iOS Gif图片展示N种方式(原生+第三方)_IOS

本文分享了iOS Gif图片展示N种方式，供大家参考，具体内容如下

原生方法:

1.UIWebView
特点:加载速度略长,性能更优，播放的gif动态图更加流畅。

//动态展示GIF图片-WebView
-(void)showGifImageWithWebView{
 //读取gif图片数据
 NSData *gifData = [NSData dataWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"earthGif" ofType:@"gif"]];
 //UIWebView生成
 UIWebView *imageWebView = [[UIWebView alloc] initWithFrame:CGRectMake(112, 302, 132, 102)];
 //用户不可交互
 imageWebView.userInteractionEnabled = NO;
 //加载gif数据
 [imageWebView loadData:gifData MIMEType:@"image/gif" textEncodingName:nil baseURL:nil];
 //视图添加此gif控件
 [self.view addSubview:imageWebView];
}

2.UIImagView
加载的方式更加快速,性能不如UIWebView,优点:易于扩展

1)
增加一个UIImageView的类别(category),增加两个方法
UIImage+Tool
.h

#import <UIKit/UIKit.h>

@interface UIImageView (Tool)

/** 解析gif文件数据的方法 block中会将解析的数据传递出来 */
-(void)getGifImageWithUrk:(NSURL *)url returnData:(void(^)(NSArray<UIImage *> * imageArray,NSArray<NSNumber *>*timeArray,CGFloat totalTime, NSArray<NSNumber *>* widths, NSArray<NSNumber *>* heights))dataBlock;

/** 为UIImageView添加一个设置gif图内容的方法： */
-(void)yh_setImage:(NSURL *)imageUrl;

@end

.m

//
// UIImageView+Tool.m
// OneHelper
//
// Created by qiuxuewei on 16/3/2.
// Copyright  2016年 邱学伟. All rights reserved.
//

#import "UIImageView+Tool.h"
//要引入ImageIO库
#import <ImageIO/ImageIO.h>

@implementation UIImageView (Tool)

//解析gif文件数据的方法 block中会将解析的数据传递出来
-(void)getGifImageWithUrk:(NSURL *)url returnData:(void(^)(NSArray<UIImage *> * imageArray, NSArray<NSNumber *>*timeArray,CGFloat totalTime, NSArray<NSNumber *>* widths,NSArray<NSNumber *>* heights))dataBlock{
 //通过文件的url来将gif文件读取为图片数据引用
 CGImageSourceRef source = CGImageSourceCreateWithURL((CFURLRef)url, NULL);
 //获取gif文件中图片的个数
 size_t count = CGImageSourceGetCount(source);
 //定义一个变量记录gif播放一轮的时间
 float allTime=0;
 //存放所有图片
 NSMutableArray * imageArray = [[NSMutableArray alloc]init];
 //存放每一帧播放的时间
 NSMutableArray * timeArray = [[NSMutableArray alloc]init];
 //存放每张图片的宽度 （一般在一个gif文件中，所有图片尺寸都会一样）
 NSMutableArray * widthArray = [[NSMutableArray alloc]init];
 //存放每张图片的高度
 NSMutableArray * heightArray = [[NSMutableArray alloc]init];
 //遍历
 for (size_t i=0; i<count; i++) {
  CGImageRef image = CGImageSourceCreateImageAtIndex(source, i, NULL);
  [imageArray addObject:(__bridge UIImage *)(image)];
  CGImageRelease(image);
  //获取图片信息
  NSDictionary * info = (__bridge NSDictionary*)CGImageSourceCopyPropertiesAtIndex(source, i, NULL);
  CGFloat width = [[info objectForKey:(__bridge NSString *)kCGImagePropertyPixelWidth] floatValue];
  CGFloat height = [[info objectForKey:(__bridge NSString *)kCGImagePropertyPixelHeight] floatValue];
  [widthArray addObject:[NSNumber numberWithFloat:width]];
  [heightArray addObject:[NSNumber numberWithFloat:height]];
  NSDictionary * timeDic = [info objectForKey:(__bridge NSString *)kCGImagePropertyGIFDictionary];
  CGFloat time = [[timeDic objectForKey:(__bridge NSString *)kCGImagePropertyGIFDelayTime]floatValue];
  allTime+=time;
  [timeArray addObject:[NSNumber numberWithFloat:time]];
 }
 dataBlock(imageArray,timeArray,allTime,widthArray,heightArray);
}

//为UIImageView添加一个设置gif图内容的方法：
-(void)yh_setImage:(NSURL *)imageUrl{
 __weak id __self = self;
 [self getGifImageWithUrk:imageUrl returnData:^(NSArray<UIImage *> *imageArray, NSArray<NSNumber *> *timeArray, CGFloat totalTime, NSArray<NSNumber *> *widths, NSArray<NSNumber *> *heights) {
  //添加帧动画
  CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"contents"];
  NSMutableArray * times = [[NSMutableArray alloc]init];
  float currentTime = 0;
  //设置每一帧的时间占比
  for (int i=0; i<imageArray.count; i++) {
   [times addObject:[NSNumber numberWithFloat:currentTime/totalTime]];
   currentTime+=[timeArray[i] floatValue];
  }
  [animation setKeyTimes:times];
  [animation setValues:imageArray];
  [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]];
  //设置循环
  animation.repeatCount= MAXFLOAT;
  //设置播放总时长
  animation.duration = totalTime;
  //Layer层添加
  [[(UIImageView *)__self layer]addAnimation:animation forKey:@"gifAnimation"];
 }];
}

@end

在加载gif的地方使用
导入 UIImageView+Tool

-(void)showGifImageWithImageView{

 UIImageView * imageView = [[UIImageView alloc]initWithFrame:CGRectMake(112, 342, 132, 102)];
 NSURL * url = [[NSURL alloc]initFileURLWithPath:[[NSBundle mainBundle] pathForResource:@"earthGif.gif" ofType:nil]];
 [imageView yh_setImage:url];
 [self.view addSubview:imageView];

}

第三方:
1.YLGIFImage
github链接: https://github.com/liyong03/YLGIFImage

#import "YLGIFImage.h"
#import "YLImageView.h"

-(void)showGifImageWithYLImageView{
 YLImageView* imageView = [[YLImageView alloc] initWithFrame:CGRectMake(112, 342, 132, 102)];
 CGFloat centerX = self.view.center.x;
 [imageView setCenter:CGPointMake(centerX, 402)];
 [self.view addSubview:imageView];
 imageView.image = [YLGIFImage imageNamed:@"earthGif.gif"];
}

2.FLAnimatedImage
github链接:https://github.com/Flipboard/FLAnimatedImage

-(void)showGifImageWithFLAnimatedImage{
 //GIF 转 NSData
 //Gif 路径
 NSString *pathForFile = [[NSBundle mainBundle] pathForResource: @"earthGif" ofType:@"gif"];
 //转成NSData
 NSData *dataOfGif = [NSData dataWithContentsOfFile: pathForFile];
 //初始化FLAnimatedImage对象
 FLAnimatedImage *image = [FLAnimatedImage animatedImageWithGIFData:dataOfGif];
 //初始化FLAnimatedImageView对象
 FLAnimatedImageView *imageView = [[FLAnimatedImageView alloc] init];
 //设置GIF图片
 imageView.animatedImage = image;
 imageView.frame = CGRectMake(112, 342, 132, 102);
 [self.view addSubview:imageView];
}

以上就是本文的全部内容，希望对大家的学习有所帮助。

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