationBeginsFromCurrentState:YES];
                     imageToMove.transform = CGAffineTransformMakeRotation(M_PI);
                 } 
                 completion:^(BOOL finished){
                     NSLog(@"Done!");
                 }];

juga tidak bekerja. Ia pergi ke 180derajat, berhenti selama sepersekian detik, lalu kembali ke 0derajat sebelum mulai lagi.

Menemukan metode (saya memodifikasinya sedikit) yang bekerja dengan baik untuk saya: iphone UIImageView rotasi

#import <QuartzCore/QuartzCore.h>

- (void) runSpinAnimationOnView:(UIView*)view duration:(CGFloat)duration rotations:(CGFloat)rotations repeat:(float)repeat {
    CABasicAnimation* rotationAnimation;
    rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
    rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2.0 /* full rotation*/ * rotations * duration ];
    rotationAnimation.duration = duration;
    rotationAnimation.cumulative = YES;
    rotationAnimation.repeatCount = repeat ? HUGE_VALF : 0;

    [view.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];
}

Kudos kepada Richard J. Ross III untuk ide itu, tetapi saya menemukan bahwa kodenya tidak cukup yang saya butuhkan. Default untuk options, saya percaya, adalah memberi Anda UIViewAnimationOptionCurveEaseInOut, yang tidak terlihat benar dalam animasi berkelanjutan. Juga, saya menambahkan tanda centang sehingga saya dapat menghentikan animasi saya pada perempat putaran genap jika saya membutuhkan (bukan tak terbatas , tetapi durasi tidak terbatas ), dan membuat peningkatan akselerasi naik selama 90 derajat pertama, dan melambat selama 90 derajat terakhir (setelah berhenti diminta):

// an ivar for your class:
BOOL animating;

- (void)spinWithOptions:(UIViewAnimationOptions)options {
   // this spin completes 360 degrees every 2 seconds
   [UIView animateWithDuration:0.5
                         delay:0
                       options:options
                    animations:^{
                       self.imageToMove.transform = CGAffineTransformRotate(imageToMove.transform, M_PI / 2);
                    }
                    completion:^(BOOL finished) {
                       if (finished) {
                          if (animating) {
                             // if flag still set, keep spinning with constant speed
                             [self spinWithOptions: UIViewAnimationOptionCurveLinear];
                          } else if (options != UIViewAnimationOptionCurveEaseOut) {
                             // one last spin, with deceleration
                             [self spinWithOptions: UIViewAnimationOptionCurveEaseOut];
                          }
                       }
                    }];
}

- (void)startSpin {
   if (!animating) {
      animating = YES;
      [self spinWithOptions: UIViewAnimationOptionCurveEaseIn];
   }
}

- (void)stopSpin {
    // set the flag to stop spinning after one last 90 degree increment
    animating = NO;
}

Memperbarui

Saya menambahkan kemampuan untuk menangani permintaan untuk mulai berputar lagi ( startSpin), sementara putaran sebelumnya mereda (menyelesaikan). Contoh proyek di sini di Github .

Di Swift, Anda dapat menggunakan kode berikut untuk rotasi tak terbatas:

Cepat 4

extension UIView {
    private static let kRotationAnimationKey = "rotationanimationkey"

    func rotate(duration: Double = 1) {
        if layer.animation(forKey: UIView.kRotationAnimationKey) == nil {
            let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation")

            rotationAnimation.fromValue = 0.0
            rotationAnimation.toValue = Float.pi * 2.0
            rotationAnimation.duration = duration
            rotationAnimation.repeatCount = Float.infinity

            layer.add(rotationAnimation, forKey: UIView.kRotationAnimationKey)
        }
    }

    func stopRotating() {
        if layer.animation(forKey: UIView.kRotationAnimationKey) != nil {
            layer.removeAnimation(forKey: UIView.kRotationAnimationKey)
        }
    }
}

Cepat 3

let kRotationAnimationKey = "com.myapplication.rotationanimationkey" // Any key

func rotateView(view: UIView, duration: Double = 1) {
    if view.layer.animationForKey(kRotationAnimationKey) == nil {
        let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation")

        rotationAnimation.fromValue = 0.0
        rotationAnimation.toValue = Float(M_PI * 2.0)
        rotationAnimation.duration = duration
        rotationAnimation.repeatCount = Float.infinity

        view.layer.addAnimation(rotationAnimation, forKey: kRotationAnimationKey)
    }
}

Berhenti seperti:

func stopRotatingView(view: UIView) {
    if view.layer.animationForKey(kRotationAnimationKey) != nil {
        view.layer.removeAnimationForKey(kRotationAnimationKey)
    }
}

Jawaban Nate di atas sangat ideal untuk menghentikan dan memulai animasi dan memberikan kontrol yang lebih baik. Saya tertarik mengapa Anda tidak bekerja dan dia tidak. Saya ingin membagikan temuan saya di sini dan versi kode yang lebih sederhana yang akan menghidupkan UIView terus menerus tanpa berhenti.

