GIF图片使用

.h文件

//  UIImageView+GIF.h

//  DemoGif

//

//  Created by yidong on 15/12/5

#import <UIKit/UIKit.h>

 

@interface UIImageView (GIF)

 

// 从指定的路径加载GIF并创建UIImageView

+ (UIImageView*)imageViewWithGIFFile:(NSString*)file frame:(CGRect)frame;

 

@end

.m文件

 

//  UIImageView+GIF.m

//  DemoGif

//

//  Created by yidong on 15/12/5

 

#import "UIImageView+GIF.h"

#import <ImageIO/ImageIO.h>

 

@implementation UIImageView (GIF)

 

+ (UIImageView*)imageViewWithGIFFile:(NSString*)file frame:(CGRect)frame

{

    UIImageView *imageView = [[UIImageView alloc]initWithFrame:frame];

 

    // 加载gif文件数据

    NSData *gifData = [NSData dataWithContentsOfFile:file];

 

    // GIF动画图片数组

    NSMutableArray *frames = nil;

    // 图像源引用

    CGImageSourceRef src = CGImageSourceCreateWithData((__bridge CFDataRef)gifData,NULL);

    // 动画时长

    CGFloat animationTime = 0.f;

 

    if (src) {

        // 获取gif图片的帧数

        size_t count = CGImageSourceGetCount(src);

        // 实例化图片数组

        frames = [NSMutableArray arrayWithCapacity:count];

 

        for (size_ti = 0; i < count; i++) {

            // 获取指定帧图像

            CGImageRef image = CGImageSourceCreateImageAtIndex(src, i, NULL);

 

            // 获取GIF动画时长

            NSDictionary *properties = (__bridge NSDictionary*)CGImageSourceCopyPropertiesAtIndex(src, i,NULL);

            NSDictionary *frameProperties = [propertiesobjectForKey:(NSString*)kCGImagePropertyGIFDictionary];

            NSNumber*delayTime = [frameProperties objectForKey:(NSString*)kCGImagePropertyGIFUnclampedDelayTime];

            animationTime += [delayTimefloatValue];

 

            if (image) {

                [frames addObject:[UIImage imageWithCGImage:image]];

                CGImageRelease(image);

            }

        }

 

        CFRelease(src);

    }

 

    [imageView setImage:[frames objectAtIndex:0]];

    [imageView setAnimationImages:frames];

    [imageView setAnimationDuration:animationTime];

    [imageView startAnimating];

   

    return imageView;

}

 

@end

直接在控制器里面使用

//  ViewController.m

//  GIF图片使用

 

#import "ViewController.h"

#import "UIImageView+GIF.h"

 

@interface ViewController()

 

@end

 

@implementation ViewController

 

- (void)viewDidLoad

{

    [super viewDidLoad];

 

    // 对于gif格式的图片,必须要加@2x

    NSString *path = [[NSBundle mainBundle]pathForResource:@"lengtuchongbai.gif@2x" ofType:@"png"];

      UIImageView *imageView = [UIImageView imageViewWithGIFFile:path

                                                        frame:CGRectMake(60,130, 200, 200)];

    [self.view addSubview:imageView];

}

 

@end