[iphone播放gif动画.docxVIP

iphone 播放gif动画//由两个类组成//GifView.h#importUIKit/UIKit.h#importImageIO/ImageIO.h#importMobileCoreServices/MobileCoreServices.h@protocolgifViewDelegate;@interfaceGifView :UIView{CGImageSourceRefgif;NSDictionary*gifProperties;size_tindex;size_tcount;NSTimer*timer;??inttag_Index;??idgifViewDelegate delegate;}@property(nonatomic)inttag_Index;@property(nonatomic,retain)idgifViewDelegate delegate;- (id)initWithFrame:(CGRect)frame filePath:(NSString*)_filePath;@end@protocolgifViewDelegate NSObject //自定义协议是为了派发点击事件-(void)selectedIndex:(int)tagIndex;@end//GifView.m#importGifView.h#importQuartzCore/QuartzCore.h@implementationGifView@synthesizetag_Index,delegate;- (id)initWithFrame:(CGRect)frame filePath:(NSString*)_filePath{?????self= [superinitWithFrame:frame];??if(self) {gifProperties= [[NSDictionarydictionaryWithObject:[NSDictionarydictionaryWithObject:[NSNumbernumberWithInt:0]forKey:(NSString*)kCGImagePropertyGIFLoopCount]forKey:(NSString*)kCGImagePropertyGIFDictionary]retain];gif=CGImageSourceCreateWithURL((CFURLRef)[NSURLfileURLWithPath:_filePath], (CFDictionaryRef)gifProperties);count=CGImageSourceGetCount(gif);timer= [NSTimerscheduledTimerWithTimeInterval:0.05target:selfselector:@selector(play)userInfo:nilrepeats:YES];[timerfire];//通过动态播放来实现的?? }??returnself;}-(void)play{index++;index=index%count;CGImageRefref =CGImageSourceCreateImageAtIndex(gif,index, (CFDictionaryRef)gifProperties);// 获取每一帧数的imageself.layer.contents= (id)ref;}-(void)removeFromSuperview{[timerinvalidate];timer=nil;[superremoveFromSuperview];}- (void)dealloc {CFRelease(gif);[gifPropertiesrelease];?? [superdealloc];}-(void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event{?? [delegateselectedIndex:tag_Index];//派发给先它的类}@end