Ini adalah kode yang saya gunakan,

- (void)rotateImageView
{
    [UIView animateWithDuration:1 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
        [self.imageView setTransform:CGAffineTransformRotate(self.imageView.transform, M_PI_2)];
    }completion:^(BOOL finished){
        if (finished) {
            [self rotateImageView];
        }
    }];
}

Saya menggunakan 'CGAffineTransformRotate' bukan 'CGAffineTransformMakeRotation' karena yang pertama mengembalikan hasil yang disimpan sebagai hasil animasi. Ini akan mencegah lompatan atau pengaturan ulang tampilan selama animasi.

Hal lain adalah tidak menggunakan 'UIViewAnimationOptionRepeat' karena pada akhir animasi sebelum mulai berulang, itu me-reset transformasi membuat tampilan melompat kembali ke posisi semula. Alih-alih mengulang, Anda berulang sehingga transformasi tidak pernah mengatur ulang ke nilai asli karena blok animasi hampir tidak pernah berakhir.

Dan yang terakhir adalah, Anda harus mengubah tampilan dalam langkah 90 derajat (M_PI / 2) alih-alih 360 atau 180 derajat (2 * M_PI atau M_PI). Karena transformasi terjadi sebagai perkalian matriks nilai sinus dan nilai kosinus.

t' =  [ cos(angle) sin(angle) -sin(angle) cos(angle) 0 0 ] * t

Jadi, katakanlah jika Anda menggunakan transformasi 180 derajat, cosinus dari 180 menghasilkan -1 yang membuat tampilan berubah dalam arah yang berlawanan setiap kali (Catatan-Nate juga akan memiliki masalah ini jika Anda mengubah nilai transformasi untuk M_PI). Transformasi 360 derajat hanya meminta pandangan untuk tetap di tempatnya, karenanya Anda tidak melihat rotasi sama sekali.

Jika yang ingin Anda lakukan adalah memutar gambar tanpa henti, ini berfungsi dengan sangat baik, dan sangat sederhana:

NSTimeInterval duration = 10.0f;
CGFloat angle = M_PI / 2.0f;
CGAffineTransform rotateTransform = CGAffineTransformRotate(imageView.transform, angle);

[UIView animateWithDuration:duration delay:0 options:UIViewAnimationOptionRepeat| UIViewAnimationOptionCurveLinear animations:^{
    imageView.transform = rotateTransform;
} completion:nil];

Dalam pengalaman saya, ini berfungsi dengan sempurna, tetapi pastikan gambar Anda mampu diputar di sekitar pusatnya tanpa ada offset, atau animasi gambar akan "melompat" begitu berhasil masuk ke PI.

Untuk mengubah arah putaran, ubah tanda angle( angle *= -1).

Perbarui Komentar oleh @AlexPretzlav membuat saya mengunjungi kembali ini, dan saya menyadari bahwa ketika saya menulis ini, gambar yang saya putar dicerminkan di sepanjang sumbu vertikal dan horizontal, artinya gambar itu memang hanya berputar 90 derajat dan kemudian mengatur ulang, meskipun tampak seperti itu terus berputar sepanjang jalan.

Jadi, jika gambar Anda seperti milik saya, ini akan bekerja dengan baik, namun, jika gambar tersebut tidak simetris, Anda akan melihat "jepret" kembali ke orientasi semula setelah 90 derajat.

Untuk memutar gambar yang tidak simetris, Anda lebih baik dengan jawaban yang diterima.

