iOS Gif圖片展示N種方式(原生+第三方)_IOS

本文分享了iOS Gif圖片展示N種方式，供大家參考，具體內容如下

原生方法:

1.UIWebView
特點:載入速度略長,效能更優，播放的gif動態圖更加流暢。

//動態展示GIF圖片-WebView-(void)showGifImageWithWebView{ //讀取gif圖片資料 NSData *gifData = [NSData dataWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"earthGif" ofType:@"gif"]]; //UIWebView產生 UIWebView *imageWebView = [[UIWebView alloc] initWithFrame:CGRectMake(112, 302, 132, 102)]; //使用者不可互動 imageWebView.userInteractionEnabled = NO; //載入gif資料 [imageWebView loadData:gifData MIMEType:@"image/gif" textEncodingName:nil baseURL:nil]; //視圖添加此gif控制項 [self.view addSubview:imageWebView];}

2.UIImagView
載入的方式更加快速,效能不如UIWebView,優點:易於擴充

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檔案資料的方法 block中會將解析的資料傳遞出來 */-(void)getGifImageWithUrk:(NSURL *)url returnData:(void(^)(NSArray<UIImage *> * imageArray,NSArray<NSNumber *>*timeArray,CGFloat totalTime, NSArray<NSNumber *>* widths, NSArray<NSNumber *>* heights))dataBlock;/** 為UIImageView添加一個設定gif圖內容的方法： */-(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檔案資料的方法 block中會將解析的資料傳遞出來-(void)getGifImageWithUrk:(NSURL *)url returnData:(void(^)(NSArray<UIImage *> * imageArray, NSArray<NSNumber *>*timeArray,CGFloat totalTime, NSArray<NSNumber *>* widths,NSArray<NSNumber *>* heights))dataBlock{ //通過檔案的url來將gif檔案讀取為圖片資料引用 CGImageSourceRef source = CGImageSourceCreateWithURL((CFURLRef)url, NULL); //擷取gif檔案中圖片的個數 size_t count = CGImageSourceGetCount(source); //定義一個變數記錄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檔案中，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]; //遍曆 for (size_t i=0; i<count; i++) {  CGImageRef image = CGImageSourceCreateImageAtIndex(source, i, NULL);  [imageArray addObject:(__bridge UIImage *)(image)];  CGImageRelease(image);  //擷取圖片資訊  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添加一個設定gif圖內容的方法：-(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;  //設定每一幀的時間佔比  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]];  //設定迴圈  animation.repeatCount= MAXFLOAT;  //設定播放總時間長度  animation.duration = totalTime;  //Layer層添加  [[(UIImageView *)__self layer]addAnimation:animation forKey:@"gifAnimation"]; }];}@end

在載入gif的地方使用
匯入 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連結: 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連結:https://github.com/Flipboard/FLAnimatedImage

-(void)showGifImageWithFLAnimatedImage{ //GIF 轉 NSData //Gif 路徑 NSString *pathForFile = [[NSBundle mainBundle] pathForResource: @"earthGif" ofType:@"gif"]; //轉成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]; //設定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容，希望對大家的學習有所協助。