iOS常用技术-序列帧动画
1 // 2 // ViewController.m 3 // 序列帧动画 4 // 5 // Created by 大欢 on 16/1/20. 6 // Copyright © 2016年 bjsxt. All rights reserved. 7 // 8 9 #import "ViewController.h" 10 #import "UIImageView+GIF.h" 11 12 @interface ViewController () 13 - (IBAction)playAction:(id)sender; 14 - (IBAction)stopAction:(id)sender; 15 16 @property (nonatomic, strong) UIImageView * imageView; 17 18 @end 19 20 @implementation ViewController 21 22 - (void)viewDidLoad { 23 [super viewDidLoad]; 24 25 //播放gif动画 26 NSString * path = [[NSBundle mainBundle] pathForResource:@"hehua" ofType:@"gif"]; 27 UIImageView * imageView = [UIImageView imageViewWithGIFFile:path frame:CGRectMake(100, 100, 200, 200)]; 28 [self.view addSubview:imageView]; 29 30 } 31 32 - (void)animation { 33 34 NSMutableArray * array = [NSMutableArray array]; 35 36 for (int i = 1; i < 6; i++) { 37 38 NSString * string = [NSString stringWithFormat:@"hehua0%d",i]; 39 UIImage * image = [UIImage imageNamed:string]; 40 [array addObject:image]; 41 } 42 43 self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)]; 44 //设置动画图片 45 self.imageView.animationImages = array; 46 //动画时间 47 self.imageView.animationDuration = 1; 48 //动画播放重复次数，值为0时，无限循环 49 self.imageView.animationRepeatCount = 0; 50 //开始动画 51 [self.imageView startAnimating]; 52 [self.view addSubview:self.imageView]; 53 } 54 55 56 - (IBAction)playAction:(id)sender { 57 58 [self.imageView stopAnimating]; 59 } 60 61 - (IBAction)stopAction:(id)sender { 62 63 [self.imageView startAnimating]; 64 } 65 @end
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1 // 2 // UIImageView+GIF.h 3 // day3 4 // 5 // Created by andezhou on 16/1/2. 6 // Copyright © 2016年 周安德. All rights reserved. 7 // 8 9 #import <UIKit/UIKit.h> 10 11 @interface UIImageView (GIF) 12 13 // 从指定的路径加载GIF并创建UIImageView 14 + (UIImageView *)imageViewWithGIFFile:(NSString *)file frame:(CGRect)frame; 15 16 @end
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1 // 2 // UIImageView+GIF.m 3 // day3 4 // 5 // Created by andezhou on 16/1/2. 6 // Copyright © 2016年 周安德. All rights reserved. 7 // 8 9 #import "UIImageView+GIF.h" 10 #import <ImageIO/ImageIO.h> 11 #import <CoreText/CoreText.h> 12 /* 13 ARC下需要手动管理内存的有(Core) 14 CT开头,例如：CTRunRef 15 CF开头,例如：CTFrameRef 16 CG开头,例如：CGImageSourceRef 17 */ 18 19 @implementation UIImageView (GIF) 20 21 + (UIImageView *)imageViewWithGIFFile:(NSString *)file frame:(CGRect)frame 22 { 23 UIImageView *imageView = [[UIImageView alloc] initWithFrame:frame]; 24 // 加载gif文件数据 25 NSData *gifData = [NSData dataWithContentsOfFile:file]; 26 27 // GIF动画图片数组 28 NSMutableArray *frames = nil; 29 // 图像源引用 30 CGImageSourceRef src = CGImageSourceCreateWithData((__bridge CFDataRef)gifData, NULL); 31 // 动画时长 32 CGFloat animationTime = 0.f; 33 34 if (src) { 35 // 获取gif图片的帧数 36 size_t count = CGImageSourceGetCount(src); 37 // 实例化图片数组 38 frames = [NSMutableArray arrayWithCapacity:count]; 39 40 for (size_t i = 0; i < count; i++) { 41 // 获取指定帧图像 42 CGImageRef image = CGImageSourceCreateImageAtIndex(src, i, NULL); 43 44 // 获取GIF动画时长 45 NSDictionary *properties = (__bridge NSDictionary *)CGImageSourceCopyPropertiesAtIndex(src, i, NULL); 46 NSDictionary *frameProperties = [properties objectForKey:(NSString *)kCGImagePropertyGIFDictionary]; 47 NSNumber *delayTime = [frameProperties objectForKey:(NSString *)kCGImagePropertyGIFUnclampedDelayTime]; 48 animationTime += [delayTime floatValue]; 49 50 if (image) { 51 [frames addObject:[UIImage imageWithCGImage:image]]; 52 CGImageRelease(image); 53 } 54 } 55 56 CFRelease(src); 57 } 58 59 [imageView setImage:[frames objectAtIndex:0]]; 60 [imageView setBackgroundColor:[UIColor clearColor]]; 61 [imageView setAnimationImages:frames]; 62 [imageView setAnimationDuration:animationTime]; 63 [imageView startAnimating]; 64 65 return imageView; 66 } 67 68 @end
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