Salah satu solusi yang kurang elegan ini, seperti terlihat di bawah, akan benar-benar memutar gambar, tetapi mungkin ada gagap yang terlihat ketika animasi dimulai kembali:

- (void)spin
{
    NSTimeInterval duration = 0.5f;
    CGFloat angle = M_PI_2;
    CGAffineTransform rotateTransform = CGAffineTransformRotate(self.imageView.transform, angle);

    [UIView animateWithDuration:duration delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
        self.imageView.transform = rotateTransform;
    } completion:^(BOOL finished) {
        [self spin];
    }];
}

Anda juga bisa melakukan ini hanya dengan blok, seperti yang disarankan @ richard-j-ross-iii, tetapi Anda akan mendapatkan peringatan loop tetap karena blok tersebut menangkap dirinya sendiri:

__block void(^spin)() = ^{
    NSTimeInterval duration = 0.5f;
    CGFloat angle = M_PI_2;
    CGAffineTransform rotateTransform = CGAffineTransformRotate(self.imageView.transform, angle);

    [UIView animateWithDuration:duration delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
        self.imageView.transform = rotateTransform;
    } completion:^(BOOL finished) {
        spin();
    }];
};
spin();

Kontribusi saya dengan Swift Extension dari solusi yang diperiksa:

Cepat 4.0

extension UIView{
    func rotate() {
        let rotation : CABasicAnimation = CABasicAnimation(keyPath: "transform.rotation.z")
        rotation.toValue = NSNumber(value: Double.pi * 2)
        rotation.duration = 1
        rotation.isCumulative = true
        rotation.repeatCount = Float.greatestFiniteMagnitude
        self.layer.add(rotation, forKey: "rotationAnimation")
    }
}

Usang:

extension UIView{
    func rotate() {
        let rotation : CABasicAnimation = CABasicAnimation(keyPath: "transform.rotation.z")
        rotation.toValue = NSNumber(double: M_PI * 2)
        rotation.duration = 1
        rotation.cumulative = true
        rotation.repeatCount = FLT_MAX
        self.layer.addAnimation(rotation, forKey: "rotationAnimation")
    }
}

Jawaban hebat David Rysanek diperbarui ke Swift 4 :

import UIKit

extension UIView {

        func startRotating(duration: CFTimeInterval = 3, repeatCount: Float = Float.infinity, clockwise: Bool = true) {

            if self.layer.animation(forKey: "transform.rotation.z") != nil {
                return
            }

            let animation = CABasicAnimation(keyPath: "transform.rotation.z")
            let direction = clockwise ? 1.0 : -1.0
            animation.toValue = NSNumber(value: .pi * 2 * direction)
            animation.duration = duration
            animation.isCumulative = true
            animation.repeatCount = repeatCount
            self.layer.add(animation, forKey:"transform.rotation.z")
        }

        func stopRotating() {

            self.layer.removeAnimation(forKey: "transform.rotation.z")

        }   

    }
}

Gunakan seperempat putaran, dan tingkatkan putaran secara bertahap.

void (^block)() = ^{
    imageToMove.transform = CGAffineTransformRotate(imageToMove.transform, M_PI / 2);
}

void (^completion)(BOOL) = ^(BOOL finished){
    [UIView animateWithDuration:1.0
                          delay:0.0
                        options:0
                     animations:block
                     completion:completion];
}

completion(YES);

Ini bekerja untuk saya:

[UIView animateWithDuration:1.0
                animations:^
{
    self.imageView.transform = CGAffineTransformMakeRotation(M_PI);
    self.imageView.transform = CGAffineTransformMakeRotation(0);
}];

Saya telah menemukan kode yang bagus di repositori ini ,

Berikut adalah kode dari itu saya telah melakukan perubahan kecil sesuai dengan kebutuhan saya akan kecepatan :)

UIImageView + Rotate.h

#import <Foundation/Foundation.h>

@interface UIImageView (Rotate)
- (void)rotate360WithDuration:(CGFloat)duration repeatCount:(float)repeatCount;
- (void)pauseAnimations;
- (void)resumeAnimations;
- (void)stopAllAnimations;
@end

UIImageView + Rotate.m

#import <QuartzCore/QuartzCore.h>
#import "UIImageView+Rotate.h"

@implementation UIImageView (Rotate)

