震惊！ iOS 多张图片合成 GIF 后某些照片竟然会变得有点模糊，甚至有些丰富色彩的图片还会大片变白！

以下是 OC 代码 NSArray *document = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);

NSStrin *documenStr = [document objectAtIndex:0]; NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *textDic= [documenStr stringByAppendingString:@"/gif"]; [fileManager createDirectoryAtPath:textDic withIntermediateDirectories:YES attributes:nil error:nil]; NSString *path = [textDic stringByAppendingString:@"zomake.gif"]; NSLog(@"path = %@",path); CGImageDestinationRef destion; CFURLRef url = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, (CFStringRef)path, kCFURLPOSIXPathStyle, false); destion = CGImageDestinationCreateWithURL(url, kUTTypeGIF, imagePathArray.count, NULL); NSDictionary *frameDic = [NSDictionary dictionaryWithObject:[NSDictionary dictionaryWithObject:[NSNumber numberWithFloat:0.3] forKey:(NSString *)kCGImagePropertyGIFDelayTime] forKey:(NSString *)kCGImagePropertyGIFDictionary]; NSMutableDictionary *gifParmdict = [NSMutableDictionary dictionaryWithCapacity:2]; [gifParmdict setObject:[NSNumber numberWithBool:YES] forKey:(NSString *)kCGImagePropertyGIFHasGlobalColorMap]; [gifParmdict setObject:(NSString *)kCGImagePropertyColorModelRGB forKey:(NSString *)kCGImagePropertyColorModel]; [gifParmdict setObject:[NSNumber numberWithInt:8] forKey:(NSString *)kCGImagePropertyDepth]; [gifParmdict setObject:[NSNumber numberWithInt:0] forKey:(NSString *)kCGImagePropertyGIFLoopCount]; NSDictionary *gifProperty = [NSDictionary dictionaryWithObject:gifParmdict forKey:(NSString *)kCGImagePropertyGIFDictionary]; //单帧添加到 gif for (UIImage *dimage in imagePathArray) { CGImageDestinationAddImage(destion, dimage.CGImage,(__bridge CFDictionaryRef)frameDic); } CGImageDestinationSetProperties(destion, (__bridge CFDictionaryRef)gifProperty); CGImageDestinationFinalize(destion); CFRelease(destion); //此处解析 gif NSData *data = [NSData dataWithContentsOfFile:path]; //此处将得到的 nsData 转为 gif 动画 UIImage *gifImage = [UIImage sd_tz_animatedGIFWithData:data]; 

望 V 友们给点思路。