UIImageView+Kit.h文件
#import
NS_ASSUME_NONNULL_BEGIN
@interface UIImageView (Kit)
- (void)loadGIFImageNamed:(NSString *)name;
@end
NS_ASSUME_NONNULL_END
#import "UIImageView+Kit.h"
@implementation UIImageView (Kit)
- (void)loadGIFImageNamed:(NSString *)name {
/// 找到GIF图片文件路径
NSURL *fileUrl = [[NSBundle mainBundle] URLForResource:name withExtension:@"gif"];
/// 将GIF图片转换成对应的图片资源
CGImageSourceRefimageSourceRef =CGImageSourceCreateWithURL((__bridgeCFURLRef)fileUrl,NULL);
/// 从图片资源中获取图片帧数，即由多少图片元素组成（注：GIF图片本质是有多张图片合成流动图片）
size_timageCount =CGImageSourceGetCount(imageSourceRef);
/// 定义数组拆分图片源
NSMutableArray*images = [NSMutableArrayarrayWithCapacity:imageCount];
/// 定义动画持续时长
floatanimationDuration =0.f;
/// 循环获取图片元素
for(size_ti =0; i < imageCount; i++) {
/// 从图片资源中取出图片元素，即每一帧的图片
CGImageRefimageRef =CGImageSourceCreateImageAtIndex(imageSourceRef, i ,NULL);
///图片转换
UIImage*image = [UIImageimageWithCGImage:imageRef];
///存储图片
[imagesaddObject:image];
///获取元素图片的信息
NSDictionary*imageElementInfo = (__bridgeNSDictionary*)CGImageSourceCopyProperties(imageSourceRef,NULL);
///获取元素动画信息
NSDictionary*imageElementGIFInfo = [imageElementInfoobjectForKey:(__bridgeNSString*)kCGImagePropertyGIFDictionary];
/// 初始化每帧之间间隔的属性。
CGFloatduration =0.1f;
NSNumber*unclampedDelayTime = [imageElementGIFInfoobjectForKey:(__bridgeNSString*)kCGImagePropertyGIFUnclampedDelayTime];
if(unclampedDelayTime) {
duration= unclampedDelayTime.floatValue;
}else{
NSNumber*delayTime = [imageElementGIFInfoobjectForKey:(__bridgeNSString*)kCGImagePropertyGIFDelayTime];
if(delayTime) {
duration= delayTime.floatValue;
}
}
/// 获取延迟时间可能为0.f
if(duration <=0.011f) duration =0.100f;
animationDuration += duration;
///释放内存
CGImageRelease(imageRef);
}
/// 图片控件载入动画图片数组
self.animationImages= images;
/// 设置动画持续时长
self.animationDuration= animationDuration;
/// 设置动画重复次数
self.animationRepeatCount = MAXFLOAT;
///开启动画
[self startAnimating];
}
@end