Allow the developer to rotate View during a predefined time or start an infinite rotation and stop it.

UIView+Rotation.h

//--------------------------------------------------------
// 
//--------------------------------------------------------
// Project     : 
// File        : UIView+Rotation.h
// Created     : $ 23/05/12 $
// Maintainer  : $ Rémi LAVEDRINE $
//
// Copyright Rémi LAVEDRINE 2004-2012, All Rights Reserved
//
// This software is the confidential and proprietary
// information of Rémi LAVEDRINE.
// You shall not disclose such Confidential Information
// and shall use it only in accordance with the terms
// of the license agreement you entered into with
// Rémi LAVEDRINE.
//--------------------------------------------------------
// 
// @brief
// 

#import <UIKit/UIKit.h>

@interface UIView (Rotation)

- (void)rotate:(CGFloat)angle during:(NSTimeInterval)duration;
- (void)infiniteRotation;
- (void)stopInfiniteRotation;

@end

UIView+Rotation.m

//
//  UIView+Rotation.m
//  
//
//  Created by Rémi LAVEDRINE on 23/05/12.
//  Copyright (c) 2012 Rémi LAVEDRINE. All rights reserved.
//

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

@implementation UIView (Rotation)

- (void)rotate:(CGFloat)angle during:(NSTimeInterval)duration{
  [UIView beginAnimations:nil context:NULL];
  [UIView setAnimationDuration:duration];
  [UIView setAnimationBeginsFromCurrentState:YES];
  
  [UIView animateWithDuration:duration
                        delay:0
                      options:UIViewAnimationOptionCurveLinear
                   animations:^{
                     
                     CGAffineTransform transform = CGAffineTransformMakeRotation(angle);
                     self.transform = transform;
                     // Commit the changes
                     [UIView commitAnimations];
                     
                     // Animate squash
                   }completion:^(BOOL finished){
                     if (finished) {
                       // [[NSNotificationCenter defaultCenter] postNotificationName:kRotationDone object:nil];
                     }
                   }];
}

- (void)rotateToValue:(NSNumber *)value during:(NSTimeInterval)duration cumulative:(BOOL)isCumulative repeatCount:(CGFloat)repeatCount{
  CABasicAnimation* rotationAnimation;
  rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
  rotationAnimation.toValue = value;
  rotationAnimation.duration = duration;
  rotationAnimation.cumulative = isCumulative;
  rotationAnimation.repeatCount = repeatCount; 
  
  rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
  
  [self.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];
}

#define ONE_ROTATION_DURATION 1.0
/**
 @brief Rotate through an infinite loop in trigonometrical direction. 
 @author : Rémi Lavedrine
 @date : 23/05/2012 
 @remarks : <#(optional)#>
 */
- (void)infiniteRotation{
  [self rotateToValue:[NSNumber numberWithFloat: -M_PI * 2.0 /* full rotation*/ * 1 * 1.0 ] 
               during:ONE_ROTATION_DURATION 
           cumulative:YES 
          repeatCount:MAXFLOAT];
}

/**
 @brief Stop the loop. 
 @author : Rémi Lavedrine
 @date : 23/05/2012 
 @remarks : <#(optional)#>
 */
- (void)stopInfiniteRotation {
  [self rotateToValue:[NSNumber numberWithFloat: -M_PI * 2.0 /* full rotation*/ * 1 * 1.0 ]
               during:ONE_ROTATION_DURATION
           cumulative:NO
          repeatCount:0];
}


@end