- (void)rotate360WithDuration:(CGFloat)duration repeatCount:(float)repeatCount
{

    CABasicAnimation *fullRotation;
    fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    fullRotation.fromValue = [NSNumber numberWithFloat:0];
    //fullRotation.toValue = [NSNumber numberWithFloat:(2*M_PI)];
    fullRotation.toValue = [NSNumber numberWithFloat:-(2*M_PI)]; // added this minus sign as i want to rotate it to anticlockwise
    fullRotation.duration = duration;
    fullRotation.speed = 2.0f;              // Changed rotation speed
    if (repeatCount == 0)
        fullRotation.repeatCount = MAXFLOAT;
    else
        fullRotation.repeatCount = repeatCount;

    [self.layer addAnimation:fullRotation forKey:@"360"];
}

//Not using this methods :)

- (void)stopAllAnimations
{

    [self.layer removeAllAnimations];
};

- (void)pauseAnimations
{

    [self pauseLayer:self.layer];
}

- (void)resumeAnimations
{

    [self resumeLayer:self.layer];
}

- (void)pauseLayer:(CALayer *)layer
{

    CFTimeInterval pausedTime = [layer convertTime:CACurrentMediaTime() fromLayer:nil];
    layer.speed = 0.0;
    layer.timeOffset = pausedTime;
}

- (void)resumeLayer:(CALayer *)layer
{

    CFTimeInterval pausedTime = [layer timeOffset];
    layer.speed = 1.0;
    layer.timeOffset = 0.0;
    layer.beginTime = 0.0;
    CFTimeInterval timeSincePause = [layer convertTime:CACurrentMediaTime() fromLayer:nil] - pausedTime;
    layer.beginTime = timeSincePause;
}

@end

Ini solusi cepat saya sebagai ekstensi UIView. Ini dapat dianggap sebagai simulasi perilaku UIActivityIndicator pada UIImageView apa pun.

import UIKit

extension UIView
{

    /**
    Starts rotating the view around Z axis.

    @param duration Duration of one full 360 degrees rotation. One second is default.
    @param repeatCount How many times the spin should be done. If not provided, the view will spin forever.
    @param clockwise Direction of the rotation. Default is clockwise (true).
     */
    func startZRotation(duration duration: CFTimeInterval = 1, repeatCount: Float = Float.infinity, clockwise: Bool = true)
    {
        if self.layer.animationForKey("transform.rotation.z") != nil {
            return
        }
        let animation = CABasicAnimation(keyPath: "transform.rotation.z")
        let direction = clockwise ? 1.0 : -1.0
        animation.toValue = NSNumber(double: M_PI * 2 * direction)
        animation.duration = duration
        animation.cumulative = true
        animation.repeatCount = repeatCount
        self.layer.addAnimation(animation, forKey:"transform.rotation.z")
    }


    /// Stop rotating the view around Z axis.
    func stopZRotation()
    {
        self.layer.removeAnimationForKey("transform.rotation.z")
    }

}

Versi Swift3:

extension UIView {

    func startRotate() {
        let rotation : CABasicAnimation = CABasicAnimation(keyPath: "transform.rotation.z")
        rotation.fromValue = 0
        rotation.toValue = NSNumber(value: M_PI * 2)
        rotation.duration = 2
        rotation.isCumulative = true
        rotation.repeatCount = FLT_MAX
        self.layer.add(rotation, forKey: "rotationAnimation")
    }

    func stopRotate() {
        self.layer.removeAnimation(forKey: "rotationAnimation")
    }
}

Dan ingat untuk memanggil startRotatedi viewWillAppeartidak viewDidLoad.

Anda juga dapat melakukan jenis animasi yang sama menggunakan UIView dan blok. Berikut adalah metode ekstensi kelas yang dapat memutar tampilan dengan sudut apa pun.

- (void)rotationWithDuration:(NSTimeInterval)duration angle:(CGFloat)angle options:(UIViewAnimationOptions)options
{
    // Repeat a quarter rotation as many times as needed to complete the full rotation
    CGFloat sign = angle > 0 ? 1 : -1;
    __block NSUInteger numberRepeats = floorf(fabsf(angle) / M_PI_2);
    CGFloat quarterDuration = duration * M_PI_2 / fabs(angle);

    CGFloat lastRotation = angle - sign * numberRepeats * M_PI_2;
    CGFloat lastDuration = duration - quarterDuration * numberRepeats;

