iOS GIF图片单次播放

改自swift版本: https://www.jianshu.com/p/0f39114a7f8e

首先导入<ImageIO/ImageIO.h>

创建imageview,然后:

// 1.获取CFDataRef类型

    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"demo.gif" ofType:nil];

    id fileData = [NSData dataWithContentsOfFile:filePath];

    // 2.根据Data获取CGImageSource对象

    CGImageSourceRef imageSource = CGImageSourceCreateWithData((CFDataRef)fileData, nil);

    // 3.获取gif图片中图片的个数

    NSIntegerframeCount = CGImageSourceGetCount(imageSource);

    // 记录播放时间

    float duration =0;

    NSMutableArray *images = [NSMutableArray array];

    for(inti =0; i < frameCount; i ++) {

        // 3.1.获取图片

        CGImageRef cgImage = CGImageSourceCreateImageAtIndex(imageSource, i, nil);

        // 3.2.获取时长

        CFDictionaryRef properties = CGImageSourceCopyPropertiesAtIndex(imageSource, i, nil);

        NSLog(@"%@",properties);

        NSDictionary *gifInfo = (__bridgeNSDictionary*)properties;

        duration = [gifInfo[@"{GIF}"][@"DelayTime"] doubleValue] + duration;



        UIImage *image = [UIImage imageWithCGImage:cgImage];

        [images addObject:image];



        // 设置停止播放时显示的图片

        if(i == frameCount -1) {

            self.imageView.image = image;

        }

    }

    // 4.播放图片

    self.imageView.animationImages = images;

    // 播放总时间

    self.imageView.animationDuration = duration;

    // 播放次数, 0为无限循环

    self.imageView.animationRepeatCount = 1;

    // 开始播放

    [self.imageView startAnimating];