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。
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//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
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#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
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//// 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
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-(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
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#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
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-(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。
