1、建立影象目標

1. CGImageDestinationRef destination;  

1. /* 
2.      path 
3. */

3、建立CFURLRef物件

1. CFURLRef url = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, (CFStringRef)path, kCFURLPOSIXPathStyle, NO);  

1. destination = CGImageDestinationCreateWithURL(url, kUTTypeGIF, mArray
   .count, nil);  

1. NSDictionary *frameProperties = [NSDictionary dictionaryWithObject:[NSMutableDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithFloat:0.18],(NSString *)kCGImagePropertyGIFDelayTime, nil nil] forKey:(NSString *)kCGImagePropertyGIFDictionary];  
2. //設定gif資訊
3. NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithCapacity:2];  
4. [dict setObject:[NSNumber numberWithBool:YES] forKey:(NSString *)kCGImagePropertyGIFImageColorMap];  
5. [dict setObject:(NSString *)kCGImagePropertyColorModelRGB forKey:(NSString *)kCGImagePropertyColorModel];  
6. [dict setObject
   :[NSNumber numberWithInt:8] forKey:(NSString *)kCGImagePropertyDepth];  
7. [dict setObject:[NSNumber numberWithInt:0] forKey:(NSString *)kCGImagePropertyGIFLoopCount];  
8. NSDictionary *gifProperties = [NSDictionary dictionaryWithObject:dict forKey:(NSString *)kCGImagePropertyGIFDictionary];  

1. for (UIImage *dImg in mArray)  
2.   {  
3.          CGImageDestinationAddImage(destination, dImg.CGImage, (__bridge CFDictionaryRef)frameProperties);  
4.   }  

1. CGImageDestinationSetProperties(destination, (__bridge CFDictionaryRef)gifProperties);  

1. CGImageDestinationFinalize(destination);  

1. CFRelease(destination);