////  SCGIFImageView.h//  TestGIF////  Created by shichangone on 11-7-12.//  Copyright 2011 __MyCompanyName__. All rights reserved.///* Example: NSString* filePath  = [[NSBundle mainBundle] pathForResource:@"loading_gray" ofType:@"gif"]; NSData* imageData   = [NSData dataWithContentsOfFile:filePath]; [self.imageView setData:imageData]; */#import <UIKit/UIKit.h>@interface SCGIFImageFrame : NSObject {    }@property (nonatomic) double duration;@property (nonatomic, retain) UIImage* image;@end@interface SCGIFImageView : UIImageView {    NSInteger _currentImageIndex;}@property (nonatomic, retain) NSArray* imageFrameArray;@property (nonatomic, retain) NSTimer* timer;//Setting this value to pause or continue animation;@property (nonatomic) BOOL animating;- (void)setData:(NSData*)imageData;- (void)closeAnim;- (void)startAnim;- (void)stopAnim;@end

////  SCGIFImageView.m//  TestGIF////  Created by shichangone on 11-7-12.//  Copyright 2011 __MyCompanyName__. All rights reserved.//#import "SCGIFImageView.h"#import <ImageIO/ImageIO.h>@implementation SCGIFImageFrame@synthesize image = _image;@synthesize duration = _duration;- (void)dealloc{    [_image release];    [super dealloc];}@end@interface SCGIFImageView ()- (void)resetTimer;- (void)showNextImage;@end@implementation SCGIFImageView@synthesize imageFrameArray = _imageFrameArray;@synthesize timer = _timer;@synthesize animating = _animating;- (void)closeAnim{    [self release];}- (void)stopAnim{    [self resetTimer];    [_timer release];}- (void)startAnim{    [self resetTimer];    _currentImageIndex = -1;    _animating = YES;    [self showNextImage];}- (void)dealloc{    [self resetTimer];    [_imageFrameArray release];    [_timer release];    [super dealloc];}- (void)resetTimer {    if (_timer && _timer.isValid) {        [_timer invalidate];    }        self.timer = nil;}- (void)setData:(NSData *)imageData {    if (!imageData) {        return;    }    [self resetTimer];        CGImageSourceRef source = CGImageSourceCreateWithData((CFDataRef)imageData, NULL);    size_t count = CGImageSourceGetCount(source);        NSMutableArray* tmpArray = [NSMutableArray array];        for (size_t i = 0; i < count; i++) {        SCGIFImageFrame* gifImage = [[[SCGIFImageFrame alloc] init] autorelease];                CGImageRef image = CGImageSourceCreateImageAtIndex(source, i, NULL);        gifImage.image = [UIImage imageWithCGImage:image scale:[UIScreen mainScreen].scale orientation:UIImageOrientationUp];                NSDictionary* frameProperties = [(NSDictionary*)CGImageSourceCopyPropertiesAtIndex(source, i, NULL) autorelease];        gifImage.duration = [[[frameProperties objectForKey:(NSString*)kCGImagePropertyGIFDictionary] objectForKey:(NSString*)kCGImagePropertyGIFDelayTime] doubleValue];        gifImage.duration = MAX(gifImage.duration, 0.01);                [tmpArray addObject:gifImage];                CGImageRelease(image);    }    CFRelease(source);        self.imageFrameArray = nil;    if (tmpArray.count > 1) {        self.imageFrameArray = tmpArray;        _currentImageIndex = -1;        _animating = YES;        [self showNextImage];    } else {        self.image = [UIImage imageWithData:imageData];    }}- (void)setImage:(UIImage *)image {    [super setImage:image];    [self resetTimer];    self.imageFrameArray = nil;    _animating = NO;}- (void)showNextImage {    if (!_animating) {        return;    }        _currentImageIndex = (++_currentImageIndex) % _imageFrameArray.count;    SCGIFImageFrame* gifImage = [_imageFrameArray objectAtIndex:_currentImageIndex];    [super setImage:[gifImage image]];    self.timer = [NSTimer scheduledTimerWithTimeInterval:gifImage.duration target:self selector:@selector(showNextImage) userInfo:nil repeats:NO];}- (void)setAnimating:(BOOL)animating {    if (_imageFrameArray.count < 2) {        _animating = animating;        return;    }        if (!_animating && animating) {        _animating = animating;        if (!_timer) {            [self showNextImage];        }    } else if (_animating && !animating) {        _animating = animating;        [self resetTimer];    }}@end