IOS 播放动态Gif图片

    //创建UIImageView，添加到界面
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, 100, 100)];
    [self.view addSubview:imageView];
    //创建一个数组，数组中按顺序添加要播放的图片（图片为静态的图片）
    NSMutableArray *imgArray = [NSMutableArray array];
    for (int i=1; i<7; i++) {
        UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"clock%02d.png",i]];
        [imgArray addObject:image];
    }
    //把存有UIImage的数组赋给动画图片数组
    imageView.animationImages = imgArray;
    //设置执行一次完整动画的时长
    imageView.animationDuration = 6*0.15;
    //动画重复次数 （0为重复播放）
    imageView.animationRepeatCount = 0;
    //开始播放动画
    [imageView startAnimating];
    //停止播放动画  - (void)stopAnimating;
//判断是否正在执行动画  - (BOOL)isAnimating;

    //得到图片的路径
    NSString *path = [[NSBundle mainBundle] pathForResource:@"happy" ofType:@"gif"];
    //将图片转为NSData
    NSData *gifData = [NSData dataWithContentsOfFile:path];
    //创建一个webView，添加到界面
    UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 150, 200, 200)];
    [self.view addSubview:webView];
    //自动调整尺寸
    webView.scalesPageToFit = YES;
    //禁止滚动
webView.scrollView.scrollEnabled = NO;
    //设置透明效果
    webView.backgroundColor = [UIColor clearColor];
webView.opaque = 0;
    //加载数据
    [webView loadData:gifData MIMEType:@"image/gif" textEncodingName:nil baseURL:nil];

//方式一：显示本地Gif图片
    //将图片转为NSData数据
    NSData *localData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"bird" ofType:@"gif"]];
    //创建一个第三方的View显示图片
    GifView *dataView = [[GifView alloc] initWithFrame:CGRectMake(0, 300, 200, 100) data:localData];
    [self.view addSubview:dataView];

//方式二：显示本地Gif图片
    //得到图片的路径
NSString *path = [[NSBundle mainBundle] pathForResource:@"cat" ofType:@"gif"];
//创建一个第三方的View显示图片
    GifView *dataView2 = [[GifView alloc] initWithFrame:CGRectMake(200, 300, 150, 100) filePath:path];
    [self.view addSubview:dataView2];

//方式三：显示从网络获取的Gif图片
    // 网络图片
    NSData *urlData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://pic19.nipic.com/20120222/8072717_124734762000_2.gif"]];
    //创建一个第三方的View显示图片
    GifView *dataViewWeb = [[GifView alloc] initWithFrame:CGRectMake(20, 420, 280, 100) data:urlData];
    [self.view addSubview:dataViewWeb];

#import <UIKit/UIKit.h>
#import <ImageIO/ImageIO.h>

@interface GifView : UIView {
    CGImageSourceRef gif;
    NSDictionary *gifProperties;
    size_t index;
    size_t count;
    NSTimer *timer;
}

- (id)initWithFrame:(CGRect)frame filePath:(NSString *)_filePath;
- (id)initWithFrame:(CGRect)frame data:(NSData *)_data;

@end

#import "GifView.h"
#import <QuartzCore/QuartzCore.h>

@implementation GifView

- (id)initWithFrame:(CGRect)frame filePath:(NSString *)_filePath{
    
    self = [super initWithFrame:frame];
    if (self) {
        
        gifProperties = [[NSDictionary dictionaryWithObject:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:0] forKey:(NSString *)kCGImagePropertyGIFLoopCount]
                                                     forKey:(NSString *)kCGImagePropertyGIFDictionary] retain];
        gif = CGImageSourceCreateWithURL((CFURLRef)[NSURL fileURLWithPath:_filePath], (CFDictionaryRef)gifProperties);
        count =CGImageSourceGetCount(gif);
        timer = [NSTimer scheduledTimerWithTimeInterval:0.12 target:self selector:@selector(play) userInfo:nil repeats:YES];
        [timer fire];
    }
    return self;
}

- (id)initWithFrame:(CGRect)frame data:(NSData *)_data{
    
    self = [super initWithFrame:frame];
    if (self) {
        
        gifProperties = [[NSDictionary dictionaryWithObject:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:0] forKey:(NSString *)kCGImagePropertyGIFLoopCount]
                                                     forKey:(NSString *)kCGImagePropertyGIFDictionary] retain];
       gif = CGImageSourceCreateWithData((CFDataRef)_data, (CFDictionaryRef)gifProperties);
        count =CGImageSourceGetCount(gif);
        timer = [NSTimer scheduledTimerWithTimeInterval:0.12 target:self selector:@selector(play) userInfo:nil repeats:YES];
        [timer fire];
    }
    return self;
}

-(void)play
{
    index ++;
    index = index%count;
    CGImageRef ref = CGImageSourceCreateImageAtIndex(gif, index, (CFDictionaryRef)gifProperties);
    self.layer.contents = (id)ref;
    CFRelease(ref);
}
-(void)removeFromSuperview
{
    NSLog(@"removeFromSuperview");
    [timer invalidate];
    timer = nil;
    [super removeFromSuperview];
}
- (void)dealloc {
    NSLog(@"dealloc");
    CFRelease(gif);
    [gifProperties release];
    [super dealloc];
}
@end