    __block UIViewAnimationOptions startOptions = UIViewAnimationOptionBeginFromCurrentState;
    UIViewAnimationOptions endOptions = UIViewAnimationOptionBeginFromCurrentState;

    if (options & UIViewAnimationOptionCurveEaseIn || options == UIViewAnimationOptionCurveEaseInOut) {
        startOptions |= UIViewAnimationOptionCurveEaseIn;
    } else {
        startOptions |= UIViewAnimationOptionCurveLinear;
    }

    if (options & UIViewAnimationOptionCurveEaseOut || options == UIViewAnimationOptionCurveEaseInOut) {
        endOptions |= UIViewAnimationOptionCurveEaseOut;
    } else {
        endOptions |= UIViewAnimationOptionCurveLinear;
    }

    void (^lastRotationBlock)(void) = ^ {
        [UIView animateWithDuration:lastDuration 
                              delay:0 
                            options:endOptions 
                         animations:^{
                             self.transform = CGAffineTransformRotate(self.transform, lastRotation);
                         } 
                         completion:^(BOOL finished) {
                             NSLog(@"Animation completed");   
                         }
         ];
    };

    if (numberRepeats) {
        __block void (^quarterSpinningBlock)(void) = ^{ 
            [UIView animateWithDuration:quarterDuration 
                                  delay:0 
                                options:startOptions 
                             animations:^{
                                 self.transform = CGAffineTransformRotate(self.transform, M_PI_2);
                                 numberRepeats--; 
                             } 
                             completion:^(BOOL finished) {
                                 if (numberRepeats > 0) {
                                     startOptions = UIViewAnimationOptionBeginFromCurrentState | UIViewAnimationOptionCurveLinear;
                                     quarterSpinningBlock();
                                 } else {
                                     lastRotationBlock();
                                 }NSLog(@"Animation completed");   
                             }
             ];

        };

        quarterSpinningBlock();
    } else {
        lastRotationBlock();
    }
}

Jika ada yang menginginkan solusi nates tetapi dengan cepat, berikut ini terjemahan kasarnya:

class SomeClass: UIViewController {

    var animating : Bool = false
    @IBOutlet weak var activityIndicatorImage: UIImageView!

    func startSpinning() {
        if(!animating) {
            animating = true;
            spinWithOptions(UIViewAnimationOptions.CurveEaseIn);
        }
    }

    func stopSpinning() {
        animating = false
    }

    func spinWithOptions(options: UIViewAnimationOptions) {
        UIView.animateWithDuration(0.5, delay: 0.0, options: options, animations: { () -> Void in
            let val : CGFloat = CGFloat((M_PI / Double(2.0)));
            self.activityIndicatorImage.transform = CGAffineTransformRotate(self.activityIndicatorImage.transform,val)
        }) { (finished: Bool) -> Void in

            if(finished) {
                if(self.animating){
                    self.spinWithOptions(UIViewAnimationOptions.CurveLinear)
                } else if (options != UIViewAnimationOptions.CurveEaseOut) {
                    self.spinWithOptions(UIViewAnimationOptions.CurveEaseOut)
                }
            }

        }
    }

    override func viewDidLoad() {
        startSpinning()
    }
}

untuk xamarin ios:

public static void RotateAnimation (this UIView view, float duration=1, float rotations=1, float repeat=int.MaxValue)
{
    var rotationAnimation = CABasicAnimation.FromKeyPath ("transform.rotation.z");
    rotationAnimation.To = new NSNumber (Math.PI * 2.0 /* full rotation*/ * 1 * 1);
    rotationAnimation.Duration = 1;
    rotationAnimation.Cumulative = true;
    rotationAnimation.RepeatCount = int.MaxValue;
    rotationAnimation.RemovedOnCompletion = false;
    view.Layer.AddAnimation (rotationAnimation, "rotationAnimation");
}

Ini adalah bagaimana saya memutar 360 ke arah yang benar.

[UIView animateWithDuration:1.0f delay:0.0f options:UIViewAnimationOptionRepeat|UIViewAnimationOptionCurveLinear
                     animations:^{
                         [imageIndView setTransform:CGAffineTransformRotate([imageIndView transform], M_PI-0.00001f)];
                     } completion:nil];

Buat animasi

- (CABasicAnimation *)spinAnimationWithDuration:(CGFloat)duration clockwise:(BOOL)clockwise repeat:(BOOL)repeats
{
    CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
    anim.toValue = clockwise ? @(M_PI * 2.0) : @(M_PI * -2.0);
    anim.duration = duration;
    anim.cumulative = YES;
    anim.repeatCount = repeats ? CGFLOAT_MAX : 0;
    return anim;
}

Tambahkan ke tampilan seperti ini

CABasicAnimation *animation = [self spinAnimationWithDuration:1.0 clockwise:YES repeat:YES];
[self.spinningView.layer addAnimation:animation forKey:@"rotationAnimation"];

Bagaimana jawaban ini berbeda? Anda akan memiliki kode pembersih cara jika sebagian besar fungsi Anda mengembalikan objek, bukan hanya memanipulasi beberapa objek di sana-sini.

