本文分享了iOS Gif圖片展示N種方式，供大家參考，具體內(nèi)容如下
原生方法:
1.UIWebView
特點:加載速度略長,性能更優(yōu)，播放的gif動態(tài)圖更加流暢。
//動態(tài)展示GIF圖片-WebView-(void)showGifImageWithWebView{ //讀取gif圖片數(shù)據(jù) NSData *gifData = [NSData dataWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"earthGif" ofType:@"gif"]]; //UIWebView生成 UIWebView *imageWebView = [[UIWebView alloc] initWithFrame:CGRectMake(112, 302, 132, 102)]; //用戶不可交互 imageWebView.userInteractionEnabled = NO; //加載gif數(shù)據(jù) [imageWebView loadData:gifData MIMEType:@"image/gif" textEncodingName:nil baseURL:nil]; //視圖添加此gif控件 [self.view addSubview:imageWebView];} 2.UIImagView
加載的方式更加快速,性能不如UIWebView,優(yōu)點:易于擴展
1)
增加一個UIImageView的類別(category),增加兩個方法
UIImage+Tool
.h
#import <UIKit/UIKit.h>@interface UIImageView (Tool)/** 解析gif文件數(shù)據(jù)的方法 block中會將解析的數(shù)據(jù)傳遞出來 */-(void)getGifImageWithUrk:(NSURL *)url returnData:(void(^)(NSArray<UIImage *> * imageArray,NSArray<NSNumber *>*timeArray,CGFloat totalTime, NSArray<NSNumber *>* widths, NSArray<NSNumber *>* heights))dataBlock;/** 為UIImageView添加一個設置gif圖內(nèi)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 邱學偉. All rights reserved.//#import "UIImageView+Tool.h"//要引入ImageIO庫#import <ImageIO/ImageIO.h>@implementation UIImageView (Tool)//解析gif文件數(shù)據(jù)的方法 block中會將解析的數(shù)據(jù)傳遞出來-(void)getGifImageWithUrk:(NSURL *)url returnData:(void(^)(NSArray<UIImage *> * imageArray, NSArray<NSNumber *>*timeArray,CGFloat totalTime, NSArray<NSNumber *>* widths,NSArray<NSNumber *>* heights))dataBlock{ //通過文件的url來將gif文件讀取為圖片數(shù)據(jù)引用 CGImageSourceRef source = CGImageSourceCreateWithURL((CFURLRef)url, NULL); //獲取gif文件中圖片的個數(shù) size_t count = CGImageSourceGetCount(source); //定義一個變量記錄gif播放一輪的時間 float allTime=0; //存放所有圖片 NSMutableArray * imageArray = [[NSMutableArray alloc]init]; //存放每一幀播放的時間 NSMutableArray * timeArray = [[NSMutableArray alloc]init]; //存放每張圖片的寬度 （一般在一個gif文件中，所有圖片尺寸都會一樣） NSMutableArray * widthArray = [[NSMutableArray alloc]init]; //存放每張圖片的高度 NSMutableArray * heightArray = [[NSMutableArray alloc]init]; //遍歷 for (size_t i=0; i<count; i++) { CGImageRef image = CGImageSourceCreateImageAtIndex(source, i, NULL); [imageArray addObject:(__bridge UIImage *)(image)]; CGImageRelease(image); //獲取圖片信息 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);}//為UIImageView添加一個設置gif圖內(nèi)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) { //添加幀動畫 CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"contents"]; NSMutableArray * times = [[NSMutableArray alloc]init]; float currentTime = 0; //設置每一幀的時間占比 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]]; //設置循環(huán) animation.repeatCount= MAXFLOAT; //設置播放總時長 animation.duration = totalTime; //Layer層添加 [[(UIImageView *)__self layer]addAnimation:animation forKey:@"gifAnimation"]; }];}@end 在加載gif的地方使用
導入 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鏈接: 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鏈接:https://github.com/Flipboard/FLAnimatedImage
-(void)showGifImageWithFLAnimatedImage{ //GIF 轉(zhuǎn) NSData //Gif 路徑 NSString *pathForFile = [[NSBundle mainBundle] pathForResource: @"earthGif" ofType:@"gif"]; //轉(zhuǎn)成NSData NSData *dataOfGif = [NSData dataWithContentsOfFile: pathForFile]; //初始化FLAnimatedImage對象 FLAnimatedImage *image = [FLAnimatedImage animatedImageWithGIFData:dataOfGif]; //初始化FLAnimatedImageView對象 FLAnimatedImageView *imageView = [[FLAnimatedImageView alloc] init]; //設置GIF圖片 imageView.animatedImage = image; imageView.frame = CGRectMake(112, 342, 132, 102); [self.view addSubview:imageView];} 以上就是本文的全部內(nèi)容，希望對大家的學習有所幫助。