Ada beberapa cara untuk melakukan animasi 360 derajat dengan UIView.

Menggunakan CABasicAnimation

var rotationAnimation = CABasicAnimation()
rotationAnimation = CABasicAnimation.init(keyPath: "transform.rotation.z")
rotationAnimation.toValue = NSNumber(value: (Double.pi))
rotationAnimation.duration = 1.0
rotationAnimation.isCumulative = true
rotationAnimation.repeatCount = 100.0
view.layer.add(rotationAnimation, forKey: "rotationAnimation")

Berikut ini adalah fungsi ekstensi untuk UIView yang menangani operasi rotasi mulai & berhenti:

extension UIView {

    // Start rotation
    func startRotation() {
        let rotation = CABasicAnimation(keyPath: "transform.rotation.z")
        rotation.fromValue = 0
        rotation.toValue = NSNumber(value: Double.pi)
        rotation.duration = 1.0
        rotation.isCumulative = true
        rotation.repeatCount = FLT_MAX
        self.layer.add(rotation, forKey: "rotationAnimation")
    }

    // Stop rotation
    func stopRotation() {
        self.layer.removeAnimation(forKey: "rotationAnimation")
    }
}

Sekarang menggunakan, penutupan UIView.animation :

UIView.animate(withDuration: 0.5, animations: { 
      view.transform = CGAffineTransform(rotationAngle: (CGFloat(Double.pi)) 
}) { (isAnimationComplete) in
    // Animation completed 
}

Jawaban @ ram sangat membantu. Inilah versi Swift dari jawabannya.

Cepat 2

private func rotateImageView() {

    UIView.animateWithDuration(1, delay: 0, options: UIViewAnimationOptions.CurveLinear, animations: { () -> Void in
        self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, CGFloat(M_PI_2))
        }) { (finished) -> Void in
            if finished {
                self.rotateImageView()
            }
    }
}

Cepat 3,4,5

private func rotateImageView() {

    UIView.animate(withDuration: 1, delay: 0, options: UIView.AnimationOptions.curveLinear, animations: { () -> Void in
        self.imageView.transform = self.imageView.transform.rotated(by: .pi / 2)
    }) { (finished) -> Void in
        if finished {
            self.rotateImageView()
        }
    }
}

Saya telah mengembangkan kerangka animasi mengkilap yang dapat menghemat waktu Anda! Menggunakannya, animasi ini dapat dibuat dengan sangat mudah:

private var endlessRotater: EndlessAnimator!
override func viewDidAppear(animated: Bool) 
{
    super.viewDidAppear(animated)
    let rotationAnimation = AdditiveRotateAnimator(M_PI).to(targetView).duration(2.0).baseAnimation(.CurveLinear)
    endlessRotater = EndlessAnimator(rotationAnimation)
    endlessRotater.animate()
}

untuk menghentikan animasi ini cukup diatur nilkeendlessRotater .

Jika Anda tertarik, silakan lihat: https://github.com/hip4yes/Animatics

Swift 4 ,

func rotateImage(image: UIImageView) {
        UIView.animate(withDuration: 1, animations: {
            image.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
            image.transform = CGAffineTransform.identity
        }) { (completed) in
            self.rotateImage()
        }
    }

Ref

Cepat 4.0

func rotateImageView()
{
    UIView.animate(withDuration: 0.3, delay: 0, options: .curveLinear, animations: {() -> Void in
        self.imageView.transform = self.imageView.transform.rotated(by: .pi / 2)
    }, completion: {(_ finished: Bool) -> Void in
        if finished {
            rotateImageView()
        }
    })
}

Swift 5 UIView Extension menggunakan Animasi Keyframe

Pendekatan ini memungkinkan kita untuk secara langsung menggunakan UIView.AnimationOptions.repeat

public extension UIView {

    func animateRotation(duration: TimeInterval, repeat: Bool, completion: ((Bool) -> ())?) {

        var options = UIView.KeyframeAnimationOptions(rawValue: UIView.AnimationOptions.curveLinear.rawValue)

        if `repeat` {
            options.insert(.repeat)
        }

        UIView.animateKeyframes(withDuration: duration, delay: 0, options: options, animations: {

            UIView.addKeyframe(withRelativeStartTime: 0, relativeDuration: 0.25, animations: {
                self.transform = CGAffineTransform(rotationAngle: CGFloat.pi/2)
            })

            UIView.addKeyframe(withRelativeStartTime: 0.25, relativeDuration: 0.25, animations: {
                self.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
            })

            UIView.addKeyframe(withRelativeStartTime: 0.5, relativeDuration: 0.25, animations: {
                self.transform = CGAffineTransform(rotationAngle: 3*CGFloat.pi/2)
            })

            UIView.addKeyframe(withRelativeStartTime: 0.75, relativeDuration: 0.25, animations: {
                self.transform = CGAffineTransform(rotationAngle: 2*CGFloat.pi)
            })

        }, completion: completion)

    }

}

Cepat:

func runSpinAnimationOnView(view:UIView , duration:Float, rotations:Double, repeatt:Float ) ->()
    {
        let rotationAnimation=CABasicAnimation();

        rotationAnimation.keyPath="transform.rotation.z"

        let toValue = M_PI * 2.0 * rotations ;


        // passing it a float
        let someInterval = CFTimeInterval(duration)

        rotationAnimation.toValue=toValue;
        rotationAnimation.duration=someInterval;
        rotationAnimation.cumulative=true;
        rotationAnimation.repeatCount=repeatt;
        view.layer.addAnimation(rotationAnimation, forKey: "rotationAnimation")


    }

Swift 3:

 var rotationAnimation = CABasicAnimation()
     rotationAnimation = CABasicAnimation.init(keyPath: "transform.rotation.z")
     rotationAnimation.toValue = NSNumber(value: (M_PI * 2.0))
     rotationAnimation.duration = 2.0
     rotationAnimation.isCumulative = true
     rotationAnimation.repeatCount = 10.0
     view.layer.add(rotationAnimation, forKey: "rotationAnimation")

let val = CGFloat(M_PI_2)

UIView.animate(withDuration: 1, delay: 0, options: [.repeat, .curveLinear], animations: {
        self.viewToRotate.transform = self.viewToRotate.transform.rotated(by: val)
})

Saya pikir Anda sebaiknya menambahkan UIVIewKategori:

#import <QuartzCore/QuartzCore.h>
#import "UIView+Rotate.h"

Implementasi UIView (Putar)

• (void)remrotate360WithDuration:(CGFloat)duration repeatCount: (float)repeatCount
  {
      CABasicAnimation *fullRotation;
      fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
      fullRotation.fromValue = [NSNumber numberWithFloat:0];
      fullRotation.toValue = [NSNumber numberWithFloat:(2*M_PI)];
      // fullRotation.toValue = [NSNumber numberWithFloat:-(2*M_PI)]; // added this minus sign as i want to rotate it to anticlockwise
      fullRotation.duration = duration;
      fullRotation.speed = 2.0f; // Changed rotation speed
      if (repeatCount == 0)
          fullRotation.repeatCount = MAXFLOAT;
      else
          fullRotation.repeatCount = repeatCount;
  
      [self.layer addAnimation:fullRotation forKey:@"360"];
  }

Tidak menggunakan metode ini :)

• (void)remstopAllAnimations
  {
      [self.layer removeAllAnimations];
  };

• (void)rempauseAnimations
  {
      [self rempauseLayer:self.layer];
  }

• (void)remresumeAnimations
  {
      [self remresumeLayer:self.layer];
  }

• (void)rempauseLayer:(CALayer *)layer
  {
      CFTimeInterval pausedTime = [layer convertTime:CACurrentMediaTime() fromLayer:nil];
      layer.speed = 0.0;
      layer.timeOffset = pausedTime;
  }

• (void)remresumeLayer:(CALayer *)layer
  {
      CFTimeInterval pausedTime = [layer timeOffset];
      layer.speed = 1.0;
      layer.timeOffset = 0.0;
      layer.beginTime = 0.0;
      CFTimeInterval timeSincePause = [layer convertTime:CACurrentMediaTime() fromLayer:nil] - pausedTime;
      layer.beginTime = timeSincePause